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April 19, 1949.
6 Sheets-Sheet 1
Filed Dec. ‘7, 1944
Fig. la.
April 119, 1949.
Filed Dec. 7, 1944
6 Sheets-Sheet 2
April 19, 1949-
Filed Dec‘. 7, 1944
6 Sheets-Sheet 3
/43 90
‘April 19, 1949.
6 Sheets-Sheet 4
, Filed Dem 7, 1944
April 19, 1949.
6 Sheets-Sheet 5
Filed Dec. 7, 1944 .
April 19, 1949.
6 Sheds-Sheet 6
Filed Dec. "7, ‘1944
znfw -
Patented Apr. 19, 1949
Edward Noel Griffith, Little ,Hallingbury .Park,
and Arthur Clifford Howard, Up'mi'nster, Eng2
Application December 7, 1944, Serial No. 566,992
In Great Britain September 13, 1943
1 Claim. (oi. si-qsol
This invention ‘relates to soil and like cutting
andhlifting machines, and has for its object to
Figs. 2A and 2B are, respectively, plan views
c'clrresponding with Figs. 1A and 1B,
provide a power-operated machine that will cut
soil, compacted manure, certain minerals, and
Fig. 3 is an end View, from the left or Fig. 1A,
the’ like; that will break up the material so cut;
and that will lift it to a convenient position for
loading on to a lorry or the like.
_ _A machine according to this invention com
prises a rotary cutter and a conveyor, both
mounted on a tractorand having ‘gearing through
which the cutter, the conveyor, and the machine
as a whole, can be driven.
Conveniently, the tractor is one provided with
a reduction gear, and the cutter, the conveyor,
and associated mechanism, can be detachably
showing the arrangement Of the ‘rotary Cutters
and conveyors‘,
Fig. 4 is a detail sectional elevation of the ‘drive
for the rotary cutters, the conveyors, and the ‘de
livery chute, to an enlarged scale. This view
h"s been broken for the convenience of illus
tration, the ‘break being indicated by the chain
dotted line X—-X, and
Figure 5 is a seeti’on through the trough and
> the, upper run of the conveyor.
Referring to ‘the drawings‘ avtractor, indicated
' secured to it. ‘The disposition of the components
at 84, carries a rotary [cutter 85 arranged trans
versely at therear in bearings in the side walls
such that the front of the machine is at the
rear of the tractor, which latter is adapted to be
driven in reverse during normal operation of the
The rotary cutter may consist of a shaft car
rying one or more cutting tools adapted, in ad
dition, to feed the material cut from both ends
of the shaft towards the centre, and to throw
n; on as the conveyor.
In instané' s where the entrance to the con
veyor trough is through a throat, a secondary
endless conveyor ‘chain with transverse blades
is preferably disposed in the top of the throat
machine (Figs. 1A and 1B together showing a
side elevation of the complete machine),
of a housing 86. ‘The conveyor trough ‘81 is se
cured by a ‘laterally ‘flared portion, or a plain
wall 88, at the front of the machine to the hous
ing 86, and a chain case 89 is secured to one side
wall of said housing. A transverse tube 90, fast
with the ‘chain ‘casei89 and which contains atrans
verse drive shaft thereinafter described, is con
nected pivotally by ariiis'Sl and 92 to the tractor,
the connection being ‘to the leg‘s'of substantially Y
shaped plates 93 and 94 secured to the tractor rear
axle casing. The rear ‘of the trough 81 is piv
otally supported on struts 95 at the front of the
.so as to prevent said throat from being choked 30 tractor, there being sui?cient clearance at the
with the material beingobéi‘ated upon.
pivots to permit of the pivotal movement taking
When a machine according to this invention is
designed for use on high ‘heaps of material to ‘be
, The rotary cutter 85, which comprises a shaft
em and conveyed, a secondary rotary cutter
may be journalled above the main one and be
s'upportedan'd driven in any suitable manner.
In somecases, a horizontally swinging deliv
ery chute may be pivoted beneath the delivery
'95 carrying substantially L-shaped cutting tools
'91 and sweeping tools 98 in pairs, is connected
to be driven so that vthe tools, when viewed from
above, move forwardly from the machine and
downwardly through the layer of material being
end of the conveyor so as to enable the material
being-operated upon to be uniformly loaded into
a lorry without it being necessary to move the
operated upon. The ‘tools 9i and 98 are formed
from metal plate, bent to the required shape, and
securedto the shaft 96 by being bolted to arms
'99 welded to the latter. Both ‘these types of
lorry or to manhandle the material after loading.
In order that the present invention may be
blade have the'lateralarm of the L extending at
clearly understood, it will now be more partic 45 an angle to the plane containing the axis of said
ularly describedjwith reference to the accompany
shaft, as shown,'so_that the elbow of the L is in
the lead._ .Theleading edge of the tools 91 form
their cutting'ed‘ges and are further from the axis
of the shaft 96 than their trailing edges so as
the compacted accretions of farmyard manure
‘from byres and-stables and for loading them on 50 to provide clearance for the latter, Whilstthe
tools 98 are arranged‘s'o as to present a side sur
‘to lorries or the like.
to the material to be swept. As shown, the
Of these drawings, ,
mg‘ drawings which illustrate an embodiment of
the invention particularly adapted for clearing
Fig. 1A is a ‘side elevation of ‘the front end of
they machine,
1B is aside elevation of the rear of the 55
pairs of was 9'land
are arranged in oppo
sitely directed heliees proceeding from opposite
ends of the shaft '96, and the ‘tool 91 of each pair
projects radially beyond the tool 98 by an amount
equal to half the forward travel of the machine
during one complete rotation of the rotor; there
being 180 degrees between each cutting tool and
rod H8 has a thrust collar I2I, and the upright
I20 is stayed by a strut I22 to the arm 9|.
When the handle is turned, the rod II8 screws
into the nut H1 and raises the housing 86, to
gether with the, rotary cutter and conveyor, clear
its associated sweeping tool. In this way, the
tools 91 cut progressively from the elbow of the
of the ground. During this lifting movement,
L, and both the tail of the cutting tool and the
the rear of the conveyor, that is, the upper end,
whole of the lateral arm of the sweeping tool
is permitted to make its complementary move
move the cut material towards the centre of the
ment by reason of the pivoted struts 95. When
shaft; the sweeping tools, and to some measure 10 the lifting device is used as an alternative for
the cutting tools, throwing the cut material onto
the depth control mechanism, instead of as an
the conveyor.
Obviously, instead of there being one helix of
each of the tools 91 and 98 at each end of the
shaft 96, there could be more of either, or both,
of them.
The ends of the shaft 96 are received in bear
ings in the side walls of the housing 06, and one
end, the upper one shown in Fig. 2A, projects
into the chain case 89 in which it is provided
with a chain sprocket I00.
The conveyor consists of an endless chain, in
dicated at IOI, trained about upper and lower
sprockets I02 and I03, and provided with‘trans
verse blades I04 at equal intervals along its
length. ‘ The upper run of the chain is in a slot
in a partition I90 of the trough‘ 81 and ya por
tion of the latter, above the partition is com
pletely compartmented by the conveyor blades
I00, see Fig. 5, the trough above this level hav
ing outwardly sloping sides. The lower run of
the chain is enclosed between the bottom of‘ the
partition mentioned above and a floor secured
to the conveyor chute, so that any material fall
ing through the slot in the partition is collected
addition thereto, the depth of operation is con
trolled by turning. the rod H8 as will be readily
The drive for the rotary cutter and conveyor
comprises a longitudinal drive shaft I23 incor
porating a dog clutch I24 and connected at the
rear by bevel gears I25 and I26 to the tractor
power take-off shaft I21. The shaft I23 car
ries a bevel pinion I20 at the front whichis in
permanent mesh ‘with a bevel gear ‘I29 on a
transverse shaft I30 that is disposed within‘ the
transverse tube 90, which, as hereinbefore stated,
is pivoted by the arms 9| and 92 to the ‘tractor.
A driving chain I3I, indicated by the chain
dotted line in Fig. 4,is trained about a sprocket
I32 on the shaft I30 andabout a sprocket I33
on the rotary cutter shaft 96. The outer side
of the lower run of the chain I 3I ‘also passes
over a sprocket I34 on the spindle I94 that car
ries the lower sprocket I03 that engages the con
veyor chain. In this way, the'rotary cutter and
conveyor ‘are driven in opposite directions, the
former downwardly towards the front of the ma
chine when viewed from above so as to feed the
material cut rearwardly under the cutter, and
the latter upwardly so as to collect and raise the
, and swept by the blades I04 down to the bot
tom of the conveyor from whence they are picked
up‘again. The upper sprocket I02 of the con
veyor is supported in bearings formed in blocks
In use, the tractor is driven ‘slowly in reverse,
I05, slidable in slots I06 in the side walls of the 40 and the rotary cutter works into the face of the
‘chute 81, and urged by a spring-loaded push rod
I01, held in a guide I 08 on said trough, in the
direction to take up slackness in the chain. A
nut and lock-nut, indicated at I09, enable the
effort of the springito be adjusted so that the
sprocket I02 ?oats during operation.
The lower end of the housing 86 is provided
material to be operated upon, scooping it out of
the face and on to the conveyor from whence it
is delivered into the lorry or ‘the like. The
scraper IIO, either clears the floor on which the
materialhas accumulated,'orllevels off the cut
made in readiness for the next one; this being
regulated by the depth control skidsII3 or by
the screwed rod IIO of the lifting device. When
it is desired to move the machine to another
with a scraper IIO, consisting of a renewable
steel strip bolted to a register bar III welded to
a box girder II2 secured to said housing across 50 site, the crank handle of the rod H8 is operated
the width of the machine.
to raise the machine, and'during this move
A depth control skid I I3, one of vwhich may be
ment, the shaft I23 and its tubular housing‘ I 35
disposed at each side of the machine, is pivoted
pivot about the axis of the tractor power take
at its, forward end to the scraper support, and
off shaft. As the pivotal connection between
pivoted at the rear to the lower end of a long 55 the arms BL 92 and the arms 93, 94 is not coin
nut H4 which receives a. screwed rod II5 sup
cident with the axis“ of the power take-oil! shaft,
. ported in a bracket I IE on the housing 36. The
the shaft I23 and the housing I35 include tele
rod II5 has a. locating collar at each side of the
scopic elements; For this purpose, the shaft I 23
bracket IIS, and a crank handle at the top.
is divided into two portions, one pinned within
The arrangement is such that upon turning the 60 'an internally splinedsleeve I36, and the‘other
handles, the skids are turned about their pivotal
provided withvsplines “and slidable withinsaid
connection to the scraper support, independ
sleeve during this pivoting movement. The
ently, and ensure an even bearing of the ma
housing I35 is formed‘in two ‘parts, the adjacent
chine on the ground at the requisite height for
end of one beingslidable within the other. .
operating on the material to be cut and lifted.
Another feature ofthis invention is also illus
To facilitate transport, and in some instances
trated by Figs.,1A, 1B, 2A and 2B, ‘and this con
as an alternative to the depth control means de
sists-in the provision of an upper and additional
scribed in the previous paragraph, a lifting de
rotary cutter I31 for use Onmachines especially
vice is provided. This device comprises a long
designed for working _on,hi_g_her heaps of mate
nut II1 pivoted to the tractor gear case 84, and 70 rial than the machine already described ,with
receiving a . screwed rod II8 having a crank
handle at the top. This rod passes through a
reference to those ?gures, enabling'tlie material
to be disposed_ of with‘ fewer adjustments to the
trunnion bearing I I9 at the top of an upright
depth control setting.
1 I20 securedv to thearm19I, by which. the ma
‘The rotary. cutter‘I31 is provided with tools
chine is pivotally attached to the tractor. The 75 which may be similar to the tools 91 for but
area-e1 9
An- extension piece, on: the bearing tube I56,
ting the material, and may also have tool-s simi
larto the tools 98' for feeding the cut material
towards the centre of the cutter; these tools are
respectively designated 91a and 98a. A chain
sprocket I38 is mounted on the shaft I39 of the
cutter I31, and is driven by a chain I40 trained
3 about a driving sprocket I4I secured to the outer
end of a stub shaft I42 journalled in the chain
case 89 and carrying a sprocket I43 within the
case 89, see Fig. 4. The sprocket I43 is engaged IO
is provided- with a1 tooth I166‘ adapted. to be en
gaged: by one‘ of a series of teeth. on an arm I61
pivoted beneath the‘chuter I149 so‘ as to holdrthe
latter in an angul-arly adjusted position.
The chute I49 is also provided with a lateral
ly extending arm I68, see- Fig. 2B, which has-a
rod- I69‘ pivoted to it. This rod extends towards
the front of the machine and terminates in, a
handle Ill], conveniently situated for the opera
by the chain I3I and drives the shaft I39 through
the sprockets I4! and I38 and the chain I49. The
shaft I39, see Figs. 2A and 3, is supported in bear
ings in a chain case I92" for the chain I40 at
one end and in the opposite wall of the housing
86 at the other.
A further feature resides in the provision- of
a secondary conveyor, in instances where the
portion 88 of the conveyor trough is enclosed at
tor, so that the chute can be swung from side
to side about its vertical bearing when a lorry
is being loaded.
With this construction, the main conveyor is
V preferably provided with a depending shield I'II,
whose position may be adjustable, to ensure‘ that
the material leaving it is de?ected into the chute
chain I8I, trained about sprockets I48 and MT.
Where the machine is provided with a secondary
. flexible or articulated shaft I59 (which is made
If desired, a dog clutch, indicated at I93, may
the top, so as to prevent the material that has 20 be incorporated in the extension I23a of the shaft
I23, so as to enable the drive to the chute con
been cut from choking the entrance to the main
veyor to be disconnected.
conveyor. This secondary conveyor comprises a
When the rotary cutter and conveyor have been
chain I44 provided with transverse blades I45,
raised for transport from one site to another, the
similar to the ones I844 on the main conveyor
telescopic for this purpose), enables the drive
shaft I23 and its casing I35 to pivot about the
axis of the power take-off shaft freely. Also the
rotary cutter I3l, the sprocket I46 for driving
the secondary conveyor is conveniently mounted
on the secondary cutter shaft I39. When, how
articulation or ?exibility of said shaft I59, to
gether with its extensible character, enable it to
drive the chute conveyor without hindrance when
the height of the rotary cutter has been adjusted
by the depth control skids or the lifting device.
ever, such a secondary cutter is not provided, a
shaft I39 supported and driven in the same way
may be employed solely for driving the second
ary conveyor.
It will be understood that ball or any other
bearings suitable for the speci?c purpose may be
When the portion 88 of the conveyor trough is
enclosed at the top, and the secondary conveyor
is provided, a de?ector I48 is preferably disposed
provided for the various sprocket shafts, and that
at the rear of the conveyor trough top so as to
friction or other overload clutches may be pro
vided in the shafts subject to sudden variations
in load. Such a friction clutch is shown on the
rotary cutter shaft 96 in Fig. 4, and comprises a
?anged collar I8! keyed or splined to a portion of
prevent the material being thrown upwards as it
leaves the secondary conveyor.
A still further feature consists of the provision
of a device for enabling the material falling from
the upper and rear end of the main conveyor to
a short shaft I82, carrying the sprocket I33, by
be loaded uniformly into the lorry. To this end,
a nut £83. The rotary cutter shaft 96 is formed
hollow to receive the shaft I82, and has a ?ange
I84 carrying spring-loaded bolts I85 that urge a
ring I86 and friction ring I81 on to the ?ange of
the collar I8I. In this way, if the drive becomes
a chute I49 is pivoted on a vertical axis at one
end beneath the delivery from the conveyor
trough 81; the pivoted end of the chute being
closed by a wall indicated at I58, and in some
cases being formed somewhat in the form of a
overloaded, the sprocket is permitted to slip with
The chute I49, which is shown broken
away in the illustrations, contains an endless con 50
veyor consisting of a chain I5I, with transverse
blades I52, trained about sprockets I 53 and I54
on shafts journalled in the side walls of the chute.
A tensioning device, not shown, similar to that
for the sprocket I82, may be provided for the
sprocket I54.
The chute M9 is pivoted,‘ between arms I55,
co-axially with the sprocket I53, and the arms
respect to the shaft it drives.
We claim:
A machine for cutting and lifting soil and like
material, comprising a wheeled frame; a rotary
cutter shaft arranged transversely at one end of
said frame; two series of radial arms arranged in
diametrically opposed pairs on said shaft, and
proceeding from near each end thereof towards
the centre, the series of arms on opposite sides of
the centre of said shaft forming helices which are
opposite in direction; a cutting tool on one arm
I55 are secured to a bearing tube I56 surround
ing the upper end of a vertical drive shaft I5‘I 60 of each said pair and a sweeping tool on the other
arm of each said pair, the tools being substan
for the chute conveyor. The lower end of the
tially L-shaped and bent from metal plate so that
tube I56 rests on the top of a tubular stanchion
the arms of the L extend towards the centre of
I58 supported at the front of the tractor.
the cutter with the elbows of the L in the lead
Drive for the chute conveyor is from a rear
ward extension I'23a of the main drive shaft I23, 65 when the cutter is rotated; the cutting tools ex
tending radially beyond the sweeping tools by an
and is communicated to said conveyor by a ?ex
amount equal to half the forward travel of the
machine during one rotation of the rotary cut
ter, and having their cutting edges farther from
the shaft than their trailing edges so as to pro
vide clearance for the latter; and the sweeping
tools presenting a side surface to the material
to be swept; the arrangement being such that
the cutting tools out progressively from the elbow
75 to the tail, and both the tail of the cutting tools
ible or articulated shaft I59, bevel gearing I66,
I6I at the foot of the vertical drive shaft I51,
and bevel gearing I62, I63 at the top of said
vertical shaft; the bevel gear I63 having a sprock 70
et I64 on its shaft connected by a chain to a
sprocket I65 on the shaft of the sprocket I53.
The bevel gears I62 and I63, and the sprockets
I64 and I65 are preferably enclosed in a casing
to exclude dirt.
., 2,467,619
[and the whole of the sweeping tools move the out
a material towards‘ the centre of the rotary cutter;
a conveyor mountedon said frame and inclining
‘ ‘1,004,616
from said rotary cutter to a delivery‘point at the
end of said frame; opposite to said rotary cutter; a 5
~ power plant associated with said frame; and pow
' er transmission means through which thecutter,
the conveyor, and the machine as a whole,‘ can
driven‘from said power plant.
1,346,679 ‘
The following references are of record in the 15
file of this patent:
Aasland __________ __ Oct. 3,
P?le ..;. __________ __ Aug. 12,
Carr _____________ _- Aug. 3,
Peltier ___________ -.. Jan. 1,
Pratt ____________ __ July 13,
Gilman __________ .._ July 25,
Sanders __________ _.. Feb. 2, 1926
Nelson et a1 _______ __ Mar. 20, 1928
Muffett __________ __ Nov. 19, 1929
Snyder __________ _.. Apr. 15, 1930
Nelson et a1 _______ __ June 17, 193
Roller _____ _'.._____ June 24, 193
Haiss ____________ __ Feb. 3, 1931
Miller, Jr _________ __ May 19, 1931
Veneziano ________ __ July 4, 1944
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