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Патент USA US2405122

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OUGI UH nuum
Aug. 6, 1946.
2,405,122
D. FIRTH
SHAFT BEARING
Filed Aug. 25, 1944
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2,405,122
D. FIRTH
SHAFT BEARING
Filed Aug. 25, 1944
2 Sheets-Sheet 2
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BEARiNGS & GUlDES
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2,405,122..‘
Patented Aug. 6, 1946
UNITED STATES PATENT OFFICE
2,405,122
SHAFT BEARING
David Firth, South Bend, Ind., assignor to Dodge
Manufacturing Corporation, Mishawaka, Ind.,
a corporation of Indiana
Application August 25, 1944, Serial No. 551,204
9 Claims. (Cl. 308-1871)
1
This invention relates to antifriction shaft
bearings, more particularly of the type exempli
?ed by an annular antifriction bearing unit and
a sealed housing in which it is mounted in re
tained assembly therewith, the assembled bearing
2
at both ends; said member being of generally
annular form though it is shown formed integral
ly with a base I“ provided with holes lb for pas
sage of bolts for attaching it to a machine frame
or other support. The housing may if desired be
truly annular or of uniform cross section and
mounted in a two-piece outer housing or in a
strap-type supporting and holding structure such
for example as is disclosed in the Carver Patent
structure being applicable to a shaft without dis
assembly by slipping it over the end of and along
the shaft and fastening the inner bearing ring
thereto.
An object of the invention is to provide a bear 10 1,931,055 of October 17, 1933.
Mounted in said housing is an annular ball
ing of the class indicated of relatively simple
bearing unit, the outer race-ring 2 of which ?ts
but practicable and e?lcient construction with re
the bore of the housing. It will be understood
spect to the housing and means for taking thrust
that the outer and inner race-rings 2 and 3 of
and for sealing the bearing; having in view re
duction of expense of manufacture consistently 15 said unit are held in concentric relationship and
against relative endwise displacement by the in
with the provision of a housing with thrust-re
sisting shoulders capable of withstanding thrusts
due to shaft expansion and contraction.
Another object of the invention is the provision
terposed balls 4 running in confronting annular
races or grooves in said rings, the balls being of
a suf?cient number or of such number and so
of a construction which can be easily organized 20 spaced as to be held in proper assembly with the
race-rings. The unit shown typi?es any suitable
either as an expanding or non-expanding bear
annular anti-friction bearing unit which may be
ing, and which if produced as an expanding type
utilized in a structure to which the present in
bearing can by a simple adjustment be converted
vention may be applicable.
into the non-expanding type.
‘
Further objects more or less auxiliary or sub 25 Assuming the inner race-ring to be mounted
on and attached to a shaft, end thrust imposed
sidiary to the foregoing will appear as the de
scription proceeds.
by shaft expansion and contraction will be trans
mitted by the balls to the outer race-ring and
from the latter to the housing by means presently
for illustration a ball-bearing pillow block em
30 to be described. The inner race-ring 3 of the
bodying the invention in one practicable form.
illustrative structure is designed to be mounted
Fig. 1 of the drawings is an end elevation _of
directly on the shaft to which the structure is
the illustrative bearing structure, partly in cross
to be applied, such shaft being indicated in dot
section.
ted lines and designated by the numeral 5 in Figs.
Fig. 2 is a longitudinal section of said structure
2 and 3. Said inner race-ring is therefore bored
organized as a non-expanding bearing, the upper
to ?t the shaft, preferably with such a close slip
half of the section being taken on the line A—-A
?t as to require tapping said ring with a hammer
of Fig. 1, looking in the direction of the arrows,
to force it on and along the shaft to desired posi
and the lower half of the section being taken on
tion thereon. Said inner race-ring is shown as
the line 3-3 of Fig. 1, looking in the direction
40 elongated, extending beyond the ends of the outer
of the arrows.
race-ring and also beyond one end of the hous
Fig. 3 is a similar section of said structure or
ing. In its projecting end it is provided with
ganized as an expanding bearing.
threaded screw-holes containing short set-screws
Fig. 4 is an inner face view r7 one of the annular
6 in threaded engagement with said ring and
sheet-metal discs utilized in the illustrative struc
ture to provide thrust-sustaining abutments, said ' adapted to be screwed therein tightly against the
shaft for fastening the inner race-ring thereto.
discs being also components of sealing closures.
In the accompanying drawings, there is shown
For a reason hereinafter appearing, as well as to
Fig. 5 is an enlarged longitudinal section of a
avoid objectionable projections, the set-screws 6
part of the bearing housing, taken on the line
are entirely within said inner race-ring.
A—A of Fig. 1.
Fig. 6 is an enlarged longitudinal section of a 50 For retaining the annular ball bearing unit in
assembly with the housing, and transferring end
part of the illustrative structure organized as a
thrust in either direction from the outer race
non-expanding bearing, the section being taken
ring of said unit to the housing, the illustrative
on the line B—B of Fig. 1.
structure is provided with means now to be de
In the drawings, I denotes a bearing housing,
shown as an interiorly cylindrical member open 55 scribed.
2,405,122
3
Thrust-sustaining abutments between which
said outer race-ring 2 is con?ned are provided
in the housing by annular saucer-shaped sheet
metal discs ‘I and 8 of greater diameter than the
diameter of the housing bore, arranged with their
backs toward said race-ring and with their ?ar
ing rims or ?anges 9 abutting against shoulders
4
preventing relative longitudinal movement be
tween the housing and ball bearing unit. So by
a simple expedient the bearing structure can be
organized either as an expanding or a non-ex
panding bearing.
Sealing closures are provided by the discs ‘I
and 8, associated outer discs I3 carried by the
provided by annular notches or grooves I0 and
inner race-ring, and interposed felt pads I 4 or
II (or ID and I2) in the housing, said notches
packings of other suitable material to prevent
being appropriately formed to accommodate the 10 leakage of lubricant from the bearing and to pre
portions of the disc rims or ?anges of greater
vent passage of dust and foreign particles into the
diameter than that of the housing bore.
bearing. The sheet-metal outer discs I3, formed
In the preferred form shown, the sheet-metal
with central cylindrical ?anges, are tightly ?tted
discs ‘I and 8 have conical ?anges 9 of only mod
or pressed on the inner race-ring 3, and are there
erate slant to the horizontal. The main ?at 15 by ai?xed to said inner race-ring and rotate
portions of the discs and the bends therein where
therewith.
their ?anges join said main ?at portions are of
For lubricating the bearing, grease may be in
less diameter than that of the housing bore, but
troduced through an appropriate ?tting or grease
said ?anges at their free ends are of substantially
plug I5 plugging a grease hole I6 extending ra
greater diameter than the diameter of said bore. 20 dially through the housing wall. When the illus
The annular notches in the housing to receive
trative structure is organized as a non-expand
the disc ?anges are correspondingly shaped and
ing bearing, as shown in Figs. 2 and 6, annular
arranged, providing in the housing interiorily
grooves are created by and between the end faces
conical surfaces in which the disc ?anges ?t, said
of the race-ring 2 and the outer surfaces of the
surfaces extending inwardly or toward the race 25 disc ?anges 9, which parts and the surrounding
ring 2 from shoulders provided by the walls of
interior wall of the housing de?ne the walls of
the notches which are more remote from said
annular grease passages I1. As shown, the grease
race-ring and against which the free ends of the
hole I6 is so located as to lap the annular groove
disc ?anges abut.
II, and therefore it registers with the one of said
As will be apparent, the sheet-metal discs ‘I 30 grease passages I’! which is nearer the annular
and 8 by virtue of their resiliency can be forced
notch I2. The annular grease passages I1 are
into place by pushing them inwardly from the
connected by cross passages provided by appro
opposite open ends of the housing. As they are
priately spaced longitudinal grooves I8 in the in
pushed inwardly or toward the race-ring 2
her wall of the housing I. From said annular pas
through the cylindrical bore of the housing, their 35 sages H, the grease passes into the bearing
?anges are contracted, with accompamring stress
through radial passages provided by radial corm
ing and slight distortion of their main ?at por
gations IS in the discs ‘I and 8, as shown more
tions. As soon as the free ends of their ?anges
clearly in Figs. 4 and 6. For convenience of illus
pass the shoulders provided by the outer walls
tration, it is assumed that the longitudinal pas
of the notches I0 and I2, the resilient discs will 40 sages I8 and radial passages III are arranged so
snap or spring into place with their ?anges in
that some of them are in the plane B-B of Fig. 1
said notches and abutting against said shoulders.
and hence appear in the section of Fig. 6, though
The discs are thereby locked in and held by the
it will be understood of course that the grooves
housing against longitudinal displacement out
I8 may be variously arranged and the discs ‘I
wardly or in directions away from the race-ring. 45 and 8 positioned indiscriminately in various an
E?ectual means are thus provided for sustaining
gular positions, there being no necessity for reg
end thrust in either direction.
istration
of the passages I8 and III as shown in
Although neither of the discs ‘I and 8 can be
Fig.
.
withdrawn or. pulled outwardly without destroy
Fig. 3 shows the illustrative structure organized
ing or ruining it, yet either can be dislodged from , as a bearing of the expanding type, and shows
the annular housing notch with which it is en
the annular ball bearing unit in one of its ex
gaged by forcing it inwardly therefrom, unless
such movement be obstructed by the race-ring 2
abutting the opposite disc. This allows provid
ing in the housing between either end thereof and ,
the race-ring a plurality of annular notches for
successive engagement by the corresponding disc.
In the illustrative structure there are provided in
the housing one annular notch III for the disc ‘I
and two notches II and I2 for the disc 8; the
notches II and I2 being identical and each of
them arranged symmetrically relative to the
notch I0. As will be apparent, the disc 8 can be
engaged either with the notch I2 as in Fig. 3, or
with the notch II as in Fig. 2, being forcibly dis
placeable from the position shown in Fig. 3 to
that shown in Fig. 2. When engaging the notch
I2, the disc 8 is spaced from the disc ‘I a greater
distance than the length of the race-ring 2, thus
permitting limited to and fro longitudinal move
ment of the ball bearing unit relative to the hous
ing to accommodate shaft expansion and contrac
tion. When engaged with the notch I I, the disc 8
is spaced from the disc ‘I just su?iciently to ac
treme positions, namely, in the position in which
the outer race-ring 2 abuts the disc 8. It will be
noted that in movement of said unit to such po
sition the holes in the inner race-ring contain
ing the hidden set-screws 6 are brought within
or practically within the housing, there being no
obstruction to movement by outward projection.
of the set-screws. When the parts of the struc
ture are in the relationship shown in Fig. 3, an
annular grease passage is created at I1“, corre
sponding to the right hand grease passage I‘! in
Fig. 2. Though the grease hole I6 should rfat
communicate with the annular notch or groove I 2,
- it is desirably located for direct communication
with said passage I1“, from which grease may
pass into the bearing through the radial passages
I9 shown in Figs. 4 and 6. In the specific con
struction shown, the longitudinal dimension of
the ?ange 9 of disc 8 is greater than the distance
from the shoulder which it abuts in notch I2 to
the corresponding shoulder in notch II, so that
the portion of said ?ange adjacent to the main
?at body portion of said disc is within or sur
commodate the race-ring 2 between them, thus 75 rounded by or immediately adjacent to the notch
A
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2,405,122
5
6
ll, wherefore the grease hole l6, since it reg
virtue of its resiliency and contractibility can be
isters with the annular notch or groove II, also
registers or connects directly with the annular
forced inwardly from the outer one of said
grooves and sprung into place in the inner one
grease passage lla when such passage is created
of said grooves.
by the relative positioning of parts shown in
Fig. 3.
3. A shaft-bearing comprising a housing and
an annular antifriction bearing unit mounted
It will be apparent that grease can be forced
into the bearing of the illustrative structure in any
therein, said housing having internal annular
,
grooves and the outer race-ring of said unit being
condition thereof, whether organized as an ex
?tted in the housing between said grooves, and
panding or a non-expanding bearing, and in any 10 resilient contractible annular elements of greater
position of the outer race-ring 2 when the struc
diameter than that of said unit sprung into and
seated in said grooves and providing thrust-sus
taining abutments for said race-ring, said ele
ments consisting of saucer-shaped sheet-metal
The speci?c construction shown for obtaining 15 discs having ?at main portions and outwardly
direct connection of the grease hole I 6 both with
?aring conical ?anges, said ?at portions and ad
the right hand passage I‘! of Fig. 2 when created
jacent portions of said ?anges being of less diam
and with the corresponding passage Ila of Fig. 3
eter than the bore of the housing and the free
when created, would permit a spacing of the
ends of ‘said ?anges being of greater diameter
notches II and i2 somewhat further apart than 20 than said bore, said grooves being shallow notches
as shown without altering the essential character
having relatively short conical walls and outer
of such speci?c construction or destroying the
end walls forming thrust shoulders, said ?anges
effect of obtaining such direct connections. Such
being sprung into and ?tting said notches and
effect might also be obtained in other speci?c
bearing at their free ends against said shoulders.
ways. For example, if the notch l2 were spaced 25
4. A shaft-bearing comprising a housing and
from H such a further distance that an exte
an annular antifriction bearing unit mounted
riorly cylindrical portion of the race-ring 2 (as
therein, said housing having internal annular
distinguished from the rounded corner end por
grooves and the outer race-ring of said unit
tion thereof) would come directly under notch
being ?tted in the housing between said grooves,
II when said race-ring abuts disc 8 engaging 30 and resilient contractible annular elements of
notch l2, nevertheless the grease hole l6 might
greater diameter than that of said unit sprung
be located somewhat to the right from the posi
into and seated in said grooves and providing
tion shown and in registration or direct connec
thrust-sustaining abutments for said race-ring,
tion with notch H and also with passage I‘!a
said elements consisting of saucer-shaped sheet
when created, though not in connection with 35 metal discs arranged with their backs toward
said race-ring and their rims ?tting said grooves
notch l2. Moreover, even if the hole I6 were not
located as last suggested, grease forced there
and bearing at their free ends against shoulders
from into the notch or grooove ll could pass by
provided by the groove walls remote from said
longitudinal passages l8 to the end of the race
race-ring, there being created between said race
ring 2 adjacent the disc 1 and thence to the 40 ring and the rim of at least one of said discs
bearing.
when said race-ring abuts the latter an annular
Assuming the illustrative structure to be manu
grease passage, said one of said discs being radi
ture is organized as an expanding bearing, since
said race-ring can never in any position be di
rectly under nor block the grease hole 16.
factured as an expanding bearing, it can be con
ally corrugated thereby providing radial grease
verted into a non-expanding bearing by forcing
passages communicating with said annular
grease passage, and means for introducing grease
into said annular passage.
5. A shaft-bearing comprising a housing and
an annular antifriction bearing unit mounted
therein and having within the housing an an
the disc 8 from notch I2 to notch l l by a suitable
annular tool passing around the associated disc
I3, and forcing the latter inwardly a correspond
ing amount.
I claim:
1. A shaft bearing comprising a housing and 50 nular saucer-shaped sheet-metal disc arranged
an annular antifriction bearing unit mounted
with its back toward the outer race-ring of said
therein and having within the housing a resilient
unit, said disc having a ?aring rim of greater
contractible annular element abuttable by one
diameter at its free end than the diameter of said
unit and said housing having a pair of internal
end of the outer race-ring of said unit, said ele
ment being of greater diameter than that of said 55 annular notches in either of which the free end
unit and said housing having a pair of internal
of said rim can be ?tted and in a selected one
annular grooves in either of which said element
of which it is ?tted, there being in the housing
can be seated and in a selected one of which it is
thrust-sustaining means between which and said
seated, said element when seated in either of
disc the outer race-ring of said unit is retained,
said grooves being held against longitudinal dis 60 said disc when held in the outer one of said
placement by end thrust of said race-ring, there
notches being spaced from said means a sufficient
being in the housing thrust-sustaining means
distance to allow'iimited longitudinal movement
abuttable by the opposite end of said race-ring
of said race-ring relative to the housing, and said
and said grooves being so located that said ele
means and disc 1r'tilhen held in the inner one of
ment when seated in the outer one of said 65 said notches holding the interposed race-ring
against said movement.
distance to permit limited longitudinal move
6. A shaft-bearing of the construction de
ment of the interposed race-ring‘ relative to the
scribed in claim 5 wherein the proportions are
housing and when seated in the inner one of
such that when the race-ring abuts said disc in
said grooves said element and means hold said 70 either of the two positions thereof an annular
race-ring against such relative movement.
grease passage is created between said race-ring
2. A shaft-bearing of the construction de
and rim of said disc, there being in the housing
scribed in claim 1 wherein said annular element
a grease inlet hole positioned for direct connec
is a saucer-shaped sheet-metal disc arranged
tion with either such passage when created, and
with its back toward said race-ring and which by 75 said disc being radially corrugated and thereby
grooves is spaced from said means a su?icient
n
7
2,405,122
providing radial grease passages communicating
with said annular grease passages.
8
greater diameter than that of said unit and said
housing having an internal annular notch or
groove in which the outer edge portion of the
ing a housing and an annular antifriction bear
disc is ?tted, the disc being held against longi
ing unit mounted therein and having withing the
tudinal displacement outwardly and providing a
housing an annular saucer-shaped sheet-metal
thrust-sustaining abutment in contact with one
disc arranged with its back toward the outer
end of said race-ring, a. thrust-sustaining abut
race-ring of said unit, said disc being of greater
ment in contact with the opposite end or said
diameter than that of said unit and said housing
race-ring, there being an annular grease passage
having an internal annular notch or groove in 10 between said race-ring and rim of said disc and
which the outer edge portion of the disc is ?tted,
communicating radial grease passages between
the disc being held against longitudinal displace
said race-ring and disc, and means for introduc
ment outwardly and providing a thrust-sustain
ing grease into said annular passage.
ing abutment for one end of the housing, there
9. A shaft bearing comprising a housing and
being a thrust-sustaining abutment for the op 15 an annular antiiriction bearing unit mounted _
posite end of said race-ring, the distance between
therein and means for sealing and retaining said
said abutments being greater than the length of
unit in the housing comprising annular sheet
said race-ring, there being created when said
metal inner discs having outwardly extending
race-ring abuts said disc an annular grease pas
conical ?anges which at their free ends are of
sage between them, said disc being radially cor 20 greater diameter than that 01 said unit and
rugated and thereby providing radial grease pas
seated in annular grooves in the housing and
sages communicating with said annular passages,
held against longitudinal displacement outward
and the housing having a grease inlet hole located
ly, said discs so held providing thrust-sustaining
in direct communication with said annular pas
abutments for the outer race-ring of said unit,
sages, the proportions being such that said hole 25 centrally ?anged outer discs ?tted on and held
cannot be covered or blocked by said race-ring in
by the inner race-ring of said unit, and packings
any position thereof.
between said inner and outer discs, the central
8. A shaft-bearing of non-expanding type
?anges of said outer discs extending within the
comprising a housing and an annular antifriction
center openings of said inner discs and the
bearing unit mounted therein and having within 30 ?anges of the latter extending around said outer
the housing an annular saucer-shaped sheet
discs.
metal disc arranged with its back toward the
DAVID FIRTH.
outer race-ring 01' said unit, said disc being of
7. A shaft-bearing of expanding type compris
N
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