close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2406601

код для вставки
Aug. 27, 1946.
G. w. FYLER
'
CUSHION MOUNTING
Filed April 21, 1943
‘Fig.1.-
2,406,601
'
‘
{Sheets-Sheet 1
>
'by fvé/mayém'
I His Attorney.
Aug. 27, '1946.
2,406,601
~ G. w. FYLER
CUSHION MOUNTING
Filed April '21, 1945
2 Sheets-Sheet 2
Pig. 5. ~
ma- ‘
‘"210
"
4/
I»
m
.
'/V///////////////4| \
a;
k\\\\\ i
71/1/11
)
..... H
.
'- II"
1////////////////////
\\\\\\\\\\\\\'
v
1
Inventor‘: ,
George W. ‘F‘ylev,
by
.
»
His Attorney.
~ 2,406,601
Patented Aug; 27’, 1946
' UNITED STATES PATENT oFFIcE
‘
'oGeorge' W. Fyler; Stratford;
'assignor to
General Electric Company, a corporation of
New York
Application Apriréi, 1943; S'ériail'Noa 4831915
8' Claims; (01. Meats)
1
,
2
I
_ My invention relates to cushion mountings for
A thin, to a, nietal'stiid l4,'the' lower portion er
sensitive apparatus subjected .to severe‘ shocks
and vibrations and it has for its object to previde
an improved cushion mounting having a large
amount of ?exibility along three mutually ‘15er
, which i‘sfin threaded engagement with cooperate
pendicular axes.
.
Another objecttof my‘ invention is tov prance.
van improved cushion mounting for apparatus,
subjected to exciting vibrations having ag'iven
frequency range, in which the resonant free
quency. of the mounting and supportedapp'ara
tus‘ is maintained considerably’lower' thanlthe
frequency of the excitirigrvibrationsby causing
the static de?ecting‘for'ce or the mass or the
apparatus to set up shear stresses in a resilient
supporting member.
A further object of myinventiorl
'
to'proiii‘de
an improved cushion mounting in which the‘ ‘r #
sili'ent members thereof are subjectedtc shear;
ih'g'th'r‘e’aids- in the supporting block H. A lack
nut i5 is provided rigidly to secure the stud I4
3 to'Sdpporting/block II; The‘ outer edgesof the
circular washer i2 are similarly bonded by vul
canization to‘th'e‘ inner surface of a cylindrical
metal‘ member‘ I6; A second: cylindrical metal
member‘ H is attached to the‘ apparatus It by
means of screws I‘B’and is spaced from the upper V
suirfacézof metal cylinder I6’ by means of a rub
cerirtiocksla; - Block l3; similar'to ritbber mem
ber" 12', is b'ond'ed‘to the’ ‘upper surface of cylinder
l6 and the’ inner surface of cylinder {7.
It iswell-known that when a mass is supported
by a‘resilient‘member, the ‘mass causes a certain
deflection in." the resilient mounting and the
amount of this de?ection can be used to calcu
"he resenan't ‘frequency of the‘ system. ‘ For
"- mass‘rtlie relationship is substantially
ing stresses in all ‘planes throughout a primary;
‘and as the m‘a'gnitu'de' of the initial de_~
?e tiio’n'inéreases, tiie'reson'ant frequency 'of the
system decreases.’ It is also known that the am;
The features of my invention-Which‘ I believe
plitu'de of vibration-fer such a system is ‘greatest
to‘ be novel‘ are set forth with partieularity in
the" appended claims‘. My invention- itself, how--v 25 when tile frequency or an exciting vibration is
ever,» both as to its organization and method of‘
the resonant ire ‘
system. For e32:
operation, together with further objects and ‘ad-1
citing‘ vibratien eta >
y greater than the
resonant frequency-or ‘the system, the amplitude
vantages thereof, may best- be‘ understood by ref-‘
ereiice to the following-description taken’ in c‘o’n-‘
of ililoratiortv 0f! theT'SZSISte'lnl drops
and may
30
ome considerably‘ smaller than that er the’
necti'on with/the accompanying drawings.
In~ the drawings; Fig. 1? represents a-cus’hion"
eii-tihg vibration;
’ H
range of de?ection and to compressional stresses‘
throughout a secondary range of de?ection.
mounting according to my invention‘; _Fi'g_~.- ‘2‘ is
a emodi?cation'of the mounting shown; in
1-;
Fig. '3 is a portion‘ of a side‘ elevationalview of
a modi?cation‘of the‘ mounting of Fig. '2'; Fig 4‘
is a sectional elevation view‘ along the-line 45d“
of Fig. 3; Fig. 5 is a sectional View" along- the
line 5—5 of Fig. 4; Fig. 6 is a sectional elevation
View of the mounting‘ of Fig. 3 along the lines
lie-6; and Fig. 7 is a’ sectional view‘ of the mount
ing'? along the lines ‘lé'liof Fig. 6.
Referring to Fig. l, Inhave shown a member
Ill which is supported by a ?xed supporting
means H. The member It? maycompris‘e any
From tneroregcmg it is seen that;
order
to‘ protect systemuagamst vibraticns over a
“'
eq eiicy range-,4 it"is" desirable to have the
it‘ frequency er the system considerably
law-er than the lowest-"frequency ‘of; that‘ range
so" tnatitneiampiitddeio vibration or the system
eta-‘11s lowest" freq 'ricylisf-riot greater than that
of the’ éxtéitin’gT so
eI
i %
indium"valuei the resilient‘: tubers’ or
theistic - moimtine"
sensitive apparatus,’ such asia'radio equipment;v 45 planes‘ softirt‘fcr'ws
and the supporting means" H'may be subjected
to undesirable vibrations and sudden impulse
shocks. In order to prevent these vibrations
from- being imparted to the" member ID’, a1 pair
and ~ is‘ considerably less
than! theéhigher frequencies
the range.
‘
In order that} the ‘resonant ‘frequency of. the
system (shown: in ‘Fig?- l”)' may be kept‘ below‘ a
‘e‘- located‘ iii‘ transverse
any directioninitiially
he; resuiént‘members.
~
_
I
ave-meal piste,- wan-e
member [3 is; subjected to Shearing stresses by
of transverse resilient members‘ [2 and I3‘ are 50
interposed between the member Ill and the sup‘
porting means I I. The resilient members I2 and
‘hers’ 7! 2F and" l sprovicés shear
v
c'tioiis; since a force in any
directio?‘mayte‘ rescivedfintc components in ver
l3vmay comprise circular rubber blocks or pads.
tical and. horizontal planes“.- Since- the' stiffness
The rubber member i2 is; securedin anyv wen
known manner, as‘ by bonding during-vulcaniza 55 of a‘rutbe'r‘mount shear is approximately only
2,406,601
4
one-?fth as great as the stiffness in compression,
channel member 40 of considerable length is sup‘
it is apparent that a mount constructed in‘ ac
ported by a plurality of shorter channel mem
cordance with Fig. 1 produces a large initial de
bers 4|, 42, 43 disposed at right angles to mem
?ection and the resonant frequency of the sys
tem is kept to a low value.
ber 48. Details of the cushion mounting used
with the channel members 43-43 are pointed
When the mount of Fig. 1 is subjected to a
force in a_ given direction, for instance, a force
F acting to the right in Fig. 1, the rubber block
53 is subjected to shearing stresses over a given
out in the following description of Figs. 4-7. In
the several Figs. 3-’? corresponding parts have
been indicated by corresponding reference nu
merals.
range. When a predetermined longitudinal de 10 ‘Referring to Fig. 4, I have shown the cushion
mounting for supporting body member 45 on a
?ection of block I3 is obtained, the inner surface
?xed support 46. A metal block 55 is provided
of the vertical wall of member I‘! contacts the
within the elongated channel 44) and contains
outer surface of the vertical wall of cylinder IE
suitably shaped recesses 56 to receive the heads
to compress the rubber member 12. Thus, when
the shear range of block I3 is exceeded, the unit 15 of bolts 51 used for securing the channel 4!} and
the block‘55 to the supported member 45. A
changes over to a gradual compression, or snub
metal pad 651s interposed between the upper
bing, action. Similarly, for a force acting down
surface of channel 40 and the bottom of the
ward on member l0, rubber block I2 is initially
supported member 45 for purposes pointed out
subjected to shearing stresses until the bottom
edge of cylinder l6 contacts the upper surface 20 later. In the manner described in connection
with the cushion mounting of Fig. 2, channel 40
of supporting member ||. Thereafter, the rub
has attached to it a pair of resilient members
ber block I3 is subjected to compression stresses
59 and 64 and a pair of angle members 6| and
untihultimately, the lower edge of cylinder l'l
62 are attached to the opposite faces of these
contacts the upper surface of member | |. Such
a cushion mounting provides a ?nal limit to the 25 resilient members.
The elongated channel 4|, as seen in Fig. 5,
de?ection without any discontinuities in the
similarly contains a metal block 41 having re
cushioning action to affect adversely the mem
cesses 48 for the reception of the heads of bolts
ber Hi. In a practical system, when a cushion
'49 provided to secure rigidly the channel 4| and
mounting of the type shown below the member
id in Fig. l is also used above the member l9, 30 the block 41 to the support 48. Also, channel 4|
is mounted on a metal pad 54, whose function is
this member, which may comprise sensitive con
pointed out later. Similar to the structure
trol apparatus, is protected by two units working
shown in Fig. 4, the portion of the cushion
oppositely to cushion the apparatus against
mount shown in Fig. 5 is provided with resilient
shocks and vibrations from all directions.
members 58, 5| and angle members 52, 53.
In Fig. 2 there is shown a modi?cation of the
A metal plate 63 of substantially the same
cushion mounting in which two channel shaped
length as channel 40 is interposed between the
members 25 and 26 are transversely disposed.
The supported member 25 may be bolted to an ‘ opposing faces of angles 52, 53, and angles 6|, 62
and is held rigidlyin this position by fastening
object to be supported and supporting channel
26 may be bolted to a ?xed support. Rubber 40 bolts 64 extending between the supporting angles
6|, 62 attached to channel 40 and angles 52, 53
blocks 2'! and 28 are secured to the opposite sides
attached to channels 4 |-43.
of channel 25 and rubber blocks 29 and 38, to the
In order to provide means to cushion the chan
opposite sides of channel member 26. The top
nel 4| and the metal block 41 from the metal
and bottom faces of these rubber blocks are in
clined at an angle to the horizontal so that the 45 plate 63, a rubber pad 61 is placed under the
plate 63 and extends along this plate directly
blocks?‘i and 28 support channel 25 in an ele
above the channel 4|. Similarly, as may be seen
vated position. Rigid members, such as angles
in Figs. 4 and 6, in, order to prevent the chan
3| and 32, are secured to the outside faces of
nel 40V and the block 55 from striking against the
rubber blocks 2'! and 28 and are bolted to the
rigid angle members 33 and 34 secured to the. 50 plate 63, a rubber pad 66 is placed upon the plate
63 and extends along this plate directly beneath
outside faces of rubber blocks 29 and 30. In this’
the channel 49. The rubber pads 66 and 61 may
manner the angles 3|—34 form a unitary struc
be attached to the plate 63 by any suitable
ture which acts as a substantially rigid member
means, such as the locating projections 68 formed
interposed between the resilient members 2'! and
integrally with pads 86 and 61 and extending
23 and the members 29 and 30. Accordingly,
Within cooperating holes provided for that pur
forces acting on the structure of Fig. 2 in the
pose in the plate 63.
g
>
direction of F’ cause, initially, shearing stresses
In order to provide means to limit vertical de
in the members 21 and 28 and produce a longi
?ections of the cushion mounting of Fig. 3, as
tudinal de?ection of these members. In order to
limit the longitudinal de?ection of members 21 60 well as to provide means responsiveto predeter
mined longitudinal de?ections of one set of re
and 23 to a predetermined amount, as‘well as to
silient members to produce lateral de?ections of
provide means to change from shearing stresses
the transverse set of resilient members, T-headed
in the members 27 and 28 to compressional
bolts ‘ll and it, best seen in Figs. 6 and'l, extend
stresses in members 29 and 34, the protective
straps 3E and 3'! are secured, as by welding, to the 65 respectively between the supported member 45
and plate 63 and between support 46 and plate
angles 3| and 32. Similarly, to limit to a pre
653. The belt’ ‘m passes loosely through hole 16
determined value the de?ection of resilient mem
in block 4'l and is in threaded engagement with
bers 29 and 3|], due to forces acting along the
support 46, being securely fastened thereto by
direction of the axis of channel 26, protective
straps 38 and 39 are secured to angles 33 and 34.‘ 701 means of nut 12. It passes through rectangular
slots 23 in plate 43 and rubber pad 61 to extend’
After a predetermined longitudinal de?ection of
within the space between’ plate’ 63 and channel
members 29 and 34, the channel 26 contacts strap
45. Similarly, bolt ‘H passes through hole 71in
38 or 39 to initiate compressional stresses in re
silient member 21 or 28.
Q
In the cushion mounting shown in Fig. 3, a
member 55, and is in threaded engagement with‘
supported member 45, being securely fastened
‘ 2,406,601
5
6
thereto by means of nut '14. The head of bolt
ll likewise passes through a rectangular slot 15
in plate 63 and padv 65 to project between the
channels 43 and 42. After being passed through
the openings ‘53 and 75 in plate-63, the T-headed
bolts 18 and ‘H are turned so that the longer
axes of the heads of these bolts aretransverse to
.
mounted to set up shearing stresses opposing
forces applied thereto along three mutually per
pendicular axes, and means responsive to'prede
termined longitudinal de?ections of one of said
resilient members to produce lateral de?ections
of the other of said resilient members, said last
means comprising a rigid structure attached to
both of said resilient members, said rigid struc
ture being arranged to contact said supported
and 75.
I
'
When the cushion mounting illustrated in‘ Figs. 10 member after said predetermined deflections and
to compress said other resilient member between
3-7 is subjected to a force, for example, to the
said rigid structure and said supporting means.
left in Fig. 3 along the axis of channel 43, the
2. A cushion mounting for a member supported
resilient members ‘55-3 and ?ll are first subjected
the longer sides of the rectangular‘openings ‘f3
de?ection of ‘a‘predetermined amount of members
59 and 6d, the neck‘cf bolt ‘H, engages the end of
by- means subject to undesirable vibrations com
prising, a pair of transverse resilient members
interposed between said member and said sup
slot E5 in plate 631.
porting means, means to'limit vertical de?ections
to shear stresses.
After the force has produced
If the force is sufficient to
of- each of said resilient members comprising a
rigid structure attached to both of said resilient
the resilient members 5!. Ultimately the side of 20 members and arranged to contact both said sup
ported member an'd'said supporting means after
slot 75 of plate $5 strikes the neck of bolt ‘Id to
predetermined vertical de?ections of said resilient
prevent further movement of the ‘mounting.
produce further de?ection,’ the bolt 'il, acting
through the plate 63 and angle 53, compresses
In a similar manner, forces transverse to the
axis of channel dd produce, in sequence, shearing
members, and means attached to said structure
to produce lateral de?ections of one of said re
stresses in rubber members 50 and 5!, contact of 25 ‘si-li‘ent membersi after a predetermined longi
tudinal de?ection of the other of said resilient
bolt is with the end of slot 13, compression
members.
stresses in resilient member 69, and ?nally con
3. A cushion mounting for a member supported
tact cf bolt '1! with the side of opening 15. It is
apparent, also, that forces acting downwardly in
a vertical plane, such as the force F" inrFig. 3,
initially produce shearing stresses in members 59,
Lil and 59, 69. After a predetermined de?ection
of these members, metal blocks ‘El and 55 com
press rubber pads 67 and 66. Metal pads 54 and
65 function to prevent angles 52, 53 from con
tacting support 45 and angles BI, 62 from con.
tacting supported member I15 until pads b6 and
5'1’ are fully compressed. Vertical movement
by means subject to undesirable vibrations com
prising, a pair of transverse resilient members
interposed between said member and said sup
porting means, and means responsive to prede
termined longitudinal de?ections of either of said
resilient members to produce lateral de?ections
of the other of said'resilient members, said last
means comprising a rigid structure attached to
both of said resilient members, said structure
being arranged to contact said supported member
after said predetermined de?ections to compress
downwardly ceases when the vertical legs of
angles 52, 53, 6!, and 82 contact the horizontal 40 said other resilient member between said rigid
structure and said supporting means.
surfaces of members 65 and 46. Vertical de?ec
ll. In a cushion mounting for a supported mem
tions upwardly set up shear stresses in members
ber, the combination of a ?rst resilient means
5i}, 5!, 59, and 6?! until further upward movement
attached to said member, saidmeans extending
is prevented by the heads of bolts ‘Ill and ‘H con
tacting metal plate tit.v
,
It is thus seen that my invention provides a
cushion mounting in which, by proper selection
of the mass of the elements of the mounting and
45 in a direction parallel with said member and
being subjected to shear stresses by forces acting
on said member in said direction, a second re
silient means mechanically connected to said ?rst
means and extending in a second direction trans
nant frequency of the mounting is adjusted to 50 verse to said ?rst direction, said second means
being subjected to shear stresses by forces acting
a value lower than that of the lowest frequency
the use of resilient elements in shear, the reso
on said member in said transverse direction, and
limiting means attached to each of said resilient
means whereby when the de?ection of one of said
vides means for initially absorbing all de?ecting forces by the setting up of shear stresses in cer 55 resilient means due to said shear stresses equals
a predetermined value the other of said resilient
tain of the resilient elements and, after initial
means is subjected to compressional stresses, both
deflection of these elements, by causing other
of said resilient means being subjected to shear
resilient elements to be compressed. In this
stresses by forces acting on said member in a
manner any secondary shocks to the system which ,
would occur through sharp discontinuity of the, 60 direction transverse to said ?rst and second
directions.
resisting force are avoided.
5. A cushion mounting for a member supported
While I have shown a particular embodiment
by means subject to undesirable vibrations com
of my invention, it will of course be understood
prising, a pair of transversely disposed channel
that I do not wish to be ‘limited thereto since
various modifications maybe made, and I con 65 shaped members, one of said channel members
being fastened to said supported member and the
template by the appended claims to cover any
other of said channel members being fastened to
such modi?cations as fall within the true spirit
said
supporting means, resilient means attached
and scope of my invention.
along the sides of each of said channel members,
What I claim as new and desire to secure by
substantially rigid connecting means interposed
70
Letters Patent of the United States is:
between
said resilient means, and means respon
1. A cushion mounting for a member supported
sive to a predetermined longitudinal de?ection of
by means subject to undesirable vibrations com
either‘ of said resilient means to produce a lateral‘
prising, a pair of transverse resilient members
de?ection of the other of said resilient means.
interposed between said member and said sup
in the range of vibrations to which the mounting
is subjected. The cushion mounting further pro
porting means, said resilient members being
6. In 9, support, the combination of a pair of ,
2,406,601
7
8
a substantially rigid member positioned between
resilient members for producing compression of
the other of said resilient members, said last
means comprising rigid overlapping members
transversely disposed channel shaped members,
said channel shaped members, resilient means
attached along the sides of each of said channel
members and connected to said substantially rigid
positioned on opposite sides of said one resilient
means for directly contacting said supported
member, said resilient means being mounted to
member after said predetermined deflection.
set up shearing stresses opposing forces applied
8. In a support, the combination of a pair of
to said channel members along three mutually
transversely disposed channel shaped members,
perpendicular axes, means responsive to a prede
resilient means attached along the sides of each
termined longitudinal deflection of either of said 10 of said channel members, substantially rigid con
channel members to produce a lateral deflection
necting means interposed between and connected
of the other of said channel members, said last
to said resilient means, said resilient means being
means including means to limit the motion of
mounted to set up shearing stresses opposing
said channel members along each of said axes.
forces applied to said channel members along
'7. A cushion mounting for a member supported 1.5 three mutually perpendicular axes, said connect
by means subject to undesirable vibration com
ing means including rigid members parallel with
prising a pair of transverse resilient members
and partially co-extensive with said channel
interposed between said member and said sup
members, the points of connection of said re
porting means, a substantially rigid connecting
silient means to said connecting means being
means interposed between said resilient members, 20 greater than the distance between said channel
said resilient members being mounted to set up
members and said connecting means whereby the
shearing stresses opposing forces applied to said
setting up of substantial tension stresses in said
supported member along three mutually perpen
resilient means is prevented.
dicular axes, and means responsive to a prede
termined longitudinal de?ection of one of said 25
GEORGE w. FYLER.
Документ
Категория
Без категории
Просмотров
0
Размер файла
737 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа