Note: Descriptions are shown in the official language in which they were submitted.
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Back~round and Summarv or_the Invention
This invention relates to improved pedestal type side
frames, useful, for example, in trucks for railway vehicles.
More particularly, the invention relates to such side frames
wherein improved and longer lasti~g wear protection is
obtained.
Wear liners are often provided between the bearing
adapter and the roof of the pedestal jaw of a side frame
in which a roller bearing assembly is received. Such wear
liners act to reduce wear in the pedestal roof caused by
oscillating motions of the side frame relative to the wheel
and axle assembly. These wear liners are often welded to
the pedestal roof. Under heavy duty~ e.g., high speed
service~ thsse welds tsnd tc fail. When thess welds fail,
the wear liner may become displ2ced or even lost~ thus
resulting in increased and undesir2ble wear in the pedestal
roof. Clearly, it wouLd be advantage~us to provide an
; ~mproved means for securing the wear liner in ?lace.Therefore, one object of ,he prssent lnvention }s to
; provide an improved pedestal type side frame.
Another object of the invention is to provide an
~; improved wear liner for use in a pedestal type side frame.
.
A still further object of the invention is ~o pro~ide
an improved pedestal type side ~-ame in which the wear
liner is ~aintained securely in place. Other objects and
~; 25 advanta~es of the present i~vention will beco~e apparent
hereinalter. ,~
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An improved pedestal type side f~ame has now been
discovered. Such side frames involve an integrally
rormed do-~nwardly open jaw which inc ludes a roof and
depending legs, which legs have substantially opposed stop
lugs. A bearing assembly is recei~ed in the jaw. A
bearing adapter overlays ~his bearing assembly and a wear
liner is disposed between the roof and adapter to, for
example, reduce or eliminate wear on the roof. In o~e
embodiment the present improvement compri~es utilizing a
wear liner which includes at least two projections, i.e.
one pair of projections, extending upwardly from the
lateral edges of the wear liner. These projections are
positioned so ~s to cooperate, e.g., be engageable, with
at least a portion of the Lateral edges of the pedestal
roof and tnereby inhibit movement o~ the wear liner, e.g.,
; in the longitudinal direction, relative to the pedestal
;~
:~` roof. Preferably, the substantially mutually opposing
. ,
projections or the wear liner act to provide a spring
type retaining means to inhibit the wear liner from
- 20 mo~ing n tne langitudinal direction relative to tne
ped2stal roofO
Many of the embodiments or the present side frame do
not re~uire that the wear liner be attached, e.g.g welded
to the pedes tal roor. However, in certain embodiments of
the prescnt invention, such attach~ent provides additional
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g
bene~its. For example, in one preferred embodiment~ ~he
wear liner ls attached, preferably welded, to the pedestal
roof by attaching~ 2.g., welding, at least portions of two
of the wear liner projections to the pedestal roof. Such
attachment is neither directly above nor below the wear
surface or~ the liner and, therefore, has increased
resistance ~o failure.
In a further preferred embodiment, the wear liner
~ includes at leas t two substantially mutually opposing
L0 downwardly depending legs which terminate closely adjacent
to the substantially opposed stop lugs. These downwardly
depending legs and stop lugs are positioned so as to be
capable of cooperating to inhibit the movement of the wear
liner, e.g., in the later21 direction, eiative to the
pedestal roof, for example, in the event of ~eld railure.
In one embo~iment, the present invention provides a side
frame wherein the wear liner is inhibited from moving in
;~ the longitudinal direction by upwardly extending projections
and from moving in the lateral direction by downwardly
depending legs. In this embodiment~ no weldinc or other
`~ means of 2 tta~hing the wear liner to the pedestal roof isrequired. However, such att~chment techniques may be
employed to provide an extra measure wear liner movement
prevention.
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In general, and except as otherwise provided for
herein, the side Erame of the present invention may be
fabricated from any suitable material or combination of
materials of construction. The material of construction used
for each component of the present apparatus may be dependent
upon the particular application involved. Of course, the
side frame should be made of materials which are
substantially unaffectedr except for normal wear and tear, by
the conditions at which the apparatus is normally operated.
These and other aspects and advantages of the present
invention are set forth in the following detailed description
and claims, particularly when considered in conjunction with
the accompan~ing drawings in which like parts bear like
reference numerals.
Description of the Drawings
Figure 1 is a partial front view of one end of a
pedestal type side frame including one embodiment of the
present invention.
Figure 2 is a bottom view of the structure of Figure 1
~; ~0 with certain parts removed for clarity.
Figure 3 is a top perspective view of the wear liner
~.
~; used in the structure of Figure 1.
; Figure 4 is a partial front view of one end of a
~- pedestal type side frame including another embodiment of the
present invention.
Figure 5 is a bottom view of the structure of Figure 4
with certain parts removed for clarity.
Figure 6 is a top perspective view of the wear liner
used in the structure of Figure 4.
Figure 7 is a partial front view of one end oE a
pedestal type side frame including a further embodiment of
the present invention.
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Fiyure 8 is a bottom view of the structure of Figure 7
with certain parts removed for clarity.
Figure 9 is a top perspective view of the wear liner
used in the structure of Fiyure 7.
Description of the Preferred Embodiment
... .. . .
Referriny now to the drawings, and particularly to
Fiyures 1, 4, and 7, a pedestal type side frame is indicated
generally at 10 and includes a downwardly open jaw 12 defined
by pedestal roof 14 and depending legs 16 and 18. It should ~ -~
10 be understood that a side frame is symmetrical longitudinally ~;
and each end includes a pedestal jaw 12. The pedestal jaw 12
; is arranged to receive a conventional roller bearing assembly
20 and a bearing adapter 22 which is restrained from lateral
movement by a pair of opposed stop lugs 19.
Positioned between the bearing adapter 22 and the
pedestal roof 14 is a wear liner indicated generally at 24 in
Figures 1, 2 and 3; at 44 in Figures 4, 5 and 6; at 64 in
-: : .
Figures 7, 8 and 9; and at 84 in Figures 10, 11 and 12. Each -~
of these wear liners 24, 44, 64 and 84 will be described in
detail hereinafter.
,
Referring now to the embodiment shown in Fiyures 1, 2
-~ and 3, wear liner 24 includes liner body 26 which provides
contact surfaces with the pedestal roof 14 from above and
with the bearing adapter 22 from below. Wear liner 24 also
~ .,
~ includes two downwardly depending, i.e., from liner body 26,
- ~ legs 28 and 30 which are sized to be received in the mutually
,
facing recesses 32, for, in the opposing side lugs 19, this
~` arranyement provides a degree of restraint of movement of the
wear liner 24 relative to the pedestal roof 14.
Wear liner 24 also includes two pairs of mutually
~opposed projections 34, 3S and 36, 37 which extend upwardly
from the generally flat surface of liner body 26.
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Projections 34, 35 and 36, 37 are positioned to receive
pedestal roof 14 and to provide a certain degree of spriny
action to inhibit movement of the wear liner 24 relative to
the pedestal roof 14. Thus, projections 34, 35 and 36, 37
cooperate wi-th pedestal roof 14 to further inhibit or
restrain movement of the wear liner 24 re:Lative to the
pedestal roof 14. The embodiment illustrated in Figures 1, 2
and 3 requires no physical attachment, e.g., welding, of the
wear liner 24 to the pedestal roof 14.
With regard to Figures 4, 5 and 6, wear liner 44
includes liner body 46 which functions similarly to liner
body 26, described previously. Further wear liner 44
includes two downwardly dependin~ legs 48 and 50 which
cool~erate with stop lugs 19 in a manner similar to legs 28
and 30 noted above.
Wear liner 44 further includes a single pair of
projections 52 and 53 extending substantially upwardly from
opposing lateral edges of liner body 46. Each of the
~` projections 52 and 53 include recesses 54 and 55,
respectively. However, the bottom of each of the recesses 54
and 55 is above the upper surface of liner body 46.
Projections 52 and 53 are positioned to receive pedestal roof
14 and to provide a certain degree of spring action to
;~ inhibit movement of wear liner 44 relative to pedestal roof
14~ To further inhibit such movement, wear liner 44 is
attached to pedestal roof 14 by welds located in the recesses
` 54 and 55 of projections S2 and 53. Since these wélds are
located a distance away from, i.e., above, the wear surfaces
of the wear liner 44, these welds in recesses 54 and 55 have
reduced tendency to failure.
The embodiment illustrated in Figures 7, 8 and 9
involves wear liner 64 which includes liner body 66~ Liner
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body 66 functions similarly to liner bodies 26 and 4~. Wear
liner 64 further includes two pairs of mutually opposing
depending legs 68 r 69 and 70 and 71. Depending legs 68 and
70 along with liner body 66 form recess 74, while mutually
facing recess 76 is defined by depending :Legs 69 and 71 and
liner body 66. In this embodiment stop lugs 19 are formed
with mutually facing extensions 79 and 80 which are sized and
positioned to be received into recesses 76 and 78l
respectively. ~n this manner stop lugs 19 cooperate with
depending legs 68, 69 and 70, 71 to inhibit movement of the
wear liner 64 relative to the pedestal roof 14.
Wear liner 64 further includes a single pair of
substantially mutually opposing projections 81 and 82 which
extend in a generally upward direction from the flat surface
of liner body ~6. Projections 81 and 82 are positioned to
receive pedestal roof 14 and to provide a certain degree of
spring action to inhibit movement of the wear liner 64
relative to the pedestal roof 14.
The present invention provides a pedestal type side
frame having substantial benefits, e.g., long life/ reduced
maintenance and improved service reliability. Movement of
the wear liner in both the longitudinal and lateral
directions relative to the pedestal roof may be inhibited.
Further the need for conventional, failure prone welds is
reduced or eliminated and replaced by simple mechanical
cooperation between various components of the side frame
assembly.
While the invention has been described with respect to
various specific examples and embodiments, it is to be
understood that the invention is not limited thereto and that
it can be variously practiced within the scope of the
following claims.
