US2575137A - Damping means for railway trucks - Google Patents

Damping means for railway trucks Download PDF

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Publication number
US2575137A
US2575137A US622434A US62243445A US2575137A US 2575137 A US2575137 A US 2575137A US 622434 A US622434 A US 622434A US 62243445 A US62243445 A US 62243445A US 2575137 A US2575137 A US 2575137A
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US
United States
Prior art keywords
bolster
shoe
spring
wedge
side frame
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US622434A
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English (en)
Inventor
James C Settles
Claude L Orr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Buckeye Steel Castings Co
Original Assignee
Buckeye Steel Castings Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to BE477097D priority Critical patent/BE477097A/xx
Application filed by Buckeye Steel Castings Co filed Critical Buckeye Steel Castings Co
Priority to US622434A priority patent/US2575137A/en
Priority to GB3505/48A priority patent/GB645718A/en
Application granted granted Critical
Publication of US2575137A publication Critical patent/US2575137A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
    • B61F5/00—Constructional details of bogies; Connections between bogies and vehicle underframes; Arrangements or devices for adjusting or allowing self-adjustment of wheel axles or bogies when rounding curves
    • B61F5/02—Arrangements permitting limited transverse relative movements between vehicle underframe or bolster and bogie; Connections between underframes and bogies
    • B61F5/04—Bolster supports or mountings
    • B61F5/12—Bolster supports or mountings incorporating dampers
    • B61F5/122—Bolster supports or mountings incorporating dampers with friction surfaces

Definitions

  • This invention relates to improvements in railway trucks, and more particularly to means for holding the friction wedges or shoes of damping means in the wedge pockets of a bolster (in opposition to the pressure of the wedge springs) while the bolster is being applied to, or removed from, the side frame.
  • the primary object of the invention is to improve the damping means retaining structure disclosed in our application, Serial No. 592,678, dated May 8, 1945.
  • the improvement consists in providing for the use of two retaining pins to hold each friction wedge or shoe in a pocket of the bolster, against the pressure of the wedge spring, while the bolster is being introduced into, or removed from, the side frame.
  • a single retaining pin is used near the bottom of the friction wedge. It is important that the overall width across the two friction wedges be less, with the retaining pins applied, than the width between the side frame columns, in order to permit easy application or removal of the bolster end, in the side frame bolster opening.
  • Our improved construction in which two retaining pins are used with each shoe or wedge satisfactorily retains the wedges within the desired limits with allowance for the usual manufacturing tolerances because there will be no tendency of either wedge to pivot about a, single retaining pin.
  • Fig. 1 is a side elevation, partly in longitudinal vertical section, of the medial portion of the side frame of a railway car truck with our improvements incorporated in such truck.
  • Fig. 2 is a transverse horizontal sectional view taken on the line 2-2 of Fig. 1.
  • Fig. 3 is a transverse vertical sectional view taken on the line 33 of Fig. 1.
  • Fig. 4 is a transverse vertical sectional view of an end portion of the bolster, forming part of the- Referring to the drawings, 6 designates a trusstype side frame of a. railway truck provided with 10 Claims. (Cl. 105-197) spaced bolster guide columns 1 arranged at opposite sides of a bolster opening 8.
  • the spring seat 9 of each side fram supports truck springs I0 positioned within the bolster opening.
  • a bolster end or arm I I extends into the bolster opening, rests on the springs and is guided by the columns 1.
  • a pocket I2 is formed for the reception of a friction wedge 0r shoe I3 and each of'the wedges has its reduced end at the top thereof.
  • Each wedge also has a vertical face I4 to frictionally engage a vertical wear plate I5, fixed to the guide column.
  • the wedge also has an inclined upper face I6 slidably engaging a, complementary inclined face I 1 formed by the bolster and arranged in the pocket. As may be seen from Fig.
  • each of the surfaces I6 is slightly convex, as indicated at I8 in Fig. 6, to allow the friction wedge-to rock relatively to the bolster and to permit the bolster to rock relatively to the side frame.
  • Holes 22 and 23 are provided in the friction wedges and bolster, respectively, on the axes of the wedge springs 20 for insertion of bolts (not shown) by means of which the springs 20 are compressed so that upper and lower retaining pins can be inserted in the then aligned upper and lower friction wedge and bolster holes 24 and 25, and 26 and 21, respectively.
  • the bolts, which were passed through holes 22 and 23, are removed and the bolster is then applied to the side frame, by introducing the bolster end into the lower portion of the bolster opening and then raising the bolster to bring the vertical surfaces Id of the friction shoes into confronting relation with the wear plates I5 of the columns I.
  • the retaining pins are removed from the holes 24, 25, 26 and 21, so that the force of the springs 20 is exerted against the side frame columns, in order to produce the desired damping action.
  • Fig.1 1- shows .the position of the :fricticnwedgeswith the-'rbolster applied to the side-frame and theretaining pins removed. Itshould be evident,-r.however,:from the; above description that compression; of -wedge springs" 20, as described; :will align;.the'ho1esii2.4, 25 and 26;21 to: permit .applicatiorrbf the retaining-pins.
  • each wedge: shoe has a singlezupstandingrlug 3 h arranged between a'pair ofupwardly projecting lugs 31w on'ithe bolster, and in accordance with the 'inventiomthe holes 24 are in' the lugs of. the: wedgesshoeswandi the holes 25in the lugsof the bolster. As best'shown in Fig.
  • the top member 29 of the-side frame is of inverted channel section andof-siiffi'cient width to permit the lugs 3i and 3Ia to -pass be tween the vertical flanges 32zand 3.3:of the channel when the bolster is raised :to' -the topof' the bolsteropening, in-order to apply orremove the bolster supporting springs 10.
  • a side frame member provided with bolster guide columns arranged at opposite sides of a bolster opening, a bolster portion extending into said opening and having diverging surfaces, spring means supporting said bolster portion from the side 'frame, friction wedges arranged at opposite sides of the bolster portion and frictionally engaging said columns and said diverging surfaces, spring means posi- .tionedin.
  • the bolster portion substantially parallel to 's'aid'diver'g'ing surfaces and yieldingly urg- '1ingsthewedgesragainst said columns, said side frame memberl having a top portion of inverted :chanIi'eI shapeI lugS arranged at the top of the bolster -portion 'and provided with horizontal apertures, and lugs projecting from the tops'of the wedges into said channel and provided with horizontal apertures adapted to be brought into alignment with .theaperturesbfvthe bolster portion to permit retaining pins to be inserted into the holes for holding the last-mentioned spring means in-compressed condition.
  • said side frame member having a top portion of inverted channel shape, lugs arranged at the top or the bolster portion and provided with horizontal apertures, said lugs being movable into said channel, and lugs projecting from the tops of the wedges into said channel and provided with horizontal apertures adapted to be brought into alignment'with .
  • the apertures ofthe bolster portion to-permit'retaining pins to be inserted into the apertures for holding the last-mentioned spring means in compressed condition.
  • a friction shoe for'damping a railway truck comprising a unitary member having a vertical guide-surface at one side, thereof and a.sloping surface at the opposite side thereof, saidmember having a top providedwith. an aperture, the walls of which. are substantially parallel with said sloping surfacathe underside of said top having aspring contact :surface arranged substantially perpendicular to the walls of the aperture, the top of the member having a recess communicatingwith 'the apertureand a lug projectingupwardly from the top of the member and pro-' vided-witha horizontal rod receiving aperture.
  • a bolster member said bolster member having a pocket therein open at one side of the bolster, a shoe in said pocket, cooperating inclined surfaces on the shoe and the bolster member, a spring between the bolster member and the shoe applying force to the shoe in alignment with said inclined surfaces and moving the inclined surface on the shoe into engagement with the inclined surface on the bolster member to urge the shoe out of said pocket, said bolster member and said shoe having pin receiving apertures arranged at one side of the pring, and said shoe and said bolster having pin receiving apertures therein arranged at th other side of said spring.
  • a bolster member In a railway car truck, a bolster member, said bolster member having a pocket therein open at one side of the bolster member, a shoe in said pocket, cooperating inclined surface on the shoe and on the bolster member, a helical spring open along the axis thereof compressed between the bolster member and the shoe arranged generally parallel with respect to said inclined surfaces for urging the inclined surfaces into contact and thereby urging the shoe out of said pocket, said shoe and said bolster member each havin a hole therein both aligned with the axis of the helical spring, said shoe and bolster member having pin receiving apertures therein at one side of said spring, and said shoe and said bolster having pin receiving apertures therein at the other side of the spring.
  • a friction shoe for the damping mechanism of a railway car truck comprising, a rigid member having a relatively fiat front face, a sloping surface at the opposite side of said member, a top wall for the shoe arranged substantially at right angles to said sloping surface, said top wall having an aperture therethrough with the axis of the aperture substantially parallel to said sloping surface, a spring seat under said top Wall around said aperture substantially at right angles to said sloping surface, and a lug carried by the top of said shoe having an aperture therethrough.
  • a friction shoe for snubbing movement of a member of a railway car truck comprising, a member having a relatively flat face at one side thereof, a sloping surface at the opposite side of said member, a top wall for the shoe arranged substantially at right angles to said sloping surface, said top wall having an aperture therethrough with the axis of the aperture substantially parallel to said sloping surface, a lug carried by the top of said shoe having an aperture therethrough, and the front edge of said lug being substantially parallel to said flat face.
  • a bolster member fora railway car truck said bolster member having a pocket therein open towards one side thereof, an inclined surface on the bolster member within the pocket, a spring seat within said pocket at right angles to said inclined surface, said bolster member having a hole therethrough with the axis thereof at right angles to the spring seat, spaced lugs carried by and extending upwardly from the top of the bolster member, and said lugs having aligned holes transversely therethrough.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Springs (AREA)
  • Vibration Dampers (AREA)
US622434A 1945-10-15 1945-10-15 Damping means for railway trucks Expired - Lifetime US2575137A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE477097D BE477097A (es) 1945-10-15
US622434A US2575137A (en) 1945-10-15 1945-10-15 Damping means for railway trucks
GB3505/48A GB645718A (en) 1945-10-15 1948-02-06 Damping means for railway trucks

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US622434A US2575137A (en) 1945-10-15 1945-10-15 Damping means for railway trucks

Publications (1)

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US2575137A true US2575137A (en) 1951-11-13

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US (1) US2575137A (es)
BE (1) BE477097A (es)
GB (1) GB645718A (es)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2697989A (en) * 1947-06-21 1954-12-28 Nat Malleable & Steel Castings Car truck
US2768589A (en) * 1953-03-16 1956-10-30 Nat Malleable & Steel Castings Snubbed railway truck
US11225271B2 (en) * 2019-08-26 2022-01-18 Amsted Rail Company, Inc. Damping system for a railway truck assembly

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2118006A (en) * 1935-01-14 1938-05-17 Symington Gould Corp Railway truck
US2169715A (en) * 1937-09-23 1939-08-15 Standard Car Truck Co Stabilized truck and bolster therefor
US2378415A (en) * 1943-04-05 1945-06-19 American Steel Foundries Car truck
US2378414A (en) * 1942-03-30 1945-06-19 American Steel Foundries Car truck
US2407950A (en) * 1945-01-06 1946-09-17 American Steel Foundries Truck

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2118006A (en) * 1935-01-14 1938-05-17 Symington Gould Corp Railway truck
US2169715A (en) * 1937-09-23 1939-08-15 Standard Car Truck Co Stabilized truck and bolster therefor
US2378414A (en) * 1942-03-30 1945-06-19 American Steel Foundries Car truck
US2378415A (en) * 1943-04-05 1945-06-19 American Steel Foundries Car truck
US2407950A (en) * 1945-01-06 1946-09-17 American Steel Foundries Truck

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2697989A (en) * 1947-06-21 1954-12-28 Nat Malleable & Steel Castings Car truck
US2768589A (en) * 1953-03-16 1956-10-30 Nat Malleable & Steel Castings Snubbed railway truck
US11225271B2 (en) * 2019-08-26 2022-01-18 Amsted Rail Company, Inc. Damping system for a railway truck assembly

Also Published As

Publication number Publication date
GB645718A (en) 1950-11-08
BE477097A (es)

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