US2884141A - Draft gear - Google Patents

Draft gear Download PDF

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Publication number
US2884141A
US2884141A US448411A US44841154A US2884141A US 2884141 A US2884141 A US 2884141A US 448411 A US448411 A US 448411A US 44841154 A US44841154 A US 44841154A US 2884141 A US2884141 A US 2884141A
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United States
Prior art keywords
yoke
gear
column
compensating
plunger
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
US448411A
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English (en)
Inventor
Harry W Mulcahy
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.)
W H MINER Inc
Original Assignee
W H MINER 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
Priority to BE540416D priority Critical patent/BE540416A/xx
Application filed by W H MINER Inc filed Critical W H MINER Inc
Priority to US448411A priority patent/US2884141A/en
Application granted granted Critical
Publication of US2884141A publication Critical patent/US2884141A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61G—COUPLINGS; DRAUGHT AND BUFFING APPLIANCES
    • B61G9/00—Draw-gear
    • B61G9/04—Draw-gear combined with buffing appliances
    • B61G9/06—Draw-gear combined with buffing appliances with rubber springs

Definitions

  • Another object of the invention is to provide in a draft gear as set out in the previous paragraph, key means registrable with the casing members to maintain the gear as a unitary structure for shipping and to facilitate in stalling the gear in the yoke of a railway draft rigging.
  • Another object of the invention is to provide :in a comv pensating device for railway draft rigging, a resilient column maintained under compression to maintain the gear .tight in the yoke and to provide for limiting the .maximum compression to which the compensating column may be subjected.
  • Figure l is a plan view of the draft gear installed in the rigging
  • Figure 2 is a cross sectional view through the horizontal median .plane of the gear, with .the keys in place for shipping;
  • Figure v3 is a fragmentary view, partly in section,.show ing the gear installed in a yoke aud pocket of normal length;
  • Figure 4 is a fragmentary view, partly in section,lshow ing the gear installed in a yoke that is shorter than the pocket;
  • Figure 5 is a ,fragmentary viewpart'ly in section, showing the gear installed in a yoke that is longer .than the pocket;
  • ⁇ Figure 6 is a rear elevational view of the gear with the keys i-n pla-ce for shipping;
  • Figure 7 is a rear end elevational view df the .compensator housing.
  • Figure 8 is a rear end .elevational view of the vcompensating plunger.
  • Draft gears for railway draft rigging tit within the yoke of the rigging and into a pocket between the sills and door of the vehicle, which pocket is defined in length by lugs securedto the sills.
  • the usual draft .gear consists of a casing enclosing a resilient column that is maintained under compression and bears against a ⁇ pressure applying means to keep that ⁇ means projecting from one 4Mend of the casing.
  • the rear end olf the casing 'bears against the rear lugs and rear end of the yoke.
  • a ollower bears against the pressure applying means and front lugs.
  • Vthe gear of the present invention consists of two ,casing members, each open at one end and these members are aligned ⁇ with the open .ends adjacent.
  • a resilient column and a compensator housing Within the casing is a resilient compensating column and a plunger which projects therefrom and through an ,opening in the rear end of the rear casing member.
  • the front casing member bears against the front lugs and the yoke and the rear casing member bears against the rear lugs.
  • the plunger bears against the rear end of the yoke.
  • Both the main resilient column and the resilient compensating vcolumn are maintained under compression normally and the gear is maintained ⁇ tight in the pocket and yoke, notwithstanding variations yin the lengths thereof.
  • the gear .of the present invention consists of a front casing member A, a rear casing member B, a main resilient column composed of a plurality of resilient pads C arranged in groups with separators D interposed between the groups, one of the separators E 'bridging the gap between the adjacent ⁇ ends of the casing members A and B.
  • Fitted within the rear casing member B is ⁇ a ⁇ compensating housing F in which a compensating plunger G .is litted and urged outwardly of the housing by a compensating resilient 4column H that iis maintained 4under compression at all times.
  • Casing members A and B are provided ⁇ with perforations with which 'keys K may be registered when the casing is shortened slightly below its normal length, the keys serving to hold the gear together as a unit to facili- ⁇ tate ⁇ shipping .and serving also to maintain the overall length olf the gear and compensating plunger slightly less .than .the length of the opening in the yoke, thereby to Tfacilitate installing the gear in the yoke.
  • the front casing member A in the embodiment shown by -way ⁇ of example is of rectangular cross section having a solid front wall 10 that engages the front lugs 11 of the pocket and also engages the yoke 12. Side walls '13 of the front member A contain perforations 14 into which the keys fit.
  • the Ifront wall 10 contains rearwardly lextending projections 15 :by which the resilient column units C are maintained in place lwith respect to the member A.
  • the rear casing member Bis provided at its rear end with inwardly lturned tlanges 16 and 17, defining between .them a rectangular opening 18 centered in the end 4of the Jmember. It will be noted that the flanges '-17 are .thinner than the flanges 16, forming a groove 19 Athat opens outwardly of the rear end of the member. Side walls 20 of the .member 'B 'are provided with perforations 21 into which the keys K are registered.
  • a -compensating housing F comprisinga vfront wall 22, from which anges 23 and 24 project into engagement with the llanges 16 .and 17, respectively.
  • Thefront wall '22 contains lbosses y25 :and -sockets 125 by which the resilient pads C and the compensating column :H are maintained in Iplace with respect to compensating housing 'F.
  • the compensating plunger G comprises ya'flanged base portion 26 that telescopes between the ilanges 23 and 24 ⁇ of ⁇ the housing and engages ilanges 16 and "17 of ⁇ the casing member VB.
  • the compensating plunger is 4provided lwith a main section 27 that projects beyond pensating columnH which, in the example shown,'con .sists or rubber pads bonded ⁇ to metal plates, which pads are of known design.
  • the pads contain sockets into which bosses 25 register and bosses 28 that project into sockets 29 in the base 26 of the plunger to maintain a resilient column in aligment.
  • the main resilient column consists of three groups of pads of known design, which are fitted between the front wall 22 of the compensating housing and the front wall of the front casing member A.
  • Separators D are provided with flanges 30 that engage the side walls of the casing members to maintain the column against lateral movement under the forces of compression.
  • separator E is of I-section, having a web 35 from both faces of which flanges 36 project, these anges being of such dimension as to span the gap between the adjacent ends of the side walls of casing members A and B.
  • casing member B In assembling the gear, casing member B is placed with flanges 16 and 17 lowermost, the compensating plunger G is then inserted, compensating column members H registered with the plunger, and the housing F then installed in place.
  • the main resilient column is then added, with separators D and E interposed, after which the front casing member A is added. It will be noted that centering the first pad C with respect to the front wall 22 of housing F is facilitated by bosses 31 at the corners of the wall 22. With the casing member B in assembling position, these bosses 31 project upwardly and the column member C drops into place between them.
  • the main column is then compressed sufficiently to permit keys K to be registered with the perforations 14 and 21, after which the forces compressing the column are removed and the gear is held together as a unit by the keys.
  • the gear is shipped with the keys in place and upon installation in a draft rigging the gear is fitted within the opening in the yoke and the keys then removed to permit installing the yoke and gear in the pocket of a vehicle.
  • the fianges 16 project beyond the rear face of the compensating plunger 27 into engagement with the lugs 40 in the manner best seen in Figure 4, the rear portion 41 of the yoke moving into the groove 19 and the compensating plunger 27 moving into the compensating housing further compressing the compensating column H.
  • compensating plunger 27 is forced outwardly to maintain tight engagement with the rear portion 41 of the yoke in the manner shown in Figure 5.
  • the portion 12 of the yoke acting upon the front wall 10 of the casing member A moves that casing member away from the lugs 11, thereby to compress the main resilient column.
  • This rearward movement of the yoke causes the rear portion 41 thereof to move a corresponding distance, causing the compensating plunger 27 to be moved rearwardly until the base portion 26 thereof engages the flanges l16 and 17.
  • the yoke moves forwardly, pushing the compensating plunger 27 inwardly of the casing and compressing compensating column units H, this movement continuing until the yoke 41 engages anges 17 of the casing member B. Additional forward movement of the yoke transmits forces directly to the casing member B, thereby to move it forwardly and compress the main resilient column rather than the compensating column.
  • the gear of the present invention will be maintained tight in the pocket of a vehicle and in the yoke thereof, notwithstanding that there may be variations in the respective lengths of the pocket and yoke.
  • the compensating column which is of lower resistance than the main column, is compressed only to a limited extent and overloading of this column is thereby definitely prevented.
  • a draft gear comprising a pair of casing members both of which are open at one end and one of which is closed at its other end, flanges projecting inwardly from the other end of the other one of said members defining an opening therein, said members being disposed with their open ends adjacent, a housing disposed in said other member and consisting of side walls engaging said flanges and extending therefrom to ra main wall disposed parallel to the open end of the member; a main resilient column in said casing members one end of which abuts against said closed end and the other end abuts against said main wall, said main column being compressed by engagement of said closed end and said flanges with said lugs to maintain the gear tight in the pocket; a plunger comprising a 'main portion engaging said end of
  • a draft gear comprisng: a pair of casing members both open at one end; an end wall closing the front end of the front member; flanges projecting inwardly from the rear end of the rear member and forming an opening therein, said members being disposed with their open ends adjacent; a housing disposed in said rear member, said housing comprising a main wall disposed transversely of the member and side walls projecting rearwardly therefrom into engagement with said fianges; a main resilient column abutted at its front end against said end wall and abutted at its rear end against said main Wall, said main column being compressed by engagement of said end wall with said front lugs and engagement of said flanges with said rear lugs to maintain the gear tight in the pocket; a plunger comprising a main portion engaging said end
  • a draft gear comprising: a metallic casing member of rectangular cross section having an open end and a closed end, said closed end containing a rectangular perforation centered coincident with the end Wall of the member, said end wall having thin sections above and below said perforation forming a groove opening outwardly of the end wall, a second metallic casing member of rectangular cross seetion having an open end and a closed end, said members being disposed in alignment with their open ends adjacent; a compensating device within said first casing member comprising a housing, a plunger, and a resilient column engaging said housing and plunger; a main resilient column within said casing members and engaging said housing and the end wall of said second casing member, said end walls of said casing members engaging said lugs to maintain said main column under compression thereby to maintain said
  • a draft gear comprising: a metallic casing member of rectangular cross section having an open end and a closed end, said closed end containing a rectangular perforation centered coincident with the end wall of the member, said end wall having thin sections above and below said perforation forming a groove opening outwardly of the end wall; a second metallic casing member of rectangular cross section having an open end and a closed end, said members being disposed in alignment with their open ends adjacent; a device within said first member for compensating for misalignment of said lugs and the end of the yoke comprising: a housing, a plunger and a resilient column engaging said housing and plunger; a main resilient column within said casing members engaging said housing and the end wall of said second casing member

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gears, Cams (AREA)
US448411A 1954-08-09 1954-08-09 Draft gear Expired - Lifetime US2884141A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BE540416D BE540416A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1954-08-09
US448411A US2884141A (en) 1954-08-09 1954-08-09 Draft gear

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Application Number Priority Date Filing Date Title
US448411A US2884141A (en) 1954-08-09 1954-08-09 Draft gear

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US2884141A true US2884141A (en) 1959-04-28

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US448411A Expired - Lifetime US2884141A (en) 1954-08-09 1954-08-09 Draft gear

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BE (1) BE540416A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US773387A (en) * 1901-08-26 1904-10-25 Standard Coupler Co Draft and buffing rigging.
US1123356A (en) * 1913-02-24 1915-01-05 William H Miner Draft-rigging for railway-cars.
US1683822A (en) * 1927-02-28 1928-09-11 Miner Inc W H Shock-absorbing mechanism
US1876019A (en) * 1928-10-23 1932-09-06 Thomas H Taylor Draft gear
US2410933A (en) * 1943-11-24 1946-11-12 Lewis D Freeman Cushioning device
US2521834A (en) * 1946-12-26 1950-09-12 Miner Inc W H Friction shock absorbing mechanism
US2640603A (en) * 1950-03-18 1953-06-02 Nat Malleable & Steel Castings Cushioning mechanism for railway vehicles

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US773387A (en) * 1901-08-26 1904-10-25 Standard Coupler Co Draft and buffing rigging.
US1123356A (en) * 1913-02-24 1915-01-05 William H Miner Draft-rigging for railway-cars.
US1683822A (en) * 1927-02-28 1928-09-11 Miner Inc W H Shock-absorbing mechanism
US1876019A (en) * 1928-10-23 1932-09-06 Thomas H Taylor Draft gear
US2410933A (en) * 1943-11-24 1946-11-12 Lewis D Freeman Cushioning device
US2521834A (en) * 1946-12-26 1950-09-12 Miner Inc W H Friction shock absorbing mechanism
US2640603A (en) * 1950-03-18 1953-06-02 Nat Malleable & Steel Castings Cushioning mechanism for railway vehicles

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BE540416A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

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