US3708076A - Railway coupler yoke - Google Patents

Railway coupler yoke Download PDF

Info

Publication number
US3708076A
US3708076A US00168179A US3708076DA US3708076A US 3708076 A US3708076 A US 3708076A US 00168179 A US00168179 A US 00168179A US 3708076D A US3708076D A US 3708076DA US 3708076 A US3708076 A US 3708076A
Authority
US
United States
Prior art keywords
radial
fillet
draft gear
generated
tangent
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
US00168179A
Other languages
English (en)
Inventor
R Radwill
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.)
Amsted Industries Inc
Original Assignee
Amsted Industries Inc
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 Amsted Industries Inc filed Critical Amsted Industries Inc
Application granted granted Critical
Publication of US3708076A publication Critical patent/US3708076A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61G—COUPLINGS; DRAUGHT AND BUFFING APPLIANCES
    • B61G3/00—Couplings comprising mating parts of similar shape or form which can be coupled without the use of any additional element or elements
    • B61G3/04—Couplings comprising mating parts of similar shape or form which can be coupled without the use of any additional element or elements with coupling head having a guard arm on one side and a knuckle with angularly-disposed nose and tail portions pivoted to the other side thereof, the nose of the knuckle being the coupling part, and means to lock the knuckle in coupling position, e.g. "A.A.R." or "Janney" type

Definitions

  • ABSTRACT A new fillet for the intersection of the strap and the rear follower bearing of a yoke is provided having a compound radial surface and an undercut portion.
  • the curve is designed to reduce stress concentration and manufacturing difficulties in this area.
  • the undercut portion removes metal from the draft gear pocket and thereby eliminates notching of the strap.
  • Applicant has solved the above problems by providing a new fillet having an enlarged curved surface and an undercut portion.
  • the enlarged curve aids in the reduction of stress concentration while reducing manu facturing difficulties such as hot tears.
  • the undercut portion eliminates metal in the area of the straps and the rear follower bearing thereby opening up the draft gear pocket. This removal results in the elimination of yoke notching which can seriously reduce the strength and life of the yoke.
  • FIG. 1 illustrates a side elevational view of a railway coupler yoke.
  • FIG. 2 is an enlarged view of the portion of the yoke illustrated in FIG. 1 within circle A.
  • FIG. 3 is an enlarged view similar to FIG. 2.
  • FIG. 4 is an enlarged view similar to FIG. 2.
  • FIG. 1 illustrates an American Association of Rails (A.A.R.) alternate standard yoke for a type F interlocking coupler.
  • the yoke includes spaced upper and lower straps 12 and 14 interconnected at their rear end 16 by a rear follower bearing 18 having a forward surface 20.
  • the front end of the straps l2 and 14 are interconnected by spaced yoke head tie straps 22 (only one shown) to define a coupler shank opening 24.
  • the upper and lower surfaces 26 and 28 respectively of lower and upper straps l4 and 12 are perpendicular to forward surface and together therewith define a draft gear pocket 30.
  • the novelty of this disclosure lies in a given relief fillet located between lower surface 28 and forward surface 20 and upper surface 26 and forward surface 20.
  • the fillet area 32 defined by the circle A, has been enlarged and various relief fillets are illustrated in FIGS. 2 to 4. It should be appreciated that although only one given type of yoke is illustrated the disclosure hereinafter set out may be readily used on other yokes having a draft gear pocket 30 or the like.
  • FIG. 2 illustrates the standard A.A.R. fillet 32 located at the junction of bottom strap 14 and rear follower bearing 18.
  • the fillet is defined by a radial surface 34 that is tangent with upper surface 26.
  • Surface 34 is defined by the outer point of a /4 of an inch radius which extends rearwardly of forward surface 20 a maximum of A; of an inch.
  • An angular surface 36 of fillet 32 is tangent to surface 34 and meets forward surface 20 at a point 34 of an inch above upper surface 26. It may be readily seen that surface 34 extends into draft gear pocket 30 in the area of the intersection of the extensions of forward surface 20 and upper surface 26. These extensions of surfaces 20 and 26 are respectively indicated by dot-dash lines 38 and 40.
  • FIGS. 1 and 2 although an A.A.R. standard, has resulted in high stress concentration, manufacturing problems, e.g., hot tears, and surface notching from a draft gear moving in the draft gear pocket 30.
  • manufacturing problems e.g., hot tears
  • surface notching from a draft gear moving in the draft gear pocket 30.
  • at least one company began producing yokes having a fillet 32 similar to the one illustrated in FIG. 3.
  • the upper surface 26 of lower strap 14 is tangent to a radial surface 42 generated by the outer point of a one inch radius which is struck from a point /4 of an inch forward of forward wall 20.
  • Radial surface 42 is in turn tangent to a second radial surface 44 which is generated by the outer point of a k of an inch radius struck from a point lying on the extension 38 of forward surface 20 and terminating at forward wall 20, 1 and A inches above upper surface 26.
  • FIG. 4 illustrates a new fillet 46 which provides a solution to all three problems.
  • the increased radii substantially reduces the stress concentration over the A.A.R. standard in FIG. 2 and offer a reduction in stress concentration over the fillet illustrated in FIG. 3.
  • the size of fillet 46 further minimizes hot tears and other casting defects. Since the construction of fillet 46 is tapered and undercut with minimized strength decrease, draft gear notching has been eliminated.
  • FIG. 4 has a downwardly extending radial surface 48 which is tangent to upper surface 26 of strap 14.
  • Surface 48 is generated by the outerpoint of a 7/8 of an inch radius.
  • An upwardly extending radial surface 50 generated by the outer point of a 7/8 of an inch radius struck from a point ll: of an inch forward of forward surface 20 is tangent to surface 48 and extends below surface 26 a distance of 1/16 of an inch.
  • Surface 50 is further tangent to a forwardly extending radial surface 52which is generated by the outer point of a A of an inch radius.
  • Surface 52 as illustrated extends rearward of forward surface 20 a distance of 9/16 of an inch and preferably blends into forward surface 20 through a smallfillet R or alternately may terminate at forward surface 20, 1 and 1/16 inches above surface 26.
  • surfaces 48, 50 and 52 are always below or rearward of the extensions 38 and40 respectively of forward surface 20 and upper surface 26 and their point of intersection, i.e., they do not extend into draft gear pocket 30. Further, the broad sweeping curve formed by surfaces 48, 50 and 52 reduce stress concentration and manufacturing defects.
  • various changes may be made to the given dimensions referred to in FIG. 4. It should be appreciated that although reference has only been made in FIG. 4 to a lower fillet, identical or similar changes could be made to the upper fillet of the yoke. Further, the fillets illustrated are only side views. Those skilled in the art will recognize that they extend across the straps as a single surface.
  • a relief fillet comprising a downwardly extending surface blending into said upper surface and sloping away from said upper surface and rearwardly toward said forward surface, a curved upwardly extending surface blending into said downwardly extending surface and extending beyond said forward surface and then curving back and blending into said forward surface.
  • said curved upwardly extending surface includes an upwardly extending radial surface tangent to said downwardly extending surface, and a forwardly extending radial surface tangent to said upwardly extending radial surface and blending into said forward surface.
  • a yoke having a strap with a generally flat surface and a rear follower bearing with a generally flat surface, said flat surfaces being generally perpendicular to one another and defining therebetween a portion of a draft gear pocket, a relief fillet at the junction of said flat surfaces comprising a first surface angling away. from said flat surface of said strap, away from said draft gear pocket and toward said fiat surface of said rear follower bearing, and a second surface tangent to said first surface and joining said flat surface of said rear follower bearing, said first and second surfaces being located, other than at their junctions with said flat surfaces, away from and out of said draft gear pocket.
  • said second surface includes a first radial surface tangent to said first surface and a second radial surface tangent to said first radial surface and blending into said forward surface, said radial surfaces opening toward said draft gear pocket.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gears, Cams (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
US00168179A 1971-08-02 1971-08-02 Railway coupler yoke Expired - Lifetime US3708076A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US16817971A 1971-08-02 1971-08-02

Publications (1)

Publication Number Publication Date
US3708076A true US3708076A (en) 1973-01-02

Family

ID=22610440

Family Applications (1)

Application Number Title Priority Date Filing Date
US00168179A Expired - Lifetime US3708076A (en) 1971-08-02 1971-08-02 Railway coupler yoke

Country Status (9)

Country Link
US (1) US3708076A (fr)
JP (1) JPS4867909A (fr)
AR (1) AR193112A1 (fr)
AU (1) AU444168B2 (fr)
BE (1) BE782162A (fr)
BR (1) BR7202365D0 (fr)
CA (1) CA949031A (fr)
ES (1) ES401134A1 (fr)
SE (1) SE371617B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5193699A (en) * 1991-12-16 1993-03-16 Amsted Industries Incorporated Center sill with short yoke member for converting from coupler to drawbar arrangement without modifying center sill
US20080197096A1 (en) * 2007-02-16 2008-08-21 Strato Inc. Yoke for a railway draft gear and method of making
US20140037442A1 (en) * 2012-08-03 2014-02-06 Neil L. Tatman Anti-rotation lug for a gas turbine engine stator assembly

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1137348A (en) * 1911-10-09 1915-04-27 Universal Draft Gear Attachmen Yoke for draft-gear.
US2241353A (en) * 1939-03-23 1941-05-06 American Steel Foundries Draft connection
US3220563A (en) * 1964-08-13 1965-11-30 Amsted Ind Inc Rotary railway car coupler structure
US3613902A (en) * 1969-11-06 1971-10-19 Amsted Ind Inc Rotary dump coupler

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1137348A (en) * 1911-10-09 1915-04-27 Universal Draft Gear Attachmen Yoke for draft-gear.
US2241353A (en) * 1939-03-23 1941-05-06 American Steel Foundries Draft connection
US3220563A (en) * 1964-08-13 1965-11-30 Amsted Ind Inc Rotary railway car coupler structure
US3613902A (en) * 1969-11-06 1971-10-19 Amsted Ind Inc Rotary dump coupler

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5193699A (en) * 1991-12-16 1993-03-16 Amsted Industries Incorporated Center sill with short yoke member for converting from coupler to drawbar arrangement without modifying center sill
US20080197096A1 (en) * 2007-02-16 2008-08-21 Strato Inc. Yoke for a railway draft gear and method of making
US7926672B2 (en) * 2007-02-16 2011-04-19 Strato, Inc. Yoke for a railway draft gear and method of making
US20140037442A1 (en) * 2012-08-03 2014-02-06 Neil L. Tatman Anti-rotation lug for a gas turbine engine stator assembly
US10240467B2 (en) * 2012-08-03 2019-03-26 United Technologies Corporation Anti-rotation lug for a gas turbine engine stator assembly

Also Published As

Publication number Publication date
AU444168B2 (en) 1974-01-02
AU3983072A (en) 1973-12-06
ES401134A1 (es) 1975-02-16
SE371617B (fr) 1974-11-25
BR7202365D0 (pt) 1973-05-31
AR193112A1 (es) 1973-03-30
JPS4867909A (fr) 1973-09-17
BE782162A (fr) 1972-10-16
CA949031A (en) 1974-06-11

Similar Documents

Publication Publication Date Title
US4605133A (en) Coupler knuckle
US3722708A (en) Reduced slack coupler
US5511676A (en) Coupler yoke with tapering key slot reinforcement
US3856156A (en) Railway car coupler
JPH02135363U (fr)
US4593827A (en) Railway car drawbar connection with guided slack adjusting wedges
JPS63189174A (ja) ウツド型ゴルフクラブのヘツド
US3708076A (en) Railway coupler yoke
US3604569A (en) Railway coupler shank having a key slot
US8607998B2 (en) Railway car yoke
US4051954A (en) Coupler butt end replacement method and part
CA2395875A1 (fr) Machoire d'attelage de wagon a surface d'appui amelioree
US4438855A (en) Railway coupler shelf chamfer
US1890981A (en) Forged dipper tooth
US5931101A (en) Light weight draft sill
US2772791A (en) Railway coupler
US3858729A (en) Railway coupler shank keyslot contour
US3860121A (en) Railway coupler shank
USRE29011E (en) Railway Coupler Shank Keyslot Contour
US3635358A (en) Coupler arrangement
US3973681A (en) Transition casting for use in sills of freight cars
EP1060971A1 (fr) Attelage ferroviaire du type E avec zone de captage étendue
US2079552A (en) Car underframe
US1890997A (en) Forged dipper tooth
US3568857A (en) Coupler keyslot bearing contour