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Патент USA US2410927

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Nov. 12, 1946.
‘r. L. CALLAHAN ET AL
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BEARING AND SEAL CONSTRUCTION ' ‘
Filed May 17, 1943
- 2,410,927
2,410,927”
Patented Nov. 12, 1946
UNITED STATES PATENT OFFICE
2,410,927
_
BEARING AND SEAL CONSTRUCTION
Thomas L. Callahan and Jay .Weaver, Richmond,
Ind., assignors to International Harvester Com
pany, a corporation of New Jersey
Application May 17, 1943, Serial No. 487,224 '
3 Claims. (Cl. 308-19)
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>
2
1
This invention relates to a seal construction.
seal, which is held in a retaining member having
integral pieces extending therefrom into engage
More speci?cally it relates to the application of
such a construction to a furrow opener.
ment with a support for the furrow opener in
such a manner as to hold- the resilient seal
It is a considerable problem to keep dirt and
other extraneous matter out of the bearing of a
furrowopener, since the furrow opener normal
ly runs in the ground. A very ef?cient sealing of
the bearing is required. On the other hand, it
is known, though perhaps not in the case of fur
row openers, to provide a seal construction in
volving a seal against which another rotating
against lateral movement and to urge the metal
seal member against the rotating member se
cured to the disk furrow opener. The metal seal
is locked to the retaining member so that rela
tive rotation between these parts is prevented.
10
metal part slides, and a yielding seal of rubber or
1 absorbent material, which is saved from wear be-
-
In the drawing:
Figure 1 is a perspective view with parts re
moved of the novel seal construction of the pres
ent invention applied to‘ a disk opener;
v
cause it contacts only stationary parts. The en
Figure 2 is a sectional view taken along the
tire wear in the seal construction is assumed by 15 line 2-2 of Figure 1;
_
‘
the metal seal. One of the di?iculties with an
Figure 3 is a perspective view of a member that
arrangement of this sort is that the variation in
serves asa bearing support for the disk opener;
the direction of force applied by the rotating
Figure 4 is a perspective view of a stationary
metal part to the metal seal will cause the metal
metal ‘seal; ’
seal to tilt with respect to the supporting struc 20 Figure 5 is a perspective view of a portion of a’
ture and locking lugs thereof for holding the
metal seal against rotation. The result is wear
support to which the bearing support for the disk
opener is attached; and
between the locking lugs and the parts of the
Figure 6 is a perspective view of a retaining
metal seal it contacts. Furthermore,_'the rota
a member.
tional force tending to turn the metal seal causes 25 Reference character It! indicates a support de
the seal to tilt around the locking lugs and so
pending from a carrying frame, not shown. The
to create a gap for dust to enter. Another dis- ‘
depending support I0 has a boss ll projecting
advantageiisthat the yielding seal, though not‘
therefrom and as shown in Figure 5 having op
posite ?at sides l2 and connecting arcuate sides
that its sealing ef?ciency is seriously affected. 30 IS. A bearing support l4 engages the support I 0,
in contact with rotating parts, may be moved so
. The present application has to do with improve
ments in this type of seal construction and the
applying of such a construction to a furrow
opener.
_
’
“
H
An object of the present invention is to‘ pro
vide an improved seal construction.
w
receiving the boss H in a recess. which is circu
lar except for a ?at side It. The ?at side l6 of
the recess 15 engages one ?at side 12 of the boss
II and thus prevents relative rotation between
35 the bearing support I‘ and the depending sup
port It). A bolt l1 and a nut l8 secure the bear
A further object is to improve a seal construc
ing support 14 upon the depending support Ill,
tion comprising a metal seal having sliding con
the 'bolt H extending through an opening It‘ in
tact with a rotating part and a resilient seal con
the depending support I 0 and an opening IS in
tacting only stationary parts.
. 40 the bearing support l4, and a head 20 of the bolt
Another object is the provision of an improved
ll resting within an enlarged portion 2| of the
seal construction for the furrow opener.
_ opening’ I9. The bearing support It has a radial
Still another object is to provide a furrow
bearing ?ange 22 having afrusto-con'ical outer
opener with a seal construction involving a metal
surface 23 and flat end surfaces '28 and 25.‘ A seal and a resilient seal.
45 jdisk furrow opener 26, positioned adjacent the
Other objects will appear from the disclosure.
end surface 25 of the radial ?ange 22 of the sup
according to the present invention, a member
secured to a disk furrow opener rotates in slid
ing sealing contact with a stationary metallic
seal.
porting member IQ, is Journaled on the bearing '
support it by means of a rotatable metal mem
ber 21 secured to the disk 26 by rivets 28. A,
The member secured to the disk furrow 50 gasket 29 spaces the member 2'! and the disk 26.
opener is dished so that there is provided between
the contacting faces of the member and the metal
_ The member El-has an inwardly directed radial
?ange 80 having one flat end face 3! in engage
seal a space for lubricant extending outwardly to
ment with the ?at end surface 2% of thebearing
a narrow region of contact between these parts.
?ange 22 of the bearing support It and another
In engagement with the metal seal is a resilient 65 end face 32 which is dished. Engaging the
2,410,927
3
4
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of the radial ?ange 30 of the rotatable member
21 and an adjacent portion of the bearing sup
21 is a ?at end face 33 of a metal seal 34. A
second end face 35 of the metal seal 34 is engaged
by a packing or sealing member 36 of suitable
material, such as felt or rubber. The seal 33 is
partially embraced and retained in a cupped re
taining member 31 having a circular side portion
33 and a ?at end portion 39. The metal seal 34
has at the end face 35 a ?ange 40 having dia
metrically opposed notches 4|, which receive out
wardly extending projections 4|l on the retain
ing member 31.
A
municate with a space 51 between the inner edge
dished face 32 of the rotatable bearing membe
port i4. The space 51 communicates with a space
58 between the dished face 33 of the ?ange 33
of the rotatable bearing member 21 and the ?at
face 33 on the metal seal 34. Escape of lubricant
in an outward direction from beyond a region
of contact 53 between the bearing support 14 and
10 the inner surface of the stationary member 34 is
,
prevented by sealing contact of the resilient seal
36 with the end face 35 of the metal seal 34.
Escape of lubricant in an axial direction is pre
As shown in Figure 6, the retaining member
‘ vented by sealing contact of the inner peripheral '
31 has pieces 42 struck from the ?at end por
tion 39 and extending at a slight angle thereto 15 surface of the resilient seal 33 with the bearing
support l4. Sealing at this region is most im
(or at a small angle to a planetransverse to the
portant and is probably more di?icult than seal
axis of rotation) and terminating in end portions
ing between the seals 34 and 33, since the resil
43 extending at right angles to the ?at end por
ient seal 36 may have some movement with re
tion 33 of the retainer 31. As seen in Figure 5,
the depending support it is provided with a 20 spect to the bearing support 14.
Lubricant is, of course. supplied through the
groove 44 and three ribs 45 extending across the
"lubricant nipple l3 and passes through the pas
groove 44. The groove 44 has an inner side .44
sage 32, thevgroove 53, the space 44, and the
which extends a greater distance from the base
grooves 53 and 86 into the spaces 51 and 53.
of the groove than does an outer side 41 of the
Because the contacting end faces 32 and 33 on
groove so that there is provided a surface 43 in
the rotatable member 31 in the- metal seal 34
wardly of the groove 44 and outwardly of the
are, respectively, dished and flat, these surfaces
boss ll higher than a surface 43 outwardly of
contact only along a narrow region 43 outwardly
the groove 44. The diameter of the inner side
of the space 53. This region 43 is, at the start.
43 ofthe groove 44 is slightly larger than the
diameter of a circle determined by the portions 30 theoretically a line but, as wear progresses, has
a measurable width. Lubricant may escape from
43 on the pieces 42 struck from the end surface
the space 33 outwardly through the region of
33 of the retainer 31 so that the pieces 4! are
contact 33, since this contact is made only by
sprung outwardly as the endportions 43 are in
metal parts that are formed of unyielding mate
serted into the groove 44 and the end portions
43 grip the inner side 43 of the groove 44. The 35 rial and are resiliently held against one. another
by the yielding form of the spring pieces 43 on
gripping of the inner side 43 of the groove 44
the retainer 31, However, a slight escape of lu
by the end portions 43 causes the retaining mem
her 31 to be secured to the depending support I3 _ bricant is not disadvantageous. Since there is
a de?nite space 33 de?ned by the ?at surface
in such a, manner that movement of the retain
ing member 31 transverse to the axis of rotation 40 face 33 and the dished face 32, there is consider
of the disk 33 is prevented. This also prevents , able lubricant immediately inward of the ‘region
of contact 60 which prevents the entrance of
a similar transverse movement of the sealing
extraneous material through the region of con
member 33 for a purpose to be described pres
tact it. It has been stated that the springing
ently.
.
~
The retaining member 31 may move angularly 45 out of the pieces 43 on the retaining member
31 provides gripping engagement of the end por
' with respect to the depending support Ill but only
to the extent permitted by the projections 45 in
the groove 44. After a certain angular move
ment, the end portions 43 on the pieces 43 con
tact the projections 43, and further angular
movement is prevented. Since the end portions
43 extend substantially along the axis of rota
tion, they will cooperate with the ribs 43 to pre
vent angular movement of the retaining member
21 regardless of the direction of rotation of the
disk 28. Thus, the retaining member 31 is held
against rotation with respect to the depending ;
support Ill, whether the disk it extends trans
versely to the left of the depending support I.
of the direction of movement through the ground
or tofthe right.
,
_
Lubricant is applied through a lubricant nip
ple 50 secured to the depending support It in
an enlarged end 51 of a lubricant passage 53.
The passage 52 communicates with a groove 53 in
the opening is in the vbearing support i4 and in
the enlargement 2| of the opening 19. The
groove ‘53’ communicates with a space it between
the furrow disk 26 and the end face 25 of the
tions 43 with the inner side 44 of the groove 44 A
from the depending support III, causing the re
taining member 31 to be held against movement
transverse to the axis of rotation, and this in
turn prevents such movement of the resilient
‘seal 36 contained within the retaining ring 31. -
It is exceedingly advantageous to hold the resil-_
ient seal against such transverse movement, for
when it is so held, its inner diameter remains
constant, and thus there is maintained a good
sealing relation between the inner side thereof
and the bearing support 14. It is believed to
be new, in a seal construction involving a metal
or unyielding seal in sealing contact with a ro
tating part and a yielding seal formed of mate
rial such as felt or rubber, for the yielding seal
to have its inner peripheral surface with a sup
porting member.
The pieces 42 struck from the ?at end 38 of
the ‘retaining member 31 constitute resilient
means which urge the resilient seal 38 against
the metal seal 34 and the'metal seal 34 against
the rotatable member 21. Thus, there is a sui'ii
, radial ?ange 22. This space-communicates with 70 cient sealing maintained between the resilient
three grooves 55 in the frusto-conical surface 23
of the radial ?ange 22 of the bearing support M.
The grooves 55 are shown in Figure 3, and they
in turn communicate with grooves 56 in the end
face 24 e! the ?ange 22, The grooves 56 com
seal 86 and the face 35 of the metal seal 34 and
between the rotatable member 21 and the metal
seal 36 at the region of contact to. The notches
$1 in the ?ange 40 of the stationary bearing
member 34 cooperate with the projections 4!‘ on
2,410,927
5
the retaining member 3? so that the retaining
member 37 prevents rotation of the stationary
bearing member 34. Since axially directed
ring 36 has been stated to be formed of felt or
rubber or any other suitable material that is re
silient ‘or yielding.
forces on the disk 26 will cause
of both the metal seal 33 and
there is no wear at the notches
seal 89 and the projections M“
axial movement
the retainer 31,
5| in the metal
on the retainer
31 due to relative movement of these parts. Fur
thermore, any tendency of the metal seal 35 to
The intention is to limit the invention only
within the scope of the appended claims.
What is claimed is:
1. In combination, a support having a bearing
?ange, a rotatable member of unyielding mate
rial rotatably bearing against the flange, a seal-‘
tilt about locking projections Ma due to rotational 10 ing ring of unyielding material having a face in
forces on the metal seal 34 and so to provide a
sliding sealing contact with a face of the rotat
able member, a sealing ring of yielding material
gap for dust to enter is avoided, because the
having a face in sealing contact With the un
locking projections ?le, being on the retainer 31,
yielding sealing ring and an inner peripheral sur
tilt with the metal seal 34.
Figure 2 shows the thickness of the packing 15 face in sealing contact with the support, the con
member 3'5 to be su?iclent to hold the stationary
tacting faces of ‘the rotatable member and the
unyielding sealing‘ring being so shaped as to con
bearing member 34 out of contact with the re
tact only at a radially outermost narrow region
taining member 31 except for contact at the
so as to provide radially inwardly thereof a
notches 6| and the projections 4|“. However,
wedge-shaped space between the faces for lu
the sealing member 35 may be compressed suin
bricant out to the actual region of contact to keep
ciently so that there is contact between the cir
the contact region closed by lubricant and thus
cular portion 38 of the retaining member 31 and
to prevent the entrance of foreign material from
the stationary bearing member 34. Thus, the
the exterior.
stationary bearing member is given the resilient
2. In combination, a support having a bearing
support of the retaining member, and the resil 25
portion, a rotatable member of unyielding ma
iency of the pieces 52 struck- from the retaining
member 3] permits the stationary member 34
and the retaining member 3'5 to tilt somewhat
terial rotatably bearing against the bearing por
tion, a sealing ring member of unyielding mate
rial having a face in sliding sealing contact with
upon changes in direction of pressure applied to
the furrow disk 26.
30 a face of the rotatable member,_ the contacting
faces of the members being so shaped as to con
It will be apparent from the foregoing descrip
,tact' only at ‘a radially outermost narrow region
tion that a new and novel bearing and seal con
so as to provide radially inwardly thereof a space
struction has been provided. This construction
between the members for lubricant out to the ac
per se has novelty, and there is novelty in its ap
plication to a furrow opener. One point of 35 tual region of contact to keep the contact region
closed by lubricant and thus to prevent the en
novelty is the preventionv of .rotation of an un
trance of foreign material from the exterior, a
yielding seal by keying to a retaining member for
sealing ring of yielding material having a face in
a yielding seal member, the retaining'member
sealing contact with the unyielding sealing ring
being resiliently mounted so that it tilts with
the unyielding seal and thus prevents-wear upon 40 member and an inner peripheral surface in seal
ing contact with the support, a retaining ring
tilting due to relative movement of the parts and
partially embracing the yielding sealing ring and
opening of the seal due to tilting. Another point
of novelty is the supporting of a resilient seal in
a retainer that is held against movement trans
verse to the axis of rotation. Another point of
novelty is the provision of integral extensions
upon a retainer for a resilient'seal which serve
not only to grip a support to prevent movement
transverse to the axis of vrotation and rotation
itself but also to serve as a resilient means for
urging the resilient 'seal contained in the re
tainer against any unyielding seal. Still another
point of novelty is the shaping of contacting sur
faces of an unyielding seal and a rotatable mem=
her in such a way that actual contact is pro=
vided only over an outermost region, and there
isia substantial space inwardly of the outermost ’
having portions cooperating with portions of the
unyielding sealing ring member to prevent rela
tive rotation therebetween, and resilient means
acting between the support and the retaining ring
to prevent rotation of the retaining ring with
respect to the support and to urge the yielding
sealing ring against the unyielding sealing ring
member and the unyielding sealing ring member
against the rotatable member.
3. In combination, a support having a bearing
?ange, a gotatable disk opener adjacent the‘
?ange, a member secured to the disk opener and
rotatably bearing against the bearing ?ange, an
unyielding sealing ring mounted upon the sup
port and having sliding sealing contact with the
member, a yielding sealing ring having a face in
region for lubricant which will prevent the en
sealing contact with the unyielding sealing ring
trance of foreign material through the said nar
row outermost region of contact. Another novel 60 and an inner peripheral surface in sealing con
tact with the support, a retaining ring holding
feature is provision of sealing contact between
the yielding sealing ring andv having portions
the support and an inner peripheral surface of
cooperating with portions-on the unyielding seal
the yielding seal.
ing ring to prevent relative rotation of the re
Various parts such as the rotatable member 2?,
the metal seal 36, the resilient seal 36, and the 65 taining ring and the unyielding sealing ring, and
resilient means urging the yielding sealing ring
retainer 3? have been described as members, and
against the unyielding-sealing ring and the un
~ it should be evident that they may be also de
. scribed as rings since they take this form. The
member 2? and the ‘sealing ring 34 are normally
formed of metal. and thus they may be consid 70
ered to be hard and unyielding. The sealing
/
yielding sealing ring against‘the member.
THOMAS L. CALLAHAN. "
JAY WEAVER.
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