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Патент USA US3064956

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Nov. 20, 1962
TAKEO NOJIMA
3,064,946 '
DRIVING APPARATUS FOR X-IOIST DRUMS
Filed Jan. 4, 1961
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INVENTOR.‘
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Patent 0 " 1C6
1
3,064,946
DRIVING APPARATUS FOR HOIST DRUMS
Taken Noiima, 542 Kosugi-cho 1 Gimme,
Kawasaki City, Japan
Filed Jan. 4, 1961, Ser. No. 80,669
2 Claims. (Cl. 254-185)
This invention relates to an apparatus for operating
3,654,946
Patented Nov‘. 20, 1962
2
rections. In order to facilitate the rotation of disc plate;
20 with respect to disc‘plate '23, a circular rail 24 is pro
vided on one face of the plate 20, and a plurality of
wheels 25 are mounted on the opposing face of plate 23
in a circular row for cooperative engagement with the
rail 24.
The disc plate 23‘ is rigidly connected to a plurality
of circumferentially spaced piston rods 26 extending in the
axial direction of shaft 2 and carrying pistons 27 at outer
paratus for selectively operating a plurality of hoist drums 10 ends. The cylindrical pistons 27 cooperate with circum—
ferentially spaced cylinders 28 mounted in a stationary
arranged in an axial line.
cylindrical frame 29. Each cylinder 28 is provided with
An object of the present invention is to provide an ap
pressurized oil inlet pipe 30 and exhaust pipe 31. The
paratus of the kind speci?ed in which the plurality of
a row of hoist drums, and more particularly to an ap
hoist drums are selectively operated by a common through
pipes 30 and 311 are connected to a remote oil pressure
Another object of the present invention is to provide
a central control station remote from the hoist drums 1.
shaft from a common driver such as an electric motor or 15 system which is not shown in the drawings. The control
device of the oil pressure system may be disposed in
internal combustion engine.
'
an ‘apparatus of the kind speci?ed in which means are
provided for operatively connecting any of the plurality
The disc plate 20 carrying wedge elements 19 is urged
by circumferentially spaced springs 32 disposed between
of hoist drums to a common driving shaft effectively by 20 narrow ends of respective wedge elements and an annular
plate 33 ?xed to the inner side of sheave 11. The springs
a remote control.
.
act in an axial direction to release the clutch device
A further object of the present invention is to provide
fonned by wedge elements 19, ring 15 and disc 17.
ef?cient means for controlling and operating heavy hoist
In order to operate any particular drum 1, for example,
drums with minimum actuating power.
The invention will be best understood by reference to 25 the one shown in FIG. 2, oil pressure is supplied to cylin
ders 28 associated with that drum by appropriate opera
the following description and the accompanying draw
ings, in which,
tion of the remote control device to drive oil into the
cylinders via inlet pipes 30. Then, pistons 27 are driven
axially to the right as shown in FIG. 2 to urged wedge
FIG. 2 is a detailed view of one hoist drum and asso 30 elements 19 against the conical surfaces 16 and 18 of
clutch members 15 and 17 through disc plates 20 and 23.
ciated mechanisms, partly in longitudinal section, partly
This results in a driving connection between the shaft
in side elevation and partly diagrammatic.
2 and the sheave 11. Since the sheave 11 is mounted
Referring to FIG. 1, a plurality of hoist drums 1 are
for rotation in the stationary frame 14, its weight is car
rotatably mounted about a common through shaft 2 sup
ported for rotation in a suitable number of bearings 3. 35 ried by the frame rather than by the shaft 2'. The ar
rangement described makes it possible to drive all drums
The hoist drums 1 thus form a row along a common
1 by means of a long shaft of smaller diameter than would
axial line. Each drum may serve, for example, to hoist
otherwise be necessary if the shaft bore the weight of
open a gate of a water storage dam and to close the same
the drums.
for controlling water level in the dam.
FIG. 1 is a block diagram showing a general arrange
ment of one embodiment of the present invention; and
When the clutch device members 15-47-19 are en
The shaft 2 carries at one end a pulley 4 which is driven 40
gaged, the disc plate 20 begins to rotate relatively to the
by an electric motor 5 through a driving belt as illustrated.
Referring to FIG. 2, each drum 1 comprises a cylin
drical sheave 11 provided at or near opposite ends with
disc plate 23. This relative rotation is effected with least
friction by the rolling engagement of wheels 25 with rail
24. When the oil pressure is released from cylinders
28 through oil outlet pipes 31, springs 32 urge the wedge
elements 19 out of engagement with clutch surfaces 16
and 18, and the particular hoist drum 1 is released from
driving connection with shaft 2.
annular rails 12. Each rail engages a plurality of bearing
wheels 13 arranged in circular rows within annular frames
14 ?xed on a suitable stationary framework, not shown.
With the above arrangement, the drum 1 is appropriately
guided for its rotation about the shaft 2.
Each drum may be provided with an automatic stop
Each drum 1 is provided inside thereof with an an
nular connector ring 15 ?xed to the inner cylindrical face 50 mechanism for limiting rotation of the drum to a pre
determined number of revolutions. In the embodiment
of the sheave 11 and having a frusto-conical inner pe
shown, sheave 11 carries a circumferential gear 34 which
ripheral surface 16.
drives through a suitable gear train 35 a counter and
In radial registration with the connector ring 15, is a
switch device 36 which counts the number of revolutions
driving disc 17 rigidly mounted on the shaft 2. The disc
has a frusto—conical shape, whose outer conical surface 55 of sheave 11 and operates means, such as an electric
switch, to denergise the electric motor 5 when the drum
18 converges in one axial direction of the shaft 2, while
has rotated a predetermined number of revolutions. In
the conical surface 16 of connector ring 15 converges in
a gate control system for a dam, this arrangement would
the opposite axial direction of shaft 2. Thus there is de
prevent over-travel of a water gate driven by drum 1.
?ned an annular space of frusto-conical cross-section be
60
I claim:
tween surfaces 16 and 18.
Within the above-mentioned annular space, a plurality
1. A drum driving apparatus, comprising in combina
of frusto-conical wedge elements 19‘ arranged in a cir
tion: a cylindrical drum; a rotatable shaft extending
cular row are disposed. The elements 19 are all ?xed
axially through the drum; means for rotating the shaft;
to a disc plate 20 loosely mounted on the shaft 2 and
a disc rigidly secured to the shaft and perpendicular to
disposed in a plane perpendicular to the axis of the shaft. 65 the axis thereof, said disc having an external frusto
The disc plate 20 has an annular peripheral ?ange 21
conical surface; a ring secured to the interior of the drum
which engages slidably with an annular peripheral ?ange
22 of another disc plate 23 loosely mounted on the shaft
2 parallel to disc plate 20. The flanges 21 and 22 slid
in coplanar disposition with the disc, said ring having an
internal frusto-conical surface opposing the external sur
face of the disc and de?ning an annular frusto-conical
ably engage each other in a telescopic manner, so that 70
space
therebetween; a pair of spaced parallel plates hav
the disc plates 20 and 23‘ may move relatively to each
ing aligned central apertures; said shaft passing through
other in axial directions as well ‘as in circumferential di
3,064,946
o
the apertures in the plates, said plates being free of the
shaft for axial and rotational movement with respect to
the shaft; a plurality of frusto-conical members secured
to and circumferentially spaced on one side of one plate,
said members extending into said space; spring means
carried by the drum and engaged with said members
urging the members axially out of contact with the op
posing surfaces of the disc and ring; said plates having
opposing inter?tted annular ?anges; friction reducing
4
and de?ning an annular frusto-conical space therebe
tween; a pair of spaced parallel plates having aligned
central apertures; said shaft passing through the aper
tures in the plates, said plates being free of the shaft for
axial and rotational movement with respect to the shaft;
a plurality of frusto-conical members secured to one
side of one plate and extending into said space; spring
means carried by the drum and engaged with said mem
bers urging said members axially out of contact with the
means interposed between the plates to facilitate relative
surfaces of the disc and ring; said plates having opposing
rotational movement with respect to each other; by
inter?tted annular ?anges; friction reducing means inter
draulically operable means engaged with the other plate
posed between the plates to facilitate relative rotational
for moving said other plate axially to move the one plate
movement with respect to each other; hydraulically op
axially and force said members against the surfaces of
erable means engaged with the other plate for moving said
the disc and ring; stationary frame means disposed ex~ 15 other
plate axially thereby to move said one plate axially
ternally of the drum; and roller bearing means interposed
and
force
said members against the surfaces of the disc
between said frame means and said drum whereby the
and ring; stationary frames concentric with the drum;
drum is driven rotationally by the'shaft when the hy
spaced outer annular ?anges on the drum; and bearing
draulically operable means is actuated while the weight of
means
interposed between said frames and said outer
the drum is rotationally supported by said bearing means
annular ?anges, whereby all the drums are rotationally
and frame means.
driven by said shaft when the hydraulically operable
2. A drum driving apparatus, comprising in combina
tion: a plurality of hoist drums arranged in a row in
means are all actuated while the weights of the drums are
‘axial alignment; a rotatable shaft extending axially
through all the drums; means for rotating the shaft; a
drum driving assembly associated With each drum, each
assembly including a disc rigidly secured to the shaft;
References Cited in the ?le of this patent
UNITED STATES PATENTS
a ring secured to the interior of the drum in coplanar
disposition with the disc, said disc having ‘an external
frusto-conical surface, said ring having an internal frusto- 3
conical surface opposing the external surface of the disc
rotationally supported by said frames and bearing means.
841,198
Tredo _______________ __ Jan. 15, 1907
1,595,508
Farrell ______________ __ Aug. 10, 1926
2,567,526
Nitkey ______________ __ Sept. 11, 1951
2,916,924
Gray ________________ __ Dec. 15, 1959
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