US2913288A

US2913288A - Resilient side bearings

Info

Publication number: US2913288A
Application number: US632378A
Authority: US
Inventors: Blattner Elizabeth
Original assignee: Symington Wayne Corp
Current assignee: Symington Wayne Corp
Priority date: 1957-01-03
Filing date: 1957-01-03
Publication date: 1959-11-17
Anticipated expiration: 1976-11-17

Description

E. H. BLATTNER RESILIENT SIDE BEARINGS Filed Jan. 3, 1957 Nov. 17, 1959 his Attorney RESILENT SEE BEARINGS Emil H. Blattner, Williamsville, NX.; Elizabeth Blattner, executrir of said JEmil H. Blattner, deceased, assignor to Symington Wayne Corporation, a corporation of Maryland Application Ilanuary 3, 1957, Serial No. 632,378

S Claims. (Cl. 308-138) rlhis invention relates to resilient side bearings for railway vehicles and has for its primary object the provision of an improved resilient side bearing which is selfsnubbing, rugged in construction and, while relatively inexpensive to manufacture, is effective to minimize car body roll and inhibit the tendency of the Wheels to hunt.

Another object of the invention is to provide a resilient side bearing formed of three pieces, a base member open at top and bottom, a cap member in the base member and a rubber cushion housed in the base member and yieldably urging the cap member upwardly, wherein upward movement of the cap member relative to the base member is limited by means integral with the members and the base member serves to limit the maximum compression of the side bearing by engaging means xed togand depending from the car body.

A further object of the invention is to provide an improved three-piece resilient side bearing of the character described wherein the side bearing clearance is readily gaugeable by measuring the distance between the base member and the depending means iixed to the car body.

Other objects and advantages of the invention will appear hereinafter in the detailed description, be particular- 1y pointed out in the appended claims and be illustrated in the accompanying drawings in which:

Figure 1 is a front elevational View of a preferred embodiment of the resilient side bearing of the present invention with a portion shown in a section taken along the lines 1 1 of Figure-2;

Figure 2 is a plan view of the side bearing of Figure 1 with a portion shown in a section taken along the lines 2-2 of Figure l; and

Figurev 3 is an end elevational view with a portion shown in a section taken along the lines 3 3 of Figure 2.

Referring now in detail to the accompanying drawings in which like reference characters designate like parts, the improved resilient side bearing of the present invention, While illustrated uninstalled, is designed for installation on a side frame (not shown) or bolster (not shown) of a railway truck (not shown) between the truck and a railway car body (not shown) and to engage a rigid earing member or plate- (not shown) fixed to and depending from a bolster or other part (not shown) of the nnderframe (not shown) of the car body, a typical installation being illustrated in my kco-pending application Serial No. 341,757, filed March 11, 1953, now Patent No. 2,788,250, issued on April 9, 1957. The side bearing is comprised of a base member or housing 1, a cap member 2 housed in the base member and a rubber cushion 3 within the base member 1 below and yieldably acting on the cap member 2 to urge the latter upwardly relative to the base member. As will become apparent, each of the base and cap members is designed and particularly lends itself to manufacture as a one piece steel casting.

The base member 1 is open at top and bottom and has a central aperture, opening or passage 4 extending vernited tates Patent Mice tically therethrough and bounded or conned laterallyl or horizontally by an upstanding, upright or continuous lateral wall 5 of the base member. In the illustrated side bearing the aperture 4 is substantially rectangular in horizontal cross-section and the continuous wall 5 isr formed by a pair of side walls 6, connected at their ends by a pair of end walls 7, the several walls being upstanding or substantially vertically directed and the walls of each pair being transversely, laterally or horizontally spaced from each other.

For mounting the base member on a side frame or bolster of the previously mentioned railway truck, the lateral wall 5 is provided with a plurality of feet or bottom flanges 8, integral with and outstanding or extending outwardly from the lower portion of-the lateral wall at opposite sides thereof, the feet being substantially coplanar in their underfaces 9 with the Walls lower extremity or bottom edge 10. Two such feet are provided in the illustrated embodiment, one outstanding from each of the end Walls 7 and each attachable to the side frame or bolster by welding or, and more preferably, by bolting or riveting, having for this latter purpose a vertically directed rivet or bolt hole 11.

The lateral wall 5, between or clear of the feet 8, is

interrupted at opposite sides by a plurality of downwardly opening cavities or recesses 12 extending upwardly from its lower extremity 1li, each of the cavities 12 here extending through one of the side walls 6 intermediate its lateral extremities, With the wall preferably reinforced along the inner or upper edge or boundary 13 of its cavity by a reinforcing flange 14.

Y The cap member 2, housed in the base member 1, lits or seats in the central aperture 4 and is confined laterally or horizontally by the lateral wall 5 of the base member. The cap member has a substantially at, horizontally directed top or bearing Wall 15, which normally projects above the upper edge or-extremity 16 of the base member and is adapted to bear against or engage the aforementioned bearing member depending from the car body. For long life, the cap member desirably has as its upper face 17 either the upper surface of the top wall 15, hardened by ame hardening or carburizing, or that of a wear plate 18 of brake lining or like wear-resistant material, bonded or otherwise attached to the top wall. The horizontally directed, substantially flat bottom wall 19 of the cap member 2 is spaced vertically below and disposed substantially parallel to its top wall 15. The intermediate portion 20 of the cap member connecting Iand spacing its

topand bottom Walls

15 and 19 has a substantially vertically directed or upright outer or lateral face 21 confronting and disposed substantially parallel to the inner, substantially vertically directed or upright surface 22 of the confining lateral wall 5 of the base member 1 which bounds the aperture 4. The lateral or horizontal spacing or clearance between the face 21 and confronting surface 22 is such as to enable the cap member to move vertically clear of the wall 5 and, to limited degree, horizontally relative to the base member, as well as to permit the cap member to be inserted from below into the central aperture 4.

The llateral or horizontal contour of the cap member I by the contiguous lateral edges of the top, bottom and

end walls

15, 19 and 23, respectively, has arim about a side-opening pocket 25, the pockets at either side being rubber cushion 3; is subjected under vertical load, although some shear stresses are set up in it under forces tending to move the cap and.

base members laterally relativeto each other. Consequently, while having approximately the lateral contour of the aperture 4, the rubber pad 3 is of considerably less cross-section and also may have a slot 27 inv its upper face to receive avv locating protuberance or stud 28 depending from'the bottom wall 19 of the cap member for locating the'rubber pad laterally relative to the capdr'nembe'r. The base vmember 1 being open at the bottom, the rubber pad is designed to `rest directly on and be supported by either the surface (notshown) of the side frame or bolster on which the base member is mountedor, as in the illustrated embodiment, on one or more shirns'29 inserted between that surface and the base member to raise the height of the side bearing.

With its downward movement relative to the base member 1 resisted only by the rubber cushion 3 and of, such a height relative to the base member and rubber cushion as to telescope within the base member under excessive. shocks so that the latter are taken by the base member through its upper edge 16, the cap member 2 must have suiicient vertical travel in either direction relative to the base'member to maintain contact under operating conditions with the bearing memberr depending from the car body and at the same time must be limited in its upward relative movement to maintain or hold the parts of the side bearing in assembled relation` once it is mounted von a railway truck.

The first of the above requirements is met by imposing no restriction in the connection or interlock between the base and capV members onthe relative vertical movement of the cap member Within therequired limits of travel and using a rubber cushion' which will hold or maintain the top wall V15 of the cap member at the proper height above the upper edge 16 of the base member (usually about one-quarter of an inch) when the rubber is compressed under the static load of the carbody and which, While yielding and thus serving as'a cushion, will prevent telescoping of the cap member within the base member under all but excessive service shocks. The secondrequirement, aswell as the connection between base and cap member needed forthe first, is met by the provision on the cap member of a plurality of stop lugs or flanges 30 integral with and outstanding or outwardly directed laterally from opposite edges of its bottomwall 1S and aligned or centered relative to and projecting or extending. into one of the cavities 12 interrupting the lateral Wall of the base member, the lugs 3b in correspondence With the location'of the cavities 12 in the illustrated embodiment, here projecting from the sides 24E- of the base cap member. Engageable with the overlying portions of the reinforcing tianges 14 boundingthe upper endsof the cavities 12 which serve as cooperating abutments orV shoulders, the stop lugs 30-normally'are spaced or positioned therebelow by the static load of the car body imposed on the side bearing, the vertical spacing being suicient to accommodate the required relative upward movement.

Ordinarily, thesidebearing of the disclosed embodiment will be mounted on a'railway truck with its long axis disposed longitudinallyof the car body. So mounted, the spacing between the ends and-sides of the confronting-face 21 Vand surface 22 onits cap member and base member, respectively, permit limited movement of the car body longitudinally and laterallyrelative to thek truck against the yieldableresistance of. the rubber.

n 18 of the( cap member.; A smgle rubber pad orblock in-its preferred form, the4 to straight compression` cushion 3 before the cap member engages the lateral wall 5 of the base member. Thereafter, further relative movement of the car body is'frictionally resisted by the engagement between its bearing member and the upper wall 15 of the cap member.

It will be noted that the confronting face 21 and surface 22 on the base and cap member, respectively, instead of being exactly vertical, preferably have a slight inward taper or inclination toward the bottom of the side bearing. This aids in centering the cap member relative to the cavity 4 on initial assembly of the side bearing and, coupled With the resistance of the rubber pad to horizontal relative movement between the cap and base` members, minimizesthe noisein service from frictional engagement between the face 21 and surface 22. Such noise may further be minimized by imposing plates 31 of brake lining or like wear-resistant material between Vthe end walls 7 and 23 of the base and cap members, the plates in the illustrated embodiment being bonded to the ends of thevcap member and carrying the end portions of the latters vertically directed face 21.

Thesimplicity of the resilient side bearings of the present invention readily lends them to assembly duringV installation. However, it will usually be preferred to assemble the side bearings at the place of manufacture, in which case, after the cap member 2 and rubber pad 3 of each side bearing have been inserted in turn into the central aperture 4 through the open bottom of the base member 1, bands or clips may be employed for holding the parts in assembled relation prior to mounting. Once a side bearing is installed, the friction surface 17 of the top plate'lS of the cap member will constantly contact the bearing member on the body bolster as the latter moves relative to the truck bolster or side frame by the yieldable upward force of the rubber pad on the cap member. On both initial installation and subsequent inspection, the engageability of the upper edge 16 of the lateral wall S of the base member with the bearing member on the body bolster, under blows suliicient to cause thecap member to telescope within the base member, makes gauging of closure travel simply a matter of measuring the vertical distance between the upper edge 16 and the bearing member.

From the above detailed description, it will be apparent that `there has been provided an improved resilient side bearing which is of simple and rugged construction and which, throughthe inherent energy absorption characteristic. of the rubber in the rubber pad, is self-dampening, thus eliminating the necessity of snubbing means separate from the yieldable meansto dampen out any periodic oscillations. It should be understood that the described and disclosed embodiment is merely exemplary of the invention and that all modifications are intended to be included which do not depart from either the spirit or" the invention or the scope of. the appended claims.

Y Having described Vthe invention, I claim:

1. A resilient side bearing installable between a truck and body of a railway vehicle, comprising a base member mountable onsaid truck, said base member having an upstandingwallengageable at its upper end with means fixed to said car body and containing a vertically directed central aperture. extending through said base member, a cap member received frombelow in said aperture and movable vertically relative to and telescopable within said base member,Y rubber. means within said Vaperture below and normally urging au upper faceof said Vcap rnemberabove the` level of said upstanding wall Vfor engagementwith said fixed means, and means integral with and'projecting horizontally from one of said members and extending into recess means in saidother member for limiting upward relative movement therebetween..

2, A resilient side bearing installable between a truck and body of a railway vehicle, comprising a base mem-V ber mountable on said truck, said base. member having anupstanding Wall engageable at its upper end with` means fixed to said car body and containing a vertically directed central aperture extending through said base member, a cap member non-rotatably received from below in said aperture and movable vertically relative to said base member, rubber means within said aperture below and normally urging an upper face of said cap member above the level of said upstanding wall for engagement with said xed means, and stop lugs integral with and outstanding from opposite sides of said cap member and each extending into a downwardly opening cavity in said base member for limiting relative upward movement therebetween.

3. A resilient side bearing installable between a truck and body of a railway vehicle, comprising a base member mountable on said truck, said base member having an upstanding wall engageable at its upper end with means xed to said car body and containing a vertically directed central aperture extending through said base member, a cap member non-rotatably received from below in said aperture and movable vertically relative to and telescopably within said base member, a rubber pad within said aperture below and normally urging an upper face of said cap member above the level of said upstanding wall for engagement with said fixed means, and means integral with and projecting horizontally from one of said members and extending into recess means in said other member for limiting upward relative movement therebetween. l

4. A resilient side bearing installable between a truck and body of a railway vehicle, comprising a base member mountable on said truck, said base member having an upstanding wall engageable at its upper end with means fixed to said car body and containing a vertically directed central aperture extending through said base member, a cap member received from below in and contained laterally by said aperture and having a substantially vertically directed face confronting and spaced inwardly of and substantially parallel to a substantially vertical surface of said upstanding wall bounding said aperture, rubber means within said aperture below and normally urging an upper face of said cap member above the level of said upstanding wall for engagement with said xed means, and stop lugs integral with and outstanding from opposite sides of said cap member and each extending into a downwardly opening cavity in said base member for limiting relative upward movement therebetween.

5. A resilient side bearing installable between a truck and body of a railway vehicle, comprising a base member mountable on said truck, said base member having an upstanding wall engageable at its upper end with means xed to said car body and containing a vertically directed horizontally rectangular central aperture extending through said base member, a cap member received from below in and corresponding in horizontal section to said aperture and having a face inclined inwardly toward the lower end thereof and spaced from and kdisposed substantially parallel to a correspondingly inclined confronting surface of said upstanding wall bounding said aperture, a rubber pad within said aperture below and normally urging an upper face of said cap member above the level of said upstanding wall for engagement with said xed means, and means integral with and projecting horizontally from one of said members and extending into recess means in said other member for limiting upward relative movement therebetween.

6. A resilient side bearing installable between a truck and body of a railway vehicle, comprising a base member having an upstanding continuous lateral wall bounding a vertically directed aperture extending through said base member, feet integral with and outstanding at opposite sides from lower portions of said wall for mounting said base member on said truck, said upstanding wall having downwardly opening cavities at opposite sides thereof and extending therethrough, a cap member received from below in said central aperture and movable vertically relative to and telescopable within said base member, said cap member having a substantially vertically directed lateral face confronting and disposed inwardly of and substantially parallel to a substantially vertically directed surface of said upstanding wall bounding said aperture, a rubber pad in said aperture below and normally urging an upper face of said cap member above the level of said upstanding wall, and stop lugs integral with and outstanding from opposite sides of said cap member and each projecting into and normally spaced below an overlying edge of one of said cavities for limiting upward movementr of said cap member relative to said base member.

7. A resilient side bearing installable between a truck and body of a railway vehicle, comprising a base member mountable on said truck, said base member having an upstanding wall bounding a vertically directed central aperture extending through said base member, a cap member received from below in said aperture and movable vertically relative to and telescopable within said base member, rubber means within said aperture below and normally urging an upper face of said cap member above the level of said upstanding wall, and means carried by one of said members and engageable with the other member for limiting upward relative movement therebetween.

8. A resilient side bearing installable between a truck and body of a railway vehicle comprising a base member mountable on said truck, said base member having an upstanding wall engageable at its upper end with means xed to said car body, a central aperture substantially rectangular in cross-section extending through said base member, a cap member corresponding in cross-section to and received from below in said aperture and movable vertically relative to said base member, a rubber pad within said aperture below and normally urging 'an upper face of said cap member above the level of said upstanding wall for engagement with said fixed means, means carried by one of said members and engageable with the other member for limiting upward relative movement therebetween, and wear-resistant pads carried by one of said members and'interposed between ends of said cap member and confronting portions of said upstanding wall for minimizing noise therebetween.

References Cited in the file of this patent UNITED STATES PATENTS 577,237 Cliff Feb. 16, 1897 2,301,372 Cottrell NOV. l0, 1942 2,350,301 Cottrell May 30, 1944 2,547,852 Bryan Apr. 3, 1951 2,641,463 Mulcahy June 9, 1953