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Патент USA US3048296

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Aug- 7, 1962
A. R. BIEDESS
3,048,287
ROCK LOADING MACHINE
Filed June 15, 1961
2 Sheets-Sheet 1
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RNE YS
Aug- 7, 1962
A. R. BIEDESS
3,048,28?
ROCK LOADING MACHINE
Filed June 15, 1961
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IN VEN TOR.
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3,048,287 '
Patented Aug. 7, 1362
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My invention has’as its, principal‘ objects to simplify
‘3,tl4~8,287
the fluid pressure system for elevating‘ the‘ boom stru‘cf 1
tures of rock loading machines, assuring the‘ digger bucket
return to a pre-set gathering position at the end of each
loading position and accommodating vfree upward move
ROCK LOADING MACHINE
Anthony R. Biedess, Chicago, Ill., assignor to Goodman
Manufacturing, Company, Chicago, Ill.,'a corporation
of Illinois
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ment of, the boom structure, as ‘the digger bucketv‘is ‘
Filed June 15, 1961, Ser. No. 117,389 > ,
moved to a ‘discharge position, by providing “a ?oating
elevating connection for the boomstructure‘,‘ elevating
the boom structure and accommodating free elevating
5 Claims. (Cl. 214-90)
This invention relates to improvements. in rock‘loading
machines and more particularly relatesto an improved 10 movement of the boom structure as ‘the digger bucket
moves to its discharge position.
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boom support for supporting and elevating the digger
A further object of ‘the. invention is to provide “an
bucket into various desired digging positions.
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' In rock loading machines of the type where the digger
bucket discharges directly onto a conveyor and is‘pivot
ally supported ‘on the forward end of a boom structure, 15
and depends therefrom into engagement withthe'pground,
to be crowded along the ground to pickup aload ‘of
improved elevating means for the ‘boom structure‘of a
rock~loading machine, in which a digger bucketjis‘pivote
ally supported on’ the front end. of. the‘boorn’ ‘structure
and depends therefrom into ‘engagement with the grouhd',
and extends in advance thereof, ‘accommodating the
digger bucket to roll along the front edge of'theghopper
rock or other loose material by advanceof the machine
for the elevating conveyor of the ‘machine andfr'eely'lift ’
and supporting ,boom structure for the "digger bucket
along the ground, the boom structure is vertically ad' 20 the boom structure as the'digger bucket rolls along'said
‘front edge of the hopperj'as it ‘moves to a discharge pen;
‘tion and‘ maintaining the digger bucket‘ "at "a selected
justed by ?uid pressure jacks. which iraise or lower the
digger bucket to position theleading'edge ofv the bucket
alongthe ground. It is desirable that the digger bucket
elevation for each gathering operation.
position with respect to ‘the ground'a'fter each loading
operation and that the digger bucket ‘discharge directly
a'rock loading machine having a diggeri'bucke't pivoted
therefrom, by supporting, the forward,‘ end{\_por,tion ‘of
the boom " structure on ‘elevating cylinders. and pistons,
30
ground, to preventthe machine from '_becoming'hu'ng up
on‘the conveyor during manipulation and transportation
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to the forward end of the boom structure anddepending
clearance between. the bottomv of the’conveyor and the '
of‘the machine from place to place.’
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25 upon the elevating mechanism for theb'oomv structure of .
into the elevating conveyorp'of the machine inorder to
avoid spillage‘. and tov facilitate the {loading operation.
It is also necessary that the conveyor audits hopper be '
spaced a ,jsuf?cient distance above the ground to ‘provide
_ '
A still further'object of the invention‘ is to, 1mprove
when once adjusted return to substantially; the same
‘ '
In such machines, a hopper extends‘ across‘ the front \
end portionfand along opposite sides of the conveyor
and ‘by providing a free extensible supporting connection
between the elevating cylinders‘ and pistons and theboom
structure,'maintain_ing the digger bucket in" a preselected
position with‘ respect? tofthemground, for- each gathering
operation and; ‘accommodating. free vertical .mevement I
'of' the boom structure with ‘respect to the elevating cylin
ders" and pistons as the, digger bucket is moved to a ‘dis
to retain the loose rock onto the conveyor, ‘and the dis
charge end portion of the digger bucket moves into the
'char‘geposition.
‘ These and other objects
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_ of ~ the
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ihventionwill.
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appear
hopper along the front edge thereof so, as to discharge
from time ‘to time‘as the following speci?cation proceeds
and with reference to the accompanying drawings where
itsvload as close to the conveyor as possible. With this
arrangement, as'the digger ‘bucket is moving to a dis
charge po~sition,.it rolls along the front upper edge of _'
the hopper, with the result that the linkage mechanism
elevating the digger bucket raises the boom about its
axis of connection to the main frame of the machine 45
by the reaction of the digger bucket along the front of
the hopper.
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.Where extensible power members are used to elevate ‘
‘in:
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FIGURE 1 is a fragmentary view.- ‘in side elevation
of a rock loading machine constructed in accordance
with the invention, showing the digger bucket int-position ,
to be crowded into the material tobeloaded in solid,
and showing the digger bucket in its discharge-position
by broken lines, with the supporting boom structure for
the digger bucket shown by broken lines in the elevated
the boom structure supporting the digger bucket, and to
position it assumes as the digger bucket moves to its
,
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retain said boom structure in various positions of ele 50 discharge position; and
vation, and where the extensible power means is a pair
FIGURE 2 is a cross-sectional view takenv through a
of vertically extending cylinders and pistons extending .,
form of hydraulic jack. that may be ‘used to holdv the
along’ opposite sides of the hopper for the conveyor ‘and
boom structure supportingthedigger bucket'in‘a desired
vpivotally connected with the boom structure, the vacuum
position of adjustment and to elevate and lower'the
created in the cylinders by the attempted lifting of the 55 boonrstructure as required, ‘showing theijack'in the
boom structure by the digger bucket, will hold the boom
position it will assume as the digger bucket elevates“ the
structure from‘ moving upwardly as the digger bucket
boom structure'with respect to the jack,‘ as the digger
moves to its discharge position with the result that addi
bucket reaches its discharge position‘.
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tional valves must be provided in the ?uid pressure
In the embodiment of theinvention illustrated ‘in FIG
system supplying ?uid pressure to the, cylinders, to re 60 URE 1 of the drawings, the machine generally includes
lieve this vacuum and accommodate free vertical move
ment of the boom structure as the digger bucket moves -;
to its discharge position.
.
a main frame 10 mounted on rubber tire mounted trac
tion wheels 11, propelling the machine along the ground
and crowding a-digger bucket 12 on the, forward end
Where additional valves arev provided to relieve this
of a supporting and elevating boom structure 13' into the
vacuum, and particularly check valves allowing ?uid to 65 material to be loaded. The traction wheels 11 maybe
be drawn into the bottoms of the cylinders, the ?uid
driven in a manner similar to that shown and described
drawn into the cylinders is trapped by the check valves
in my application Serial No. 9,501 ?led February 18,
and will not permit the bucket to resume its proper
1960, and entitled “Rock- Loading Machines” so. not
mucking position. The boom structure must thus be
' herein be shown or described further.
adjusted to position the digger bucket at the proper 70 An inclined elevating conveyor‘15 ‘extends along the
gathering position with respect to the ground at the end
main frame 10 from the forward end thereof and over
of each loading operation.
the top of said main frame for elevating the material
3,048,287
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loaded thereon by the digger bucket 12, and discharging
Suitable valves (not shown) are provided to control
the loaded material onto a suitable material transporting
the admission and release of ?uid under pressure to the
head and piston rod ends of the cylinders 55 to extensi—
means, such as a truck, a conveyor or the like.
The
elevating conveyor 15 may be of any well known form,
such as a chain and ?ight conveyor like that shown in
my application Serial No. 10,715 ?led February 24, 1960,
and entitled “Loading Machine” and may be driven by
a suitable motor. The elevating conveyor 15 has a hop
bly move the piston rods 56 and initially pivot the digger
bucket 12 upwardly by engagement of the engaging end
portion 44- of the bellcrank 41 with the stop 45 and to
then move said digger bucket to a discharge position by
the direct pull of the link 49 on the upstanding arm 46
per 16 extending along opposite sides thereof having the
of the ‘bellcrank 41, to move the digger bucket to the
usual outwardly ?ared side plates and connected together 10 discharge position shown by broken lines in FIGURE 1,
at the forward ends thereof by an end plate 17 extending
across the conveyor 15. The end plate 17 has a lip 19
which may be in the form of a hardened rod, extending
along its upper end portion and engaged by a rear wall
20 of the digger bucket 12, as the digger bucket moves 15
as has been more fully described in my aforementioned
application Serial No. 10,715, so not herein shown or
described further.
As the digger bucket is moved to its discharge posi
tion by the direct pull of the link 49 on the pivot pin 43
upwardly to its discharge position.
through the bellcrank 41, the rear wall 20 of the digger
The boom structure 13 supporting and elevating the
bucket comes into engagement with the lip 19 and rolls
digger bucket 12 includes parallel spaced boom arms 21,
over said lip during the initial movement of said digger
extending along each side of the hopper 16 and beyond
bucket to its discharge position, and then lifts the boom
the forward end thereof and connected together at their 20 structure 13 by the sliding reaction of the rear wall 20
forward ends by a cross-tube 22 as in my aforementioned
of the digger bucket 13 on the lip 19, as the digger bucket
application Serial No. 10,715.
is moved to discharge its load onto the conveyor 15,
The boom arms 21 are pivotally mounted at their
the elevated position of the boom being indicated in FIG
rear ends on the outsides of the hopper 16 on pivot pins
URE 1 by broken lines A.
23, mounted on blocks 24 and extending inwardly there 25
Referring now in particular to the elevating means
from toward the hopper 16. The blocks 24 are welded
‘for the boom structure 13 .for elevating and retaining the
or otherwise secured to a support structure 25 extending
digger bucket 12 in various elevated positions with re
upwardly from the main frarne10 along opposite sides of
spect to the ground, the hydraulic jacks 29 each include
the‘hopper 16.v The pivot pins 23 also ‘form pivotal
a cylinder 65 having a piston 66 therein having a piston
mountings for actuating levers 27 for the bucket 12.
30 rod 67 extending from said piston through an end cap
Each boom arm 21 is adjustably supported adjacent
69 therefor, for extensible and retractible movement with
the forward end portion of the conveyor 15 on a hy
respect to the cylinder 65, upon the admission or re
draulic jack 29 having a ?oating or freely extensible sup
lease of ?uid under pressure to or from ‘a head end
port rod 30, shown in FIGURE 2 as ‘being threaded
70 of said cylinder, through a pressure pipe 71, under
through a transverse pin 31 pivotally mounted at its ends 35 the control of a valve 73. The cylinder 65 has trunnion
in parallel spaced arm portions 32 and 33 of the boom
pins 74 extending therefrom, trunnioned in a bracket
arm 21. The inner arm portion 33 of the boom arm 21
75 extending ‘forwardly of the main frame 10.
has a depending leg portion 35 extending inwardly of the
A return line 76 leads from the piston rod end of the
hydraulic‘ jack 29 having slidable bearing engagement
cylinder 65 and serves as a vent line venting the piston
with a bearing plate 36 extending vertically along the 40 rod end of the cylinder 65 and accommodating free ver
tical movement of the piston 66 upwardly along the cylin
outer side of the hopper 16, and forming a slidable hear
ing connection between the boom arm 21 and the hop
per 16.
The digger bucket 12 is transversely pivoted to the
der 65 upon the admission of ?uid under pressure to
the head end of said cylinder, and free downward move
ment of said piston and the 'boom structure 13 as well as
forward end portion of the boom structure 13 on laterally
the digger bucket 12, upon the release of ?uid under
spaced cars 37, extending rearwardly from side walls 39 45 pressure from the head end of said cylinder.
The piston rod 67 has a hollow portion 77 opening to
of said digger bucket. The ears 37 are pivotally mounted
the upper end thereof and having a bushing 78 for the
on transverse pivot pins 40 at the forward upper end por
support rod 30 mounted in its upper end. The ?oating
tion of the boom structure 13.
support rod 30 slidably extends through the bushing 78
A bellcrank 41 is pivotally mounted on each side wall
39 of the bucket 12 on a pivot pin 43. The bellcrank 50 and has an enlarged head 79 at its lower end, slidably
engaging the wall of the hollow portion 77 and abutting
41 has a depending arm or leg having an engaging end
the bottom of said hollow portion when ?uid under pres
portion 44 engageable with a stop member 45 extending
sure is admitted to the head ends of the cylinders 65, to
outwardly of the side wall 39. It will be noted that the
elevate the boom structure 13 and bucket 12.
engaging end portion 44 engages beneath the stop 45 to
accommodate ‘the digger bucket 12 to freely pivot up
Thus, as fluid under pressure is admitted to the head
wardly about the axis of the pivot pins 40 as said digger
ends of the cylinders 65 to pivot the digger bucket 12
bucket rides over irregularities in the ground, when it is
upwardly into a discharge position and as the rear wall
‘being crowded into loose rock or the like during the
20 of the digger bucket engages the lip 19 extending
loading operation. The bellcrank 41 also has an up
across the front of the hopper 16‘, and rolls along said
wardly extending lever arm 46 having a clevis 47 of an 60 lip, the reaction of the digger bucket against the stationary
adjustable link 49 pivotally connected to its upper end
lip 19 will effect elevation of the boom structure 13
on a pivot pin 50. The opposite end of the adjustable
from the solid line position shown in FIGURE 1 to the
link 49 from the bellcrank 41 has a clevis 51 threaded
broken line position A shown in this ?gure. During
thereon and extending along opposite sides of the actu
this movement, the ?oating support rod 30 will be ex
ating lever 27 and pivotally connected therewith on a 65 tensibly moved along the hollow portion 77 of the piston
pivot pin 53. The actuating lever 27 is actuated by a
rod 67, accommodating free vertical movement of the
hydraulic cylinder 55 having a piston rod 56 extensible
boom structure, and thereby accommodating the digger
therefrom. The hydraulic cylinder 55 has a connector
bucket 12 to move with its discharge end within the hop
57 extending from its head and between the arm por
per 16 to the discharge position shown by broken lines
tions 32 and 33 of the boom arm 21 and pivotally con
in FIGURE 1.
nected thereto on a pivot pin 59. The piston rod 56
As the digger bucket is moved downwardly to the load
extends between connector plates 60 welded or otherwise
ing position shown in FIGURE 1, ?uid under pressure
secured to opposite sides of the actuator 27 intermediate
is admitted to the piston rod ends of the cylinders 65,
the ends thereof, and is pivotally connected to said con
relieving pressure of the digger bucket from the lip 19,
nector plates as by a pivot pin 61.
75 and accommodating lowering movement of the boom
3,048,287
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ally connected with said boom, a vertically movable sup
structure from’ the broken line position A shown in {FIG
URE 1 to the solid line position shown in this ?gure.
port for said member,‘ and an extensibly movable connec- .
During movement of the digger bucket the support rods
30 move downwardly alongvthepiston rods 61, until the
'tion between said member and said support accommodat
ing free upward movement ofv said vertically movable 7
head ends 79 thereof come into engagement with the
bottoms of the hollow portions 77 of said piston rods.
The support rods 130 will then remain in this position
member with respect to‘ said support as the discharge end
portion of said digger bucket engages said hopper, accom
modating free movement of said boom vertically with re
spect'to' said support into a discharge position within said
hopper and retaining said boom structure and digger‘bucket
in a preselected position with respect to the ground for
during the gathering operation, and during adjustable
movement of the boom structure by the hydraulic jacks.
It may be seen from the foregoing that an improved
‘form of supporting arrangement for supporting and ad
justing the digging elevation of the digger bucket 12
each gathering operation.
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3/ In a rock loading machine, a-mobile main frame, ‘a
has been provided, in which a floating connection is pro
conveyor extending along said main frame from the for
ward end thereof and having a hopper extending along op
vided between the pistons of the hydraulic jacks and the
boom arm structure, maintaining the digger bucket in a 15 posite sides of said conveyor and across the forward end
of said main frame, a boom structure transversely pivoted
preselected position with respect to‘ the ground for each
gathering operation and accommodatingeelevating move
to said main frame rearwardly of the forward end thereof
and extending along opposite sides of said hopper forward
ly of the forward end thereof, a digger bucket extending
charge position, and thereby accommodating the posi 20 in advance of said boom structure and transversely pivot
ed to the forward end of said boom structure and depend
tion-ing of the forward end portion of the hopper for the,
ing therefrom and having a discharge end portion extend
conveyor to be arranged closely adjacent the digger
ment of the boom arm structure with respect to the
hydraulic jack-s, as the digger bucket moves to its dis
bucket, and accommodating the digger bucket to move
Within the hopper to discharge it load onto the conveyor
entirely within the hopper, without spillage.
While ‘I have herein shown and described one form
in ‘which my invent-ion may be embodied, it may readily
be understood that various variations and modifications
ing above the axis of connection of said digger bucket to
said boom structure when said digger bucket is in a load
ing position along the ground, and movable within said
hopper when said digger bucket is in a discharge position,
actuating mechanism for said digger bucket for lifting said
digger bucket from a loading position along the ground into
a discharge position with its discharge end portion within
in the invention may be attained without departing froni
said hopper, comprising at least one cylinder and piston
the spirit and scope of the novel concepts thereof, as
30 pivotally connected to said boom and a leverage and link
de?ned by the claims appended hereto.
1 claim as my invention:
age connection between said cylinder and piston and said -
1. In a rock loading machine, a mobile main frame,
a conveyor extending ‘along said mainframe from the
digger bucket, at least one hydraulic cylinder'and piston
supporting said boom structure and vertically moving said
forward end thereof and having a hopper extending along
boom structure about its axis of pivotal connection to
said main frame, and a ?oating connection between said
opposite sides thereof and across the forward end there
of, a boom transversely pivoted to said frame and extend
cylinder and piston and‘said boom structure vertically
pivoting said boom structure and digger bucket by com
pressive engagement between said ?oating connection and
ing forwardly of the forward end thereof, a digger bucket
transversely pivoted to the forward end of said boom
and extending in advance thereof and depending there
from into engagement with the ground, extensible power
‘movement of said boom structure with respect to said
means, and a link and leverage connection between said
extensible power means and said digger bucket for piv
portion‘ of said digger bucket along the front of said ‘
said boom structure and accommodating free upward
cylinder and piston by the reaction of the discharge end
otally moving said digger bucket upwardly to a loading
position with its discharge end movable within said hop
hopper, and thereby accommodating said digger bucket
tion with said boom, moving said boom upwardly by the
4. In a rock loading machine, a mobile main frame, a
conveyor extending rearwardly along said main frame, a
to move with its discharge end portion within said hopper
per, other extensible power means for moving said boom 45 to discharge the loose material thereto and supporting said
‘ boom structure and digger bucket in a preselected position
about its axis of connection to said frame, said last men
with respect to the ground for each gathering operation.
tioned extensible power means having a ?oating connec
compressive forces between said extensible power means
and said boom, accommodating free upward movement
of said boom independently of said extensible power
means, effected by engagement of said digger bucket with
said hopper as it moves to a discharge position, and select
hopper extending along opposite sides of said conveyor and
across the forward end thereof, said hopper having a
bearing lip extending across the forward end thereof at
the upper end portion thereof, a boom transversely pivoted
ing the gathering position of said digger bucket.
to said frame rearwardly of the forward end thereof and
2. In a rock loading machine, a mobile main frame,
a conveyor extending along said main frame from the for
extending forwardly of the forward end thereof beyond
ward end thereof and having a hopper extending along
ing in advance of and transversely pivoted to the forward
the forward end of said conveyor, a digger bucket extend- .
' opposite sides of said conveyor and across the forward end
end of said boom and depending therefrom into a loading
thereof, a boom transversely pivoted to said main frame
and extending forwardly of the forward end thereof, a
digger bucket extending in advance of saidv boom and
transversely pivoted to the forward end of said boom and
position into engagement with the ground, and having a
60 a discharge end portion extending above the axis of con
depending therefrom for engagement with the ground and
having a discharge end portion extending above the axis
I nection of said digger bucket to said boom, and having a
rear end wall engageable with said bearing lip, at least one
hydraulic cylinder and piston transversely pivoted to said
boom intermediate the ends thereof, and a linkage and‘
of connection of said digger bucket to said boom, ex 65 leverage connection between said hydraulic cylinder and
piston and said digger bucket for‘ moving said digger
tensible power means pivotally mounted on said boom, and
bucket into a discharge position with its discharge end
a link and leverage connection between said ?rst exten
within said hopper, at least one hydraulic cylinder and
sible power means and said digger bucket for pivotally
moving said digger bucket upwardly into a discharge posi
piston transversely pivoted to said main frame adjacent the
tion with its discharge end within said hopper and over
70 forward end thereof and extending upwardly from the
point of connection of said hydraulic cylinder and piston to
said main frame, said last mentioned hydraulic cylinder
and piston including an extensible connecting rod trans
versely pivoted to said boom at its upper end and vertically
75 moving said boom by v‘compressive engagement between
' lapping the front of said conveyor, second extensible
power means connected between said main frame and
said boom for vertically moving said boom about its axis
of connection to said main frame, said second extensible
power means including a'vertically movable member pivot
3,048,287
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said piston and connecting rod and accommodating free
ing therein, and includes a rod portion within said hollow
extensible movement of said connecting rod with respect
to said cylinder, to accommodate the rear end portion of
sible and retractible movement with respect to said rod
said digger bucket rolling along said bearing lip, to freely
lift said boom with respect to said cylinder and move with
its discharged end portion within said hopper and to sup
port the boom and digger bucket in a preselected position
with respect to the ground for each gathering operation.
5. A rock loading machine in accordance with claim 4
wherein the extensible piston rod includes a piston rod ex 10
tending vertically through the piston rod end of said cylin
der for extensible movement with respect thereto and' hav
ing an upwardly opening hollow portion- having a bush
portion slidably guided within said bushing for exten
portion, and having a lower enlarged head portion slid
ably guided within said hollow portion of said piston rod
and supported thereon during the gathering operation and
elevation of said digger bucket.
References Cited in the ?le of this patent,
UNITED STATES PATENTS
2,537,010
2,582,954
Andersen ______________ __ Jan. 9, 1951
Biedess ______________ __ Jan. 22, 1952
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