close

Вход

Забыли?

вход по аккаунту

?

Патент USA US3063690

код для вставки
Nov. 13, 1962
3,063,680
J. C. HELSEL, SR
FAIR LEAD ROLLER ASSEMBLY
Filed March 20, 1959
FIG.|
(JJ
20/
/
f3~23
INVENTOR.
Joseph C. Helsel,Sr.
BY
-
"aired
tates
ICC?
1
3,963,689
Patented Nov. 13, 1962
2
This invention relates to fair leads for excavating ma
with openings 21' to space said plates from main assem
bly 10 when the former are secured to the latter by
means of bolts 23 and nuts 24. Midway of the length
of each side plate there is provided an arm 25 extending
rearwardly from the aft edge thereof, each arm having
an opening mating with an opening in side plate 12 of
main assembly 10. Bolts 26 and 27 pass through plates
chines and more particularly to a fair lead roller assem
12 and arms 25 to secure roller assembly 11 to main
bly for reducing the wear on cables used in dragline
work and a method for converting a stationary guide
assembly of a fair lead to a roller type assembly.
Various fair leads, such as the Bucyrus Erie dragline
No. 88B or 54B, have been used in the past, which in
clude a pair of superjacent sheave wheels between which
a wire cable is trained by a pair of stationary hardened
steel guide blocks. -It has been found that this arrange
assembly 10.
3,063,680
FAIR LEAD ROLLER ASSEMBLY
Joseph C. Helsel, Sr., 613 Pine St., Philipsburg, Pa.
Filed Mar. 21), 1959, Ser. No. 890,880
4 Claims. (Cl. 254—190)
ment of parts produces a drag on the line and creates con
Side plates 20 are spaced by a lower plate 28‘ and an
upper plate 29 which are welded or secured in any other
suitable manner to the inner faces of the plates adjacent
the upper and lower terminals thereof. Lower and upper
plates 28 and 29 are each provided with spaced openings
adapted to receive the terminal portions of a pair of
like spaced roller shafts 30.
Referring to FIG. 5, it will v‘be seen that, at a point
siderable friction between the cable and guide blocks,
approaching its upper limit, each shaft 30 is enlarged
with subsequent damage to one or ‘both.
It is an object of this invention to provide a fair lead
roller assembly for eliminating drag on a cable trained
to provide a bearing seat 31. Bearing seat 31 in turn
issues into an enlarged terminal portion 32, a portion of
the extreme terminal of which is cut away at 33 to pro
vide a lock plate seat. Near the lower extremity of shaft
through the fair lead and reducing friction between the
cable and fair lead to an absolute minimum, thereby
inde?nitely prolonging the life of the cable and guide
assembly.
Other objects are to provide a fair lead roller assembly
adapted to replace a fair lead guide block assembly; to
provide a roller assembly which may be readily attached
to the main assembly of a conventional fair lead in a
minimum of time and with a minimum of e?ort; and to
provide a roller assembly, the ‘bearings of which are
sealed against the in?ltration of foreign matter and lubri
cated to facilitate rotation.
Other objects of the invention will be manifest from
the following description of the present preferred form
of the invention, taken in connection with the accom
panying drawings, wherein:
FIGURE 1 is a perspective view of a fair lead roller
assembly constructed in accordance with the present in
vention and illustrating its application to a fair lead;
FIGURE 2 is a fragmentary front elevational view of
the device of the present invention in operative position,
portions thereof ‘being broken away shown in section to
disclose details of construction;
30 there is provided an enlarged portion comprising a
bearing seat 34 similar to bearing seat 31. The lower
plate engaging terminal of shaft 31} is indicated at 35.
Each shaft 30 is adapted to extend through the longi
tudinal ‘bore 36 of a roller 37. Longitudinal bore 36
is enlarged at the upper and lower terminals of roller
37, as indicated at 38, to receive double roller ball
bearing assemblies 39, the outer sides of which are
shielded to keep out foreign matter which cable 19
gathers from the excavation. It will be noted, from FIG.
2, that lower ball bearings 39 rest upon collars 40 at
the locus of the shaft openings.
Referring now to FIG. 2, it will be seen that shafts
30‘ are so mounted between lower and upper plates 28
and 29‘ that lock plate seats 33 are in facing engage
ment with each other in order to receive a lock plate 41
secured to upper plate 29 by suitable means 42 to pre
vent rotation of shafts ‘30. It is further seen that en
larged section 32 is adapted to ?t through each opening
of upper plate 29 while bearing seats 31 and 34 engage
the inner peripheries of upper and lower hearing as—
semblies 39. Terminal portion 35- is adapted to pass
FIGURE 3 is a sectional view taken along the line
3—3 of FIGURE 2 looking in the direction of the ar
through each opening in lower plate 28.
It is further within the contemplation of the present
rows;
invention to provide a lubrication system for the ball
bearing assemblies. For this purpose, the upper and
lower terminals of shafts 30‘ are provided with grease
?ttings 43 and ducts 44 through which the lubricant
passes to the void between the outer periphery of shaft
30 and the wall of roller 37 de?ning longitudinal bore
36. This keeps ball bearing assemblies 39 lubricated
at all times during the roller assembly’s operation,
thereby reducing friction between shafts 39 and rollers
FIGURE 4 is an enlarged elevational view of a roller
forming a part of the present invention, portions thereof
being shown in section; and
FIGURE 5 is an enlarged elevational view of a roller
shaft forming a part of the present invention.
Referring now in greater detail to the drawing, there
is shown, in FIGURE 1, a fair lead comprising a main
assembly 10 and a guide assembly 11 detachably en
gaged with the main assembly.
Main assembly 10 is of conventional construction
and includes a frame comprising a pair of spaced parallel
plates 12 between which an upper pulley 13 and a lower
pulley 14 are rotatably mounted in journal members 15
and 16, respectively. The central aft portions of plates
12 issue into a hub 17 adapted for engagement with an
excavating machine, or the like. A cylindrical housing
18 extends rearwardly from hub 17, through which hous
ing a cable 19 passes.
The guide assembly 11 of the present invention com
prises a pair of vertically arranged spaced side plates
37 to an absolute minimum.
In converting a conventional fair lead, such as the
Bucyrus Erie 883 or 54B, to a roller-type fair lead, the
bolts which hold the fair lead guide blocks in position
are ?rst withdrawn to permit removal of the guide
blocks.
These bolts are the same as indicated at 23 and
26 in the drawing. Roller assembly 11 is then moved
into position with the openings in side plates 20 aligned
with the openings in parallel plates 12 of main assembly
10, after which bolts 23, 26 and 27 are reinserted. Nuts
24 are threadedly engaged with the bolts to complete
the operation. The whole conversion can be e?ected
20, each of which is provided with upper and lower
openings 21 located adjacent the rear edges of the plates.
within thirty minutes.
By use of the present method and apparatus, drag
Bar spacers, designated 22, are ?xed in any suitable man
ner to the inner faces of side plates 20' and are provided
the ease of rotation of the rollers, obviates the danger
over a solid bar is eliminated and the factor, taken with
3,063,680
4
of damage to the cable or fair lead. It has been found,
through actual use, that the fair lead roller assembly
ducts ‘being in communication with the voids between
the roller shafts and rollers.
of the present invention is responsible for prolonging
cable life more than 50%. This particular arrangement
of parts further prevents oscillation of rollers 37 on
3. In combination with a fair lead including a frame,
a pair of pulleys rotatably mounted on the frame in
spaced, uniplanar relation, and a cable adapted to be
trained between said pulleys; a fair lead guide assembly
shafts 30, thereby avoiding possible damage thereto.
?xed to- the pulley frame comprising vertical-1y arranged
spaced plates detachably connected to the frame in
opposed relation, spacer plates secured to, and extending
of rollers 37 affords a large lubricant reservoir so that
bearing assemblies 39 will remain lubricated, even if 10 ‘between, the inner faces of the vertically arranged spaced
plates adjacent the upper and lower terminals thereof,
the supply is not replenished for a prolonged period.
each of the spacer plates being provided with spaced,
Also, since the friction between the cable and roller
vertically aligned openings, roller shafts between said
‘assembly is cut to an absolute minimum, the same roller
vertically arranged spaced plates, the terminal portions
assembly may ‘be used for an inde?nite period of time
before replacement.
15 of each roller shaft being received in the spacer plate
openings, each of said roller shafts being enlarged at a
While I have herein shown and described a preferred
point approaching its upper limit to provide a bearing
embodiment of my invention, it is nevertheless to be
seat, said bearing seat issuing into an enlarged terminal
understood that various changes may be made therein
portion, a part of said terminal portion being cut away
without departing from the spirit and scope of the ap
pended claims.
20 to provide a lock plate seat, the roller shaft also being
enlarged at a point approaching its lower limit to provide
What I claim is:
With respect to the lubrication system, the space between
the outer periphery of shafts ‘30 and the inner peripheries,
a bearing seat, a stationary lock plate detachably en
1. In combination with a fair lead including a frame,
gaged with the upper spacer plate, the terminals of said
a pair of pulleys rotatably mounted on the frame in
lock plate being engaged with the lock plate seat of each
spaced, ‘uniplanar relation, and a cable adapted to be
trained between said pulleys; a fair lead guide assembly 25 of said roller shafts to prevent rotation of the latter,
guide rollers rotatably sleeved on said roller shafts in
?xed to the pulley frame comprising vertically arranged
spaced relation to said roller shafts and to each other,
spaced plates detachably connected to the frame in
and anti-friction ‘bearing assemblies positioned on the
opposed relation, spacer plates secured to, and extending
‘bearing seats of said roller shafts and engageable with
between, the inner faces of the vertically arrangedspaced
plates adjacent the upper and lower terminals thereof, 30 the inner periphery of said guide rollers, to facilitate
rotation of the latter.
each of the spacer plates being provided with spaced,
4. A fair lead assembly as set out in claim 2, wherein
vertically aligned openings, roller shafts between said
the terminals of said roller shafts are provided with
vertically arnanged spaced plates, the terminal portions
grease ?ttings and lubricant ducts, the lubricant ducts
of each roller shaft being received in the spacer plate
being in communication with the voids between the
openings, the upper terminal portion of each roller shaft
roller shafts and guide rollers.
being cut away to provide opposed lock plate seats, a
stationary lock plate detachably engaged with the upper
spacer plate, said lock plate being engaged with the
References Cited in the ?le of this patent
UNITED STATES PATENTS
lock plate seats to prevent rotation of the roller shafts,
rollers rotatably sleeved on said roller shafts in spaced
relation to said shafts ‘and to each other, ball bearing
assemblies interposed between said roller shafts and
rollers, to facilitate rotation of the ‘latter, and means for
shielding said ball bearing assemblies to keep out foreign
matter.
2. A fair lead guide assembly, as set out in claim 1,
wherein the terminals of said roller shafts are provided
with grease ?ttings and lubricant ducts, the lubricant
45
934,809
1,929,417
2,255,314
2,344,417
2,356,255
Holmes ______________ __ Sept. 21,
Fykse ______________ __ Oct. 10,
Graham ______________ __ Sept. 9,
Schmidt et al _________ .. Mar. 14,
Lichtenberg ________ __ Aug. 22,
1909
1933
1941
1944
1944
2,609,587
Kuljian __; ___________ _._ Sept. 9, 1952
2,660,382
2,868,505
Wilson ______________ __ Nov. 24, 1953
Gurley ______________ __ Jan. 13, 1959
Документ
Категория
Без категории
Просмотров
0
Размер файла
355 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа