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US3254612A - Bolster snubbing mechanism for railway car truck - Google Patents

Bolster snubbing mechanism for railway car truck Download PDF

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Publication number
US3254612A
US3254612A US261404A US26140463A US3254612A US 3254612 A US3254612 A US 3254612A US 261404 A US261404 A US 261404A US 26140463 A US26140463 A US 26140463A US 3254612 A US3254612 A US 3254612A
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US
United States
Prior art keywords
chock
bolster
wedge
side frame
opening
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
US261404A
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English (en)
Inventor
James A Shafer
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.)
Midland Ross Corp
Original Assignee
Midland Ross Corp
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
Application filed by Midland Ross Corp filed Critical Midland Ross Corp
Priority to US261404A priority Critical patent/US3254612A/en
Priority to GB5328/64A priority patent/GB994011A/en
Priority to DE19641455162 priority patent/DE1455162A1/de
Priority to CH202664A priority patent/CH403832A/fr
Priority to NL6401559A priority patent/NL6401559A/xx
Priority to LU45493A priority patent/LU45493A1/xx
Priority to AT162564A priority patent/AT266208B/de
Priority to BE644285D priority patent/BE644285A/xx
Priority to SE2352/64A priority patent/SE321693B/xx
Application granted granted Critical
Publication of US3254612A publication Critical patent/US3254612A/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 railway car trucks which include a friction system for dampening the vertical oscillation of a car truck bolster relative to the side frame associated therewith.
  • the invention is concerned primarily with an arrangement :for facilitating the removal of friction wedges, wedge springs, and any other elements of the friction system.
  • a principal object of the present invention is to further improve bolster snubbing mechanisms of the type which employ an initially removable chock to support a wedge in contact with a bolster to obtain still further advantages in car truck assembly and disassembly operations.
  • An important object is to provide a bolster snubbing mechanism including a chock in which extremely small displacement of the wedge from its Working position is required in order to free the chock for removal from the truck.
  • Still another object is to obtain more compact arrangement of the bolster snubbing mechanism than heretofore attained with the use of the initially removable chock whereby the column portion of a side frame may retain more extensive cross webbing and other transverse support.
  • the invention resides in a car truck wherein the bolster is snubbed relative to one or both side frames thereof by a mechanism including a chock disposed between a support in the side frame and the friction wedge, the wedge positioned also against the bolster, and a spring disposed between the wedge and a seat therefor in the side frame.
  • the side frame has a lateral opening enabling instantaneous removal therethrough of the chock when disengaged from the wedge.
  • the car truck comprises a bolster; a side frame having: transversely spaced side walls, a bolster-opening flanked by two columns for receiving the bolster with its length in transverse relation to that of the side frame, a passageway contiguous with the bolster-opening and extending away therefrom between the walls, preferably to a window spaced longitudinally of the side frame from the bolster opening, and a support fixed between the walls within or "ice adjacent the passageway and defining a seat for the chock which is spaced from the bolster opening and faces theresurfaces against the nearest side wall of the bolster; a.
  • chock positioned within the passageway with its opposite ends facing transversely of the side frame; and a spring or other resilient means standing within the side frame against the wedge to urge the latter into wcdging relation with the bolster side and the chock.
  • the chock is supported with its end surfaces facing transversely of the side frame.
  • One of the side frame walls has an opening in approximate registry with the end of the chock adjacent thereto when the chock is positioned against its seat on the support.
  • the wall opening is of a size and shape permitting passage of the chock into and out of the side frame.
  • the side frame has another opening in its side wall opening into a region immediately adjacent the smaller end of the wedge formed by'its diverging side whereby the wedge may be loosened from its normal position to allow the chock to be traversed through th opening referred to above.
  • FIG. 1 is a fragmentary side elevation of a car truck incorporating one embodiment of the invention.
  • FIG. 2 is a fragmentary view in section taken along line IIII of FIG. 1 illustrating a chock in normal working position.
  • FIG. 3 is a fragmentary side elevation of the car truck of FIG. 1 illustrating the friction wedge retracted from its working position by a pry bar, and a chock positioned for passing outwardly through a lateral open ing of the side frame.
  • FIG. 3a is an enlarged fragmentary elevation showing FIG. 4 is a perspective view of the chock employedin the embodiment of FIGS. 1 to 6.
  • FIG. 5 is an elevation in section of the side frame taken along line V-V of FIG. 1 with only the side frame shown in full line. Shown in dot-dash line but not shown in FIG. 1, is a portion of a pry bar and the friction wedge and the spring therefor in a depressed position.
  • FIG. 6 is fragmentary transverse horizontal section taken along line VIVI of FIG. 1.
  • FIG. 7 is a fragmentary side elevation of a car truck comprising a modified side frame and chock.
  • FIG. 8 is a perspective view of the chock included in the car truck of FIG. 7.
  • a car truck according to this invention comprises a bolster 5 and a side frame 6 having a bolster opening 7 through which the bolster extends with its length in transverse relation with the length of the side frame.
  • the bolster is vertically supported from a spring seat 10 by a plurality of springs 11.
  • An upstanding lateral lip 12 of the spring seat defines the lower extremity of. the bolster opening.
  • the bolster (see FIG. 6) is locked from movement in its longitudinal direction relative to the side frame by a friction wedge 15 which extends into a lateral recess 16 in the side wall 11 of the bolster as defined by the surface of a Wear plate 18 lining the recess.
  • the wedge 15 extends in. the hflri zgntal, longitudinal direction of the side frame into an opening or passageway 20 contiguous with the bolster opening.
  • the opening 20 extends internally and longitudinally of the frame Patented June 7, 1966 to a window 21 in the side frame in longitudinally spaced relation with the bolster opening.
  • the opening 20 is intended to include generally that open region bounded by side walls 23 and 24 of the side frame, along the bottom by a web 25, and in its upper portion by a chock support 32.
  • the web 25 has an upper surface and an integral boss 26 which define a spring seat 26a for a spring 27.
  • the opening 20 comprises generally the region within which the various elements of the bolster snubbing mechanism, including a chock 28, are received.
  • Stanchions 22a and 22b of the column 22 are continuations of the walls 23 and 24 and partly define the opening 20
  • the stanchions are spaced at close clearance with side walls of the wedge 15. This clearance, along with close clear ance of the wedge with end surfaces of the bolster recess as shown in FIG. 6, limit the relative movement of the bolster transversely of the wedge to that needed for normal warping freedom within the car truck and for cushioning shocks resulting from movements of the bolster transversely relative to the side frames.
  • the opening 20 has an important function as a passageway to the window 21 for removal of the wedge spring 27 and the wedge 15 in the event either one of these parts must be replaced. It is thus essential that transverse portions of the side frame, such as the upper extremity of the web 25 at 31, and the lower extremity of a chock support 32 at 33 must be spaced sufficiently for passage of the wedge and the spring to the window 21.
  • the chock support 32 is located adjacent the opening 20 and serves as a partial boundary thereof.
  • the support has a chock seat comprising areas 35 and 36 which meet at 37 in a dihedral angle extending transversely of the side frame 6.
  • the chock 28 has a rear side comprising areas 38 and 39 which also meet in a dihedral angle of approximately the same magnitude as that of the chock seat.
  • the chock seat and the rear side of the chock are thus arranged in a reentrant and projecting relationship along a vertical longitudinal plane of the side frame parallel to the walls 23 and 24 which prevents any shifting of the chock, when engaged by the Wedge, in any direction along this plane.
  • a principal feature of this invention is that the chock 28 may be removed from the side frame in the transverse direction thereof through an opening 40 provided essentially for this purpose in the side wall 24.
  • the opening, 40 conforms as a minimum generally to the maximum cross section of the chock in a vertical longitudinal plane of the side frame and is of necessity at least slightly larger than this cross section in order to permit facile passage of the chock to and from its position on the chock seat 35, 36.
  • the opening 40 When the chock is provided with a longitudinal lug 44 on a lateral surface 45 extending between the rear side area 39 and the front side 46 of the chock, the opening 40 includes a notch 48 for passage of the lug 44 therethrough as shown in FIG. 3.
  • FIG. 3 shows the chock 28 separated from its seat, 35, 36 in registry with the opening 40 and the notch 48 thereof for passage out of the side frame.
  • the wedge 15 is shown depressed with respect to its regular operating position shown in FIG.'1 so that the chock may be separated from the. seat sufiiciently in the longitudinal direction of the side frame to be shifted through the opening 40.
  • the friction wedge 15 is shown depressed in FIG. 3 from its normal working position of FIG. 1 in the wedge-receiving region located between the chock 28 and the bolster 5.
  • the position of the wedge is shown lower than that necessary to disengage the chock 28 from the chock seat 35, 36.
  • the chock 28 include a pair of lugs 53, 54 of which each protrudes from an end surface of the chock. As shown in FIG. 2, the lug 53 spaces the body of the chock from the wall 23 to maintain the corners of the chock away from any fillets which join the check seat 35, 36 to the side wall 23. Although but one of the lugs 53, 54 are used at any one time, both lugs are provided in order that the chock may be used in the corresponding chock-receiving region on the opposite side of the bolster opening within a side frame having duplicate snubbing mechanisms on opposite sides of the bolster. This avoids the necessity for constructing thechocks as rights and lefts.
  • a further feature of the chock is that it is hollow and its hollow region 56 opens into each end surface by apertures 57 and 58.
  • the apertures are of smaller diameter than the main portion of the region 56 to provide a finger grip needed in removing the chock from the side frame.
  • the hollow region 56 also lightens the chock and makes the casting of such chocks less subject to defects.
  • the wedge 15 is constructed with a web 61 having an upper surface which provides a surface or seat 62 for receiving the end surface of a pry bar, and an undersurface 63 functioning as a spring seat in opposed relation with the side frame spring seat 26a on the web 25.
  • An opening for the pry bar 51 through the side wall 24 is provided by a boss 65 defining a pry bar receiving aperture 66 in its outer lateral extremity.
  • the boss 65 is constructed integrally with a flange 68 having a width as shown in FIG. 5.
  • the boss 65 terminates outwardly from the side frame in the same vertical longitudinal plane of the side frame as the flange 68. This places a fulcrum surface 69 for the pry bar outwardly from the general plane of the side wall 24 at a distance from the point of application of the bar to the wedge 15,
  • the side frame is further provided with apertures 70, 71 in the side walls 23 and 24, respectively, which extend on a transverse horizontal axis in fixed relation with the side frame which intersects the wedge spring 27 at its normal working position.
  • the purpose of the apertures 70, 71 is to receive a pin of sufficient length to extend through the side frame to hold the spring in a free length condition and the wedge 15 supported thereon backwardly out of the bolster opening on such occasions as withdrawal or insertion of the bolster relative to the side frame.
  • the spring 27 and the wedge 15 may be inserted into the side frame opening 20 either through the bolster opening or through the window 21.
  • the spring is placed on the seat 26a of the web 25 with the wedge seated on the top end of the spring.
  • a pin is then inserted through the sideframe apertures 70 and 71 in front of the spring to hold the Wedge out of the bolster opening.
  • the bolster is then inserted into the side frame and seated on springs 11 to attain a vertical and horizontal position relative to the side frame as shown in FIG. 6. Thereafter the pin is withdrawn from the apertures 70, 71 to allow the wedge 15 to settle into the lateral recess of the bolster against the wear plate 18.
  • the next and final element to be put into place is the chock 28. This is accomplished by inserting the pry bar 51 through the boss aperture 66 into contact with the seat 62 therefor at the small end of the wedge and prying upwardly on the pry bar to depress the wedge to an approximate position as shown in FIG. 3.
  • chock 28 may then be inserted into position in front of the chock seats 35, 36 along the path indicated by FIG. 3. Pressure on the friction Wedge by the pry bar is then released to allow the wedge to move upwardly into wedging relation with the wear plate 16 in the bolster recess and the front chock surface.
  • the operations just described are followed in reverse order.
  • the chock is first removed through its opening 40 in the side wall 24.
  • depressing the wedge 15 by the pry bar may not be necessary.
  • FIGS. 7 and 8 illustrate a car truck and chock, respectively, of modified design.
  • the car truck of FIG. 7 is identical with that of FIG. 1 except for the reentrant and projecting relationship of the chock 28A and the chock support 32A of the side frame 6A.
  • the letter A is added to the corresponding numeral from FIGS. 1 to 6.
  • the chock may be constructed with its rear side comprising areas 38A, 39A, arranged in a reentrant dihedral angle of which the apex extends in a transverse direction of the side frame.
  • the areas 35A, 36A of the chock seat on the other hand, project in a dihedral angle complementary to that of the chock.
  • a railway car truck comprising:
  • FIGS. 7 and 8 illustrate" in projecting and re-entrant relationship along a vertical plane parallel to said side walls to prevent shifting of the chock along said seat and, on the opposite from side, engaging the other divergent surface of the wedge;
  • said wall of the side frame defines an open region adjacent said pry bar receiving seat
  • one of said side frame walls has an aperture therethrough contiguous with said region defining a fulcrum point fora pry bar extending therethrough into contact with said pry bar receiving seat.
  • the car truck of claim 1 comprising:
  • detent means for preventing movement of the chock through said side wall opening comprising means on said side frame overlapping means on said chock in the longitudinal direction of the side frame when said chock is seated on said chock seat;
  • a railway car truck comprising:
  • both the rear side of said chock and said chock seat are in projecting and reentrant relationship, respectively, and both comprise areas of which the planes meet in approximately equal dihedral angles extending transversely of the side frame.
  • the rear side of the chock and said chock seat are in reentrant and projecting relationship, respectively, and both comprise areas the planes of which meet in approximately equal dihedral angles; said dihedral angles extending transversely of the side frame.
  • the support is spaced from the bolster opening a distance equal to substantially the maximum dimension of the wedge in said direction to afford substantial vertical passage of the wedge between the bolster and the support with the chock removed.
  • the chock has spacer means projecting from the end of the chock facing the other of said side walls and into abutting relation with said other side wall.
  • the chock has a lug on a lateral surface extending between said front and rear sides;
  • said other opening is extended in the longitudinal direction of the side frame away from said seat to enable passage of the chock through said other opening along a path in spaced relationship with the chock seat;
  • said other opening has a notch receiving said lug when the chock occupies said path, and said lug moves out of registry with said notch upon engagement of the chock with the chock seat.
  • said chock has spacer means projecting from each end for engaging the other of said side walls;
  • said side frame comprises a floor for said bolster opening
  • an upstanding lip defines the lower extremity of the bolster opening
  • a tension member extends along underneath the said floor wall and inclines upwardly toward the ends of the side frame
  • said boss has an opening in its laterally outward extremity for receiviny a pry bar.
  • each side wall has an aperture in horizontal transverse registry with the corresponding aperture of the other for receiving a pin in both apertures and in engagement with the side of the spring facing toward said bolster opening;
  • said pin-receiving apertures are located relative to the bolster opening to support a pin extending therethrough disposing said wedge supported on said spring in free-length condition substantially against said support with the chock removed.
  • a side frame for a car truck of the type having 40 a friction bolster snubbing mechanism wherein the side frame supports a friction wedge against the bolster by means of a spring and a removable chock supported by the side frame against the wedge, the side frame having:
  • said side wall having said other opening has overlapping relation with the chock in position on said seat to prevent passage of the chock through said other opening.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)
  • Seats For Vehicles (AREA)
US261404A 1963-02-27 1963-02-27 Bolster snubbing mechanism for railway car truck Expired - Lifetime US3254612A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US261404A US3254612A (en) 1963-02-27 1963-02-27 Bolster snubbing mechanism for railway car truck
GB5328/64A GB994011A (en) 1963-02-27 1964-02-07 Improvements in railway vehicle bogies
DE19641455162 DE1455162A1 (de) 1963-02-27 1964-02-18 Unterlagen-Feststellvorrichtung fuer Eisenbahnwagen-Fahrgestelle
NL6401559A NL6401559A (de) 1963-02-27 1964-02-20
CH202664A CH403832A (fr) 1963-02-27 1964-02-20 Boggie pour wagon de chemin de fer
LU45493A LU45493A1 (de) 1963-02-27 1964-02-22
AT162564A AT266208B (de) 1963-02-27 1964-02-25 Drehgestell für Schienenfahrzeuge
BE644285D BE644285A (de) 1963-02-27 1964-02-25
SE2352/64A SE321693B (de) 1963-02-27 1964-02-26

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US261404A US3254612A (en) 1963-02-27 1963-02-27 Bolster snubbing mechanism for railway car truck

Publications (1)

Publication Number Publication Date
US3254612A true US3254612A (en) 1966-06-07

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ID=22993161

Family Applications (1)

Application Number Title Priority Date Filing Date
US261404A Expired - Lifetime US3254612A (en) 1963-02-27 1963-02-27 Bolster snubbing mechanism for railway car truck

Country Status (9)

Country Link
US (1) US3254612A (de)
AT (1) AT266208B (de)
BE (1) BE644285A (de)
CH (1) CH403832A (de)
DE (1) DE1455162A1 (de)
GB (1) GB994011A (de)
LU (1) LU45493A1 (de)
NL (1) NL6401559A (de)
SE (1) SE321693B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3404641A (en) * 1966-07-25 1968-10-08 Amsted Ind Inc Railway truck side frame having a fulcrum in a window
US3577931A (en) * 1966-12-09 1971-05-11 Midland Ross Corp Dampened railway car truck
US3855942A (en) * 1973-09-28 1974-12-24 Amsted Ind Inc Snubbed railway truck bolster

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US966375A (en) * 1910-03-04 1910-08-02 William H Mateer Bolster-guide for truck-frames.
US966376A (en) * 1910-03-04 1910-08-02 William H Mateer Bolster-guide for truck-frames.
US2159138A (en) * 1936-07-30 1939-05-23 Otho C Duryea Car truck
US2315047A (en) * 1941-01-15 1943-03-30 American Steel Foundries Truck
US2324267A (en) * 1940-12-20 1943-07-13 American Steel Foundries Truck
US2332693A (en) * 1941-11-10 1943-10-26 Revere Camera Co Magazine ejector for cameras
US2545591A (en) * 1947-01-25 1951-03-20 Standard Car Truck Co Railway car truck
US2729174A (en) * 1950-06-07 1956-01-03 Symington Gould Corp Snubbed railway truck
US2731923A (en) * 1956-01-24 Railway truck
US2896550A (en) * 1956-02-08 1959-07-28 Holland Co Bolster damping arrangement for railway car trucks
US2934333A (en) * 1955-02-10 1960-04-26 Holland Co Means for stabilizing railway trucks
US2976822A (en) * 1958-07-01 1961-03-28 Holland Co Apparatus and method for modifying fabricated bolsters to provide ride stabilization
US3079873A (en) * 1960-02-29 1963-03-05 Amsted Ind Inc Universal side frame for snubbed railway car trucks

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2731923A (en) * 1956-01-24 Railway truck
US966376A (en) * 1910-03-04 1910-08-02 William H Mateer Bolster-guide for truck-frames.
US966375A (en) * 1910-03-04 1910-08-02 William H Mateer Bolster-guide for truck-frames.
US2159138A (en) * 1936-07-30 1939-05-23 Otho C Duryea Car truck
US2324267A (en) * 1940-12-20 1943-07-13 American Steel Foundries Truck
US2315047A (en) * 1941-01-15 1943-03-30 American Steel Foundries Truck
US2332693A (en) * 1941-11-10 1943-10-26 Revere Camera Co Magazine ejector for cameras
US2545591A (en) * 1947-01-25 1951-03-20 Standard Car Truck Co Railway car truck
US2729174A (en) * 1950-06-07 1956-01-03 Symington Gould Corp Snubbed railway truck
US2934333A (en) * 1955-02-10 1960-04-26 Holland Co Means for stabilizing railway trucks
US2896550A (en) * 1956-02-08 1959-07-28 Holland Co Bolster damping arrangement for railway car trucks
US2976822A (en) * 1958-07-01 1961-03-28 Holland Co Apparatus and method for modifying fabricated bolsters to provide ride stabilization
US3079873A (en) * 1960-02-29 1963-03-05 Amsted Ind Inc Universal side frame for snubbed railway car trucks

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3404641A (en) * 1966-07-25 1968-10-08 Amsted Ind Inc Railway truck side frame having a fulcrum in a window
US3577931A (en) * 1966-12-09 1971-05-11 Midland Ross Corp Dampened railway car truck
US3855942A (en) * 1973-09-28 1974-12-24 Amsted Ind Inc Snubbed railway truck bolster

Also Published As

Publication number Publication date
DE1455162A1 (de) 1969-04-30
SE321693B (de) 1970-03-16
LU45493A1 (de) 1964-04-22
AT266208B (de) 1968-11-11
CH403832A (fr) 1965-12-15
GB994011A (en) 1965-06-02
BE644285A (de) 1964-08-25
NL6401559A (de) 1964-08-28

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