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Патент USA US3090596

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May 21, 1963
R. F. SCHWEGLER ET AL
3,090,586
MACHINE MOUNTING
Filed Jan. 4, 1961
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Unite States Patent *0 " ice
1
3&90586
Patented May 21, 1963
2
3,090,586
MACHINE MOUNTING
Roy F. Schwegler, Davenport, Iowa, and Kenneth H.
Wolverton, Molina, 111., assignors to Ametek, Inc., New
York, N.Y., a corporation of Delaware
Filed Jan. 4, 1961, Ser. No. 80,639
9 Claims. (Cl. 248-40)
The present invention relates to vibration isolation
stopping of the rotary basket of the extractor with un
balanced loads therein.
In still another aspect of the invention, shock-absorb
ing means which preferably are double-acting may be
arranged at each of the four corners of the suspended
platform, and they may be arranged in such a manner
to damp all three modes of vibration, namely, vertical,
horizontal and torsional, that are induced in the plane
of rotation of an unbalanced load.
mountings for machines normally subjected to vibra 10 The above, other objects and advantages of the inven
tion will become apparent from the following speci?ca
tions due to unbalanced loads being rotated, such as
washer extractors and the like.
tion and accompanying drawing which is merely exem
In washer extractor machines and the like, vibrations
due to unbalanced loads, stopping and reversing seriously
affect the supporting structure to which such machines 15
are fastened. There are three types of induced vibration
plary.
‘In the drawing:
FIG. 1 is a perspective view of a washer extractor to
which the principles of the invention have been applied;
and
in the plane of rotation of the unbalanced load, namely,
FIG. 2 is a perspective view of a detail of a modi?ed
vertical, horizontal and torsional.
The principal object of this invention is to provide a
form of shock absorber and mounting.
mounting for machines normally subjected to vibrations 20 Referring to ‘the drawing, the principles of the inven
due to the rotation of unbalanced loads, which mounting
tion are shown as applied to a mounting for a washer
will isolate from the supporting floor the major portion
extractor including a housing 10 within which a basket
of forces incident to such vibrations.
11 is mounted for rotation about a horizontal axis 12.
Another object of the invention is to provide such a
The housing 10 may be rigidly ?xed to a platform 13.
mounting that will lessen the transmitted forces due to 25 Angle members 14, .15, 16 and 17 may be ?xed to the
reversals and stopping of such machines.
four corners, respectively, of the platform 13. The ver
Still another object of the invention is to provide such
tical, upstanding legs of angle members 14 and 15 may
a mounting that is elastic and has a natural period of
face each other, and they may be provided with holes
vibration well below the normal operating speed of the
machine being supported.
A still further object of the invention is to provide
such a mounting which is of simple and inexpensive con
18,19, 20 and 21. The holes 18, 1? may be aligned
with each other, and holes 20, 21 may be aligned with
each other.
The vertical, upstanding legs of angle members 16
and 17 may face each other and they may be provided
Still another object of the invention is to provide such
with holes 22, 23, 24 and 25. The holes 22, 23 may
a mounting augmented by shock-absorbing means capa 35 be aligned with each other and at the same elevation
ble of damping all three modes of vibration, namely, verti
as holes 18 and 19. Holes 24 and 25 may be aligned
cal, horizontal and torsional.
with each other and at the same elevation as holes 20, 21.
A generally U-shaped torsion bar assembly 26 may
In one aspect of the invention, a machine of the
washer extractor type may be rigidly ?xed to a platform,
have parallel legs 27, 28 coupled by a coupling member
at each of the four corners of which may be located 40 ‘29. Right angle extensions 30 and 31 may be provided
an angle member arranged with a free leg extending
at the free ends of legs 27 and 28, respectively. The
vertically upwardly from the platform. The angle mem—
leg 27 may pass through aligned holes 20 and 21 in angle
bers on each of two sides of the platform may face each
members 14 and 15, and the extension 30 may pass
other and may be provided with vertically spaced, aligned
through a hole within a leg 33 of an angle member 34,
45 the other leg 35 of which may be bolted to the support~
holes.
ing ?oor. The leg 28 of bar member 26 may pass through
In another aspect of the invention, a torsion bar sup
port may be provided for the platform. It may com—
aligned holes 24 and 25 in angle members ‘16 and 17,
prise two U-shaped torsion bar arrangements at the free
and the extension 31 may pass through a hole 36 in an
ends of the legs thereof having right angular extensions.
angle member 37 similar to member 34 and which also
One of the torsion bar arrangements may pass through 50 may be bolted to the supporting ?oor. Collar 32 may
one set of aligned holes in the angle members on the
be provided on extension 36. Assembly 26 may be a
single piece.
platform and surround three sides of the washer extrac
tor, with the right angular extensions at the free ends
Another torsion ‘bar assembly 38', identical with assem
of the legs passing through holes within other angle mem
bly bar 2i6,‘may be arranged in reverse fashion relative
55 to bar 26. It may include a leg 39 that passes through
bers rigidly ?xed to the floor supporting the extractor.
In another aspect of the invention, the other U-shaped
aligned holes 18 and 19 in angle members 14 and 15.
torsion bar arrangement may pass through the other set
A right angle extension ‘40 on the free end of leg 39
of vertically spaced, alignedholes in the angle members
may pass through a hole in an angle bnacket 42 that may
be bolted to the (?oor. A leg 43 of the bar 38 may pass
on the platform and also surround three sides of the ex
60 through aligned holes 22 and 23‘ in angle members 16
tractor, but reversely relative to the ?rst-mentioned tor
and 17, and an ‘extension 44 may pass through a hole
sion bar arrangement, so that all four sides of the extrac~
45 in ‘an angle member 46 identical to member 34, and it
tor are surrounded by torsion bars. The right angular
may also be bolted to the supporting ?oor. Coupling
extensions of the second U-shaped arrangement may pass
through holes within other angle members that are ?xed 65 member 2.9"may couple the ends of legs 39 and 43‘.
‘Collar 41 may be fastened to extension 40‘. It should
to the supporting floor at the end of the extractor oppo
be evident that assembly 38 may be a single piece.
site that where the ?rst-mentioned ?oor angle members
Shock absorbers 47 and 48 may be mounted between
are located.
the housing 10 and the supporting ?oor on opposite- sides
- In still another aspect of the invention, shock ab
of the axis of rotation of the basket 1'1 for absorbing
sorbers may be attached to the extractor and ?oor on
severe vibrations incident to stopping and reversing un
opposite sides of the axis of rotation of the extractor
balanced loads within the basket 11.
basket for lessening the shock incident to reversals and
> From the foregoing it ‘is evident that an elastic suspen
struction.
‘
3,090,586
3
.
>
it
sion has been provided for a machine including a rotat
able unbalanced load. To better ‘visualize the action of
the mounting, consider the housing as being ?xed in space
ments having a natural period of vibration substantially
below the normal rotative speed of said rotatable member.
and that the angle members 34, 42, 37 and 46 are vi
brating vertically. It is evident that the legs 27, 39, 28
a housing mounted on said platform; a rotatable member
and 43 are subjected to torsional vibrations which act
on the bars 29 land 29', subjecting their top and bottom.
?bers to alternate tensile and compressive stresses.
The arrangement of the torsion bars 26v and 38‘ is such
2. Apparatus comprising in combination, a platform;
within said housing that normally is subjected to unbal
anced loads; mounting means ?xed to a supporting floor;
brackets at the four corners of said platform; hole means
within each bracket aligned with hole means Within an
other of said brackets; torsion bar arrangements having
that the natural frequency of vibration of the mounting 10 leg means of one arrangement passing through the aligned
is of a relatively low order compared with the normal
hole means of certain of said brackets and the leg means
speeds of rotation of the basket .11. So long ‘as this re
of another arrangement passing through the ‘aligned hole
lationship exists, the forces incident to vibrations of the
means of certain other of said brackets; arm means at
housing 19 occasioned by the rotation of basket '11 With
the free ends of each leg means connected to one of said
an unbalanced load at extracting speeds will be largely 15 ‘mounting means for supporting said platform at a de
isolated from the supporting ?oor. For example, with
sired distance ‘from said ?oor, said torsion bar arrange
a ‘machine having an intermediate speed of rotation of
ments having a natural period of vibnation substantially
180 rpm. and a high speed of 550 r.p.m., it was found
below the normal rotative speed of said rotatable mem
that employing the above described suspension having a
her; and shock absorber means between said housing and
natural frequency of about 124 cycles per minute isolated 20 ?oor.
the major vibration forces from the supporting ?oor, and
3. Apparatus comprising in combination, a platform;
that rat the speed of rotation corresponding to 124 cycles
afhousing mounted on said platform; a rotatable member
within said housing that normally is subjected to unbal
per minute; period, the unbalance forces are normally
anced loads; mounting means ?xed to a supporting floor;
small.
bnackets at four corners of said platform; vertically
Referring to FIG. 2, each of the ‘angle members 14,
spaced holes within each of said brackets aligned with
15-, v16 and 17 may have ?xed to one of its vertically ex
tending edges 49, the housing Sll of a double-acting shock
vertically spaced holes within another of said brackets;
U-shapecl torsion bars arranged reversely with respect to
absorber 5-1. The shock absorber 51 may be of conven
each other, the legs of one of said arrangements passing
tional design including a hydraulic cylinder 52 within
which a piston is adapted to reciprocate in a restricting 30 through all of the aligned holes in one plane and the legs
of the other arrangement passing through all of the holes
manner by the oscillation of an- arm 53. The arm 53
in another plane; and
means at the free ends of each
may be ‘arranged at substantially a 45° angle with the
leg connected to one of said mounting means.
horizontal, and substantially radial relative to the axis 12
4. Apparatus comprising in combination, a platform;
of rotation of the basket 11. The free end of arm 53'
may include a cam follower lever 54 at right angles to 35 a housing mounted on said platform; a rotatable member
within said housing that normally is subjected to unbal
arm 53, and it may ride within a slot 55 fumed in a
anced loads; mounting means ?xed to a supporting ?oor;
vertical wall 56 integral with the angle bracket or sup
brackets at four corners of said platform; vertically spaced
porting means 42. The slot 55 may be at substantially
holes within each of said brackets aligned with vertically
a 45° angle ‘with the horizontal. ‘By so arranging the
‘arm 53 and slot 55, components of all three vibrations, 40 spaced holes {within another of said brackets; U-shaped
namely, vertical, horizontal and torsional, within the
plane of rotation of an unbalanced load within basket 11
will be damped.
'
I
When washer extractors are operated in the extracting
cycle with off-balance loads, the vvibrations become ex
cessive and prior practice has required use of heavy foun
dations extending to solid ground. By use of the prin
ciples of the present invention, it has been found possible
torsion bars arnanged reversely with respect to each other,
the legs of one of said arrangements passing through all
' of the aligned holes in one plane ‘and the legs of the other
arrangement passing through all of the holes in another
plane; arm means at the free ends of each leg connected
to one of said mounting means; and shock absorber
means between said housing and floor on opposite sides
of the axis of rotation of said rotatable member.
5. ‘Apparatus com-prising in combination, a platform;
floors of buildings without special foundations. It also 50 a housing mounted on said platform; a rotatable member
within said housing that normally is subjected to ‘unbal
has been ‘found that the machine movement permitted
anced loads; mounting means ?xed toa supporting ?oor;
by the mounting arrangement described herein assists in
to mount large 'Washer extractors on second or upper
bnackets at the four corners of said platform; hole means
shaking the clothes free from the interior of the drum as
within each bracket aligned with hole means within an
the machine slows down.
other of said brackets; torsion bar arrangements having
Although the various features of the elastic mounting
leg means of one ‘arrangement passing through the aligned
have been shown and described in detail to fully disclose
hole means of certain of said brackets vand the leg means
one embodiment of the invention, it will be evident that
of another arrangement passing through the ‘aligned hole
changes may be made in such details and certain features
means of certain other of said brackets; arm means at
may be used ‘without others without departing from the
60 the free ends of each leg means connected to one of said
principles of the invention.
mounting means for ‘supporting said platform ‘at a desired
What is claimed is:
distance from said floor, said torsion bar arrangements
1. Apparatus comprising in combination, a platform;
having a natural period of vibration substantially below
a housing mounted on said platform; a rotatable member
the normal rotative speed of said rotatable member; and
Within said housing that normally is subjected to unbal
shock ‘absorber means between each corner of said plat
anced loads; mounting means ?xed to \a supporting ?oor;
form and said supporting floor.
brackets at the four corners of said platform; hole means
6. Apparatus comprising in combination, a platform;
within each bracket aligned with hole means within an
a housing mounted on said platform; a rotatable member
other of said brackets; torsion bar arrangements having
within said housing that normally is subjected to unbal
leg means of one arrangement passing through the aligned
hole means of certain of said brackets and the leg means 70 anced loads; mounting means ?xed to ya supporting floor;
of another arnan-gement passing through the aligned hole
means of certain other of said brackets; and arm means
at the free ends of each leg means connected to one of
brackets at the ‘four corners of said platform; hole means
within each bracket ‘aligned with hole means within an
other of said brackets; torsion bar arrangements having
leg means of one arrangement passing through the
desired distance from said floor, said torsion bar arrange 75 aligned hole means of certain of said ‘brackets and the
said mounting means for supporting said platform at a
3,090,586
5
leg means of another arrangement passing through the
aligned hole means of certain other of said brackets; arm
means at the free ends of each ‘leg means connected to
one of said mounting means for supporting said platform
at a desired distance from said floor, said torsion bar
arrangement having a natural period of vibration sub
stantially below the normal rot-ative speed of said rotat
able member; double acting shock-absorbing means
spaced holes Within another of said brackets aligned with
vertically spaced holes within another of said brackets;
U-shaped torsion bars arranged reversely with respect to
each other, the legs of one of said arrangements passing
through all of the aligned holes in one plane and the legs
of the other arrangement passing through all of the holes
in another plane; arm means at the free ends of each
leg connected to one of said mounting means; and shock
absorber means i etween each corner of said platform
mounted at each corner of said platform, each including
an oscillata‘ble arm normally positioned substantially 10 and said supporting ?oor.
9. Apparatus comprising in combination, a platform;
along a radial line relative to the axis of rotation of said
a housing mounted on said platform; a rotatable member
rotatable member; and stationary means on said support
Within said housing that normally is subjected to unbal
ing floor for cooperating with said oscillatable arms.
anced loads; mounting means ?xed to a supporting floor;
7. Apparatus comprising in combination, a platform;
a housing mounted on said platform; a rotatable member 15 brackets at four corners of said platform; vertically
spaced holes Within each of said brackets aligned with
within said housing that normally is subjected to unbal
vertically spaced holes within ‘another of said brackets;
anced loads; mounting means ?xed to a supporting ?oor;
U-shaped torsion bars arranged reversely with respect
brackets at the four corners of said platform; hole means
to each other, ‘the legs of one of said arrangements pass
within each bracket ‘aligned with hole means Within an
other of said brackets; torsion bar arrangements having
leg means of one arrangement passing through the aligned
ing through all of the aligned holes in one plane and the
legs of the other arrangement passing through all of the
holes in another plane; ‘arm means at the free ends of
each leg connected to one ‘of said mounting means; dou
ble acting shock-absorbing means mounted at each cor
means of certain other of said brackets; arm means at
the free ends of each leg means connected to one of said 25 ner of said platform, each including an oscillatable arm
hole means of certain of said brackets and the leg means
of another arrangement passing through the aligned hole
mounting means, said torsion bar arrangements having
normally positioned substantially along a radial line rel
ative to the axis of rotation of said rotatable member;
a natural period of vibration substantially below the nor
and stationary means on said supporting r?oor for cooper
mal rotative speed of said rotatable member; double act
ing shock-absorbing means mounted at each corner of
ating with said oscillatable- arms.
said platform, each including an oscillatable arm nor 30
mally positioned substantially along a radial line relative
to the axis of rotation of said rotatable member; and
stationary means on said supporting ?oor for cooperating
with said oscillatable arms.
8. Apparatus comprising in combination, a platform; 35
a housing mounted on said platform; a rotatable member
Within said housing that normally is subjected to unbal
anced loads; mounting means ?xed to a supporting ?oor;
brackets ‘at ‘four corners of said platform; vertically spaced 40
holes within each of said brackets aligned with vertically
References Cited in the ?le of this patent
UNITED STATES PATENTS
2,148,937
2,232,456
Ger-b _______________ .._ Feb. 28, 1939
Hewetson ____________ __ Feb. 18, ‘1941
2,647,591
2,665,007
Young _______________ __ Aug. 4, 1953
Hallander ____________ .._ Jan. 5, 1954
123,618
1,185,228
Australia ____________ __ Feb. :17, 1947
'France _______________ __ Feb. 9‘, ‘1959
FOREIGN PATENTS
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