вход по аккаунту


Патент USA US2107120

код для вставки
Feb. 1, 1938.
Filed Sept. 16, 1956
2 Sheets-Sheet l
W/'///'5 /—/. You/7f
‘ w 1. W
Feb. 1, 1938.
‘ 2,107,120
Filed Sept. 16, 1956
2 Sheets-Sheet 2
//Z//'///'5 /'/. Vaun/
v 2,107,120"
Patented Feb. 1, 1938 -
Willis 11. Yount, Oakland, Calif., assignor to
American Tractor Equipment Corporatioma
corporation of California
Application September 1c, 1936, Serial No. 101,113
5 Claims.
This invention relates to a new, and improved
scraper structure and, more particularly, .to an
improvement upon that large earth carrier and
scraper structure shown in the copending appli
cation of'John F. Knapp, Serial No. 58,552 of
‘January 10, 1936, and Robert B. Price, Serial No.
80,726, of May 20, 1936.
1 _
The present invention is concerned with an im
proved mechanism for controlling the scraper
blade elevation and‘ for operating the bowl clo
sure- means. While the machines of the afore
mentioned applications were successful, the pres
ent structure is much more rugged. and, at the
same time, simpler in construction.
It is an object of the present invention to sim
plify further the operating mechanism for the
hearing it connects the other link ends to mem
ber it. Another pair of links II are connected
at the top of the post by shaft SI and to the
upright H by shaft 32. The links 2‘! and "pro
vide a parallel linkage connection between the
scraper frame and the front truck post 26.
Wheels 36 are provided at the rear of the frame
in pairs, each pair being mounted upon an axis
31, each axle being carried in. the supporting
members ll.
The‘ bowl ‘
Secured to the frame members i! are suitable
side plates 4| .
Between these side plates are ex.
tended a bottom plate 42 and an arcuate plate 43. 15
At their forward ends these plates are joined to
gether and thus provide a lip “to which is at
tached a suitable cutting blade 46, bolts 41 being
bowl closure means, particularly to the end that
the bowl closure means can beoperated by only , usually utilized forthis purpose so that the cut
a single cable in a large capacity carrier-scraper. ting blade can bereadily changed or replaced.
It is an object of the present invention to sim
Upon advancing the scraper over the ground
20 plify the elevating mechanism on a cable oper
the cutting blade 48 will cut on and pick up earth,
ated scraper structure, to provide a simple and - this earth being deposited upon the arcuate plate
yet rugged structure.
43 to be retained therein. ‘
The invention includes other objects and fea-,
Since the‘ point at which it is desired to dump
tures of advantage, some of which, together with a load from the scraper may bea considerable 25
the foregoing, will appear hereinafter, wherein distance from the point at which the load is ,
' the present preferred scraper structure of my
invention is disclosed. In the drawings accom
picked up, since transportation of the load may )
result in accidental discharge of a part thereof,
panying and forming a part of this speci?cation. I provide means for retainingthe earth in the
Figure 1 is a side elevation partly in section of ' howl.‘ This means is shown as comprising two 30
a scraper structure embodying my invention.
Figure 2 is a plan view, partly in section.
' .
Figure 3 is a section illustrating the detail of
construction at the ‘hinge forming point.
The frame
The scraper of the present invention includes
a strong steel frame H made up of a plurality
_ of members, usually secured together. by spot
40 welding. This frame includes side member l2,
end members It, and aforward'member 14.. This
member joins the side members I! and extends
forwardly to‘provide a support for hearing It
and forwardly extending uprights I ‘l.
arms 55 carried upon stub shafts '58 which are
in turn carried by brackets 49 on side frame
members l2. 'i'hesev arms extend forwardly and
provide a hoe-like door structure with transverse
plates II and II which are welded between the
arms II. It is to be noted that plate 5| engages
the cutting blade and thus insures a tight closure _
for the bowl.
To provide for removal ‘of earth carried upon
the bowl I support another pair of arms 6! from
stub shafts l8 and extend between these arms an '
and gate in the form of a plate .2. His to be
noted that the center of curvature of the arcuate
plate 43 is the center of'the stub sh'afts 48 and
A front truck ll, including an axle ll upon ' that plate 62 will sweep over and wipe-off- earth 45
45. which are positioned wheels 2!, is provided to
permit steering of the scraper. A draw bar 22
extends forwardly to ,be attached to a suitable
bitch on such a vehicle as a tractor used to propel
the scraper. The axle l0 carries a ball member
28 which is received in a socket 24 at the bottom >
of a post it. This post extends upwardly and
is connected to member It by a pair of links 21
engaged with the post by shaft 28 intermediate
55theendsofthepost. Ashaftllinsertedin
upon the plate 43 so that the bowl can be readily '
The blade elevating mechanism
‘ Means are provided for ‘raising and lowering
the frame it so that the position of the cutting
blade 46, relative to the earth, can be adjusted;
In the form disclosed this means comprises a”
pulley structure ll supported upon a pin 12 car 55/
1 ried by rearwardly extending arm ‘II on the post
.26. A second pulley structure indicated at." is
supported upon the end of member H. A cable
II is secured to the frame of pulley ‘II and is
extended about the several'pulleys to secure a
multiplication in the power applied on cable 18.
This‘cable extends over a. guide pulley ‘I‘I carried
on one side of post It and about a guide pulley
19 positioned by support II for universal move-_
ment. The pulley extends to a suitable hoist
; 1o
which it appears in Pig. 1 with the scraper blade
in contact with the earth, the door being raised
to the position shown in the dash lines. When
the closure means is to be lowered, the operator
simply releases. the tension upon cable 85, the
weight of the closure means causing it to drop
into the full line position and plates ii ‘will be
in engagement with the cutting blade 46 while'
mechanism, usually a hoist at the rear of a
arms I! are above the dirt in the bowl.v If cable
18 be pulled to bring link pairs 21 and 30 to
gether, the blade will be raised above the earth
. The closure and end gate operating mechanism
ill and Si being lowered into position. Normally
the scraperis operated in about that position in
In accordance with this invention, a very sim
ple and yet practical form. of cable operating
mechanism'is provided for the door and the end
sate structure.
An offset arm 82 extends rear
wardly from the upright I‘! which is carried by
20 the forward part of the frame portion H. The
and the load carried.
when it is desired to dump the load the opera 15
tor operates the hoist pulling-on cable 85. This
results initially in a. lifting of the door or closure
means. During the initial movement of the clo
sure means the end gate will not be moved. How
ever, continued pulling on cable 85 results in 20
arm 82 carries a multi-groove pulley 88 carrying . continued rotation of the arms 45 and rotation
a cable 85 which extends ‘forwardly over guide
pulley 88 on extension I‘! and through a guide
pulley I‘! on the other side of post I! to another
guide pulley 88 on extension 8! tea suitable ca
ble operating mechanism on the tractor. The
cable .85 is extended between the multi-groove
pulley 83 and a like pulley It, the end of the
cable being secured to the frame adjacent pulley
30 II.
The pulley 89 is supported in a link struc
ture 80 which in turn is carried by a shaft II on
,the end closure or door. Plates II and ii are so
connected that a recess is provided between them.
The link structure permits raising of the door
35 to the maximum height, enabling the pulley ll
' to swing out clear of the door as it is raised.
It is to be noted that arms ii each include an
outwardly extending extension ill thereon and
that from each of arms 45 an ear Ill projects
40 over each of the extensions Ill so that arms I!
7 can only be moved a limited distance before ears
III engage the extension ill. Thereafter, fur
ther rotational movement of arms " about the
stub shafts will result in a rocking of the end
45 gate ‘I! over the base of the bowl until ?nally
the end gate is in the dot line position shown in
Figure l, and the closure means, including arms
II, have been moved to the extreme or upper
most position in which they appear in dotted
lines in Figure 1.
of closure 62. This ‘gradual raising of the clo
sure means brings it into that position in which
it appears in Figure l, well elevated above the
bowl and the-closure 82 into a position wherein
all-dirt has been swept oil the bowl.
During the movement of the end gate the
spring has of course been placed under "tension
so that, upon the operator releasing the 1cable II,
the end gate 62 is returned while the1 weight of
the closure means causes it to rotate about the
‘stub shafts and return to the full line position
in which it appears in Fig. 1_. The operator usu
ally stops the fall of the door when it is in an in
termediate position and spaced from the bowl so
that earth can be scraped up and gathered in the
It is to be pointed out that the load on the dirt
moving gate is substantially uniform. Thus
when the gate is first moved the load is made up
of dirt on the bowl and little if any power is de
manded by the spring. As the dirt is forced out
over the cutting edge the dirt load decreases but
more power is demanded by the spring. This
results in a uniform loading on the cables. The
door position enables the operator to judge the
operation of cleaning the bowl accurately.
I claim:
1. A scraper comprising a bowl, means for dis
' charging dirt therefrom including a gate sup
To provide for the return of the end gate I ported above said bowl and movable thereover
extend a spring Ill in the frame it transversely . to dischargedirt, thereon, closure means for said
on the scraper bowl so as to secure a goodly length
bowl hinged above said bowl and movable from
thereof. A piston “I engages an end of this abowl closing‘ position to a raised position above
spring and to this piston is attached a cable I N. the bowl, said closure means including arms ad 55
This cable isextended to theend gate about suit
jacent each side of said bowl, means extending
able guide pulleys I" so that when the end gate is from said gate and engaging said arms only after
moved forward it is only against the bias of the opening movement. of said closure means, and '
spring so that the spring always urges the and means for moving said gate including a pulley
gate to return to that position in whichv it ap
carried by said gate, a pulley supported above
pears in Figure 1.
said gate and a cable extended between said
, While it is‘ believed that the operation of the
2. In a scraper, a frame providing an opening,
wheels at the rear end thereof, means supporting
structure is relatively clear from the foregoing the front end of said frame, a bowl carried by
description, it will be again pointed out upon a - vsaid frame and extending from in front of said
pulling of cable ‘ii, a raising and lowering of the wheels toward said frame front end, an end gate
cutting blade relative to the edge can be secured for ejecting dirt from'said bowl, a door for clos
the cable passing over suitable pulleys provided ing said bowl supported for hinged travel from a >
70 between the frame of the scraper and the post 26, vbowl closing position to a raised position, means
to raise and lower the two pairs of links relative supporting said gate over said bowl, a pulley on
to each other.
said door, a second pulley carried adjacent said
As to operation of the bowl, once the bowl is‘ frame front end, a, cable extended between said
filled itis raised relative to the earth, the door pulleys for lifting said door, and means connect
15 or closure means provided by anns II and plates ing‘said
gate to said door to move said gate con-J 75
currently with said door at least during a por
tion of the travel of said door.
3. In a scraper, a frame having a front end, a
bowl mounted on said frame to the rear of said
front end, a door for closing said bowl including
a bowl engaging portion and a forwardly and up
ward‘ly extending portion supplementing said
bowl as a dirt carrier, a first pulley on said door
adjacent said forward end, a second pulley car
ried on said front end above said bowl, a cable
extended between said pulleys, and a link hinged
on said door adjacent said bowl engaging por
tion and interposed between said door and the
?rst pulley to swing said pulley free of said door
upon lifting of said door.
4. In a scraper, a frame having a front end, a
bowl mounted on said frame to the rear of said
front end, a door for closing said bowl and mov
able from a bowl closing to a bowl opening posi
20 tion, a ?rst pulley carried by said door, a second
pulley carried on said front end, a cable extend
“ing between said pulleys to lift said door, a gate
positioned above said'bowl, and means inter
engaging said gate and said door to move said
gate with said door-only after initial movement ‘
of said door away from said bowl.
5. In a scraper, a dirt carrying bowl having a
cutting blade to cut and deliver dirt to said bowl,
9. door supplementing said bowl and including a
blade engaging portion and an extending por
tion providing a supplemental bowl portion when
said door is in blade engaging position, a gate
movable over said bowl to eject dirt therefrom, 10
means connecting said gate to said’door for con
current movement with said door at least during
a portion of the travel of said door, a link hinged
on said door adjacent the blade engaging'portion
of the door, said link extending along said door
in’a recessed portion of the door, a pulley on the
link, a second pulley, means supporting said
second pulley elevated above said door in blade
engaging position, and a ?exible element trained
over said pulleys and movable to lift said door
until said link swings out of said recessed por
Без категории
Размер файла
464 Кб
Пожаловаться на содержимое документа