US2546029A - Side bearing for car trucks - Google Patents

Side bearing for car trucks Download PDF

Info

Publication number
US2546029A
US2546029A US652146A US65214646A US2546029A US 2546029 A US2546029 A US 2546029A US 652146 A US652146 A US 652146A US 65214646 A US65214646 A US 65214646A US 2546029 A US2546029 A US 2546029A
Authority
US
United States
Prior art keywords
rocker
rocker member
bearing
car
roller
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
US652146A
Other languages
English (en)
Inventor
Otis T Gregg
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.)
GREGG CAR Co Ltd
GREGG CAR COMPANY Ltd
GREGG Co Ltd
GREGG COMPANY Ltd
Original Assignee
GREGG CAR Co Ltd
GREGG Co Ltd
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 BE471621D priority Critical patent/BE471621A/xx
Application filed by GREGG CAR Co Ltd, GREGG Co Ltd filed Critical GREGG CAR Co Ltd
Priority to US652146A priority patent/US2546029A/en
Application granted granted Critical
Publication of US2546029A publication Critical patent/US2546029A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B61F5/14—Side bearings

Definitions

  • This invention relates to improvements in antifriction types of side bearings for railroad cars.
  • a railroad car of the conventional type has a long rectangular underframe or platform which rests on two trucks, one being situated near each end of the car.
  • the platform is carried on the trucks by means of center bearings situated on laterally extending truck bolsters.
  • side bearings including bearing elements on the truck bolsters and on the underframe are placed some distance apart laterally of the truck bolsters, with approximately one-eight inch clearance between the bearing elements. Tilting of the car body relatively to 2 ward motion exceeds the slight clearance between the bearing elements, the roller will bind between the supporting member and the car frame bearing element during turning movements of the car truck and resist turning of the truck.
  • the car trucks during normal operation, are subjected to continuous vibration from the rail joints and because of other irregularities in the track.
  • the rollers of the bearings are subjected to vibration which may be of the same fundamental frequency as, or a hearthe truck bolsters is limited by the clearance between the side bearing elements.
  • the roller type of side bearing often consists of a solid cylindrical roller that is usually supported on the bolster and is arranged to roll a limited distance in a direction parallel to the rails.
  • the roller usually is supported on a plate having a slightly concave surface so that the roller normally has a tendency to return to its center position when the roller is out of engagement with the bearing element on the underframe.
  • the roller must be moved a substantial distance from its center position before there is any substantial tendency for it to return to its center position.
  • An object of the present invention is to provide roller or anti-friction type side bearings which are capable of rolling or rocking movement without rising and which are self-centering.
  • Another object of the invention is to provide anti-friction side bearings that are self-centering and which can be used with a flat supporting element to avoid change in the clearance between the bearing elements.
  • a further object of the invention is to provide a side bearing of the anti-friction or rocking type that permits additional turning of the car truck relatively to the car frame without damage to the bearing even when the turning exceeds the amount afiorded by the limited travel of the roller or rocker.
  • Another object of the invention is to provide a side bearing construction for car trucks in which the bearing member is not responsive to vibrations set up during the operation of the truck so that it will always tend to remain in its center position ready to permit relatively frictionless turning of the truck relative to the car body.
  • Another object of the invention is to provide a vibration damping mechanism and centering means for side bearings of car trucks and to provide a bearing of novel form which is self-centering.
  • the objects of the invention are attained by the provision of a novel type of self-centering roller or rocker Whichcan be supported by a flat plate so that the roller or rocker does not rise as it rolls.
  • side bearings of the type embodying the present invention' may 'be'provided with rollers or rockers that are provided with relatively movable stabilizing means, ;such as a weight or weights which are arranged so that when the rocker or roller rocks, its upwardly moving portion lifts the weight or a portion of it and its downwardly-moving-portion is relieved of the weight.
  • relatively movable stabilizing means such as a weight or weights which are arranged so that when the rocker or roller rocks, its upwardly moving portion lifts the weight or a portion of it and its downwardly-moving-portion is relieved of the weight.
  • the'rocker of the side bearing may be provided withione or more eccentric portions that engage or carry a relativel movable weight or weights which are also supported by the bearing plate or box on the car truck bolster.
  • the eccentric portion or portions are normally disposed in such a position that upward movement thereof lifts a weight and downward movement of the eccentric portion substantially disengages it from a weight. In this way, even a slight rocking movement Of the rocker unbalances it and tends to return it to its center position.
  • a preferred form of :the device is a rocker provided withoutwardly extending arms having flat surfaces tangent to the surface of the rocker so that if the turning movement of the truck is greater than would normally be afforded by the rolling motion of the rocker, the truck can turn farther by relative sliding movement between fiat surfaces on the rocker and the .car body. Inasmuch as the fiat surfaces areof substantial area, the friction between the contacting surfacesis not excessive and the turning movement of the car truck is not substantially hindered.
  • the stabilizing means also absorbs vibrations set up in it and thereby acts as a vibration damper to prevent rocking Of the rocker in response to such vibrations.
  • the stabilizing means is alternately lifted and restored to its support.
  • the relative movement of the stabilizing :means and the eccentric portion of the rocker introduces considerable friction. This relative movement and friction act to absorb the vibration and change the .fundamental frequency'of the rocker repeatedly and thus damp the harmonic motion This damping effect is present whether the rocker is moved substantially or only very slightly from its center position.
  • Figure l is a plan view of a typical bearing member embodying the invention.
  • Figure 2 is a view in section taken online 22 of Figure 1;
  • Figure 3 is a side view of a modified form of rocker embodying the present invention.
  • Figure 4 is a side view of a modified form of bearing member embodying the invention with the bearing box shown in section;
  • Figure 5 is a plan .view of the bearing shown in Figure 4.
  • Figures :6 and 7 are side'views of other forms upper surface-of acar truck bolster, or formed as a ;part thereof.
  • the bottom of the bearing box it ⁇ may be :provided with a hardened steel supporting orbearing plate H which is substan tially flat from end to end and from edge to edge.
  • a rocker member l2 of cylindrical shape is rockably :mounted in the bearing box and is adapted to engage a bearing plate It on the undersurface :ofqa ,cross member on the car under- .frame, not shown.
  • the rocker member 12 is designed to be .constantly centered whereby it is always in position to afford relatively frictionless turnin of the bolster relative to the car underframe.
  • the rocker member 12 'mayihavea radius of about two and one-half inches although the length of the radius and the .shapeof the rocker member can be varied, depending upon requirements.
  • the rockermember I2 has a pair of diametrically spaced pinsl i and i5 eccentric to the axis ,of the rockermember and projecting from one .of its ends which are adapted to engage an elongated stabilizing member it in the form of a'bar of steel, iron orxthe like.
  • the ends of the stabilizing member l6 rest upon the pins i? and 1-8 that extend inwardly from a side of the bearing box Hi.
  • the pinsil' tand I 5 may be connected bymeans .ofa web forming, ineffect, a continuous platform for supporting the bar H3.
  • the stabilizing means described above and'the stabilizing means described hereinafter also act effectively as vibration dampers. It will be clear that as the bar-l6, for example, is raised and lowered, it changes the effective mass of the rocker member l2 and also introduces some frictional resistance to movement of the rocker member. The vibrations thus are absorbed frictionally and by the work done in lifting the bar it. Also the fundamental frequency of the rocker member is changed by the change in its effective mass and the rocker member is rendered less responsive to vibrations at a fixed frequency and its harmonics.
  • FIG 3 of the drawings discloses another form of rocker member and stabilizing and vibration damping means.
  • the cylindrical rocker member 20 is provided with diametrically spaced arms 2! and 22 which are provided with the transverse holes 23 and 24.
  • rocker member disclosed in Figure 3 cperates similarly to the rocker member l2, in that when the rocker member 2 rolls toward the right,
  • the pin is lifted while the arm 22 is relieved of the weight of the pin 26.
  • the weight of the pin 25, therefore, acts to restore the rocker member 26 to its center position.
  • the pin 28 acts to restore the rocker member to its center position when it moves toward the left.
  • rocker member of the side bearing does not have to be cylindrical and in the preferred forms of the invention, the rocker members are provided with semi-cylindrical mid-portions, and fiat surfaced arms tangent to the semi-cylindrical portions.
  • one form of the preferred type of rocker member 30 may have a semi-cylindrical mid-portion 3
  • a generally U-shaped stabilizing member 39 is mounted in an opening that extends lengthwise of the rocker member 30 and through its undersurfaces 35 and 31.
  • the ends 39a and 39b of the member 39 are normally substantially in engagement with the supporting member 38 when the mid-portion 390 of the member 39 is in engagement with a flat inner surface 4
  • the opening 40 is shaped so that the stabilizing member 39 can be completely inserted into the opening 40.
  • the member 39 is of such weight that it will tend to retain the rocker member 30 in its center position. When the rocker member 30 tends to rock in one direction or the other, it lifts one end of the stabilizing member 39 and is relieved of the weight of the other end of the member 39.
  • the stabilizing member 39 also, being movable relatively to the rocker member 39 will absorb vibration in the manner described above.
  • the above-described rocker member 30 may be provided with means for preventing it from sliding along the supporting member 38, if desired.
  • the rocker member 30 is provided at opposite sides with laterally projecting lugs 42, each of which is situated at or near the bottom of the rocker member 3 and at or near its center.
  • the lugs 42; 42 are received in channels 43 and 44 in opposite sides of the bearing box 45 and thus prevent substantial endwise sliding movement of the rocker member 30.
  • rocker member 30 and its stabilizing means can be modified considerably, as illustrated in Figures fi and 7 of the drawings.
  • the rocker member 59 which is of a shape similar to the rocker member 30, described above, is provided at its opposite ends with substantially vertical apertures 5
  • the stabilizing means for the rocker member is susceptible to still further modifications and may be arranged as shown in Figure '7.
  • ] has contours like the rocker members 3 and and includes the arms 6
  • the arms have the grooves 33 and 64 therein which extend substantially vertically along the lateral surfaces of the arms and horizontally across the tops of the arms.
  • U-shaped weights 65 and 66 are mounted loosely in and are substantially complemental to the grooves 63 and 64. The ends of the weights and 66 are substantially in engagement with the supporting member 61 when the weights are both suspended from the arms 6
  • the U-shaped weights therefore, are supported eccentrically of the axis of the rocker member and act like the stabilizing members described above in returning the rocker member an to its center position and in damping vibration of the rocker member 60.
  • Each of the rocker members 50 and 60 may be provided with lugs like the lugs 42 of the rocker member 30.
  • a side bearing for railroad cars comprising a rocker member having semicylindrical upper and lower surfaces, means supporting said rocker .memberzfor Iockingimovement, stabilizing means having'weight portions i'onopposite sides of the axisoi said trock'er -member, and substantially diametrically spaced elements .:on said rocker member eccentric to'the axis oflsaid rocker memher for lifting one ofsaid weight portions upon rocking movement of said rocker member from an initial-position, :whereby theliited weight portion urges-said rocker member toward said initial position.
  • a side'bearing for railroad cars comprising a rocker member having semieylindricai upperzand lower surfaces, arms projecting outwardly-rrom opposite sides or" said rccser member, and weight meansshiftable relatively to said rocker 'member and carried by said for stabilizingsaid rocker member.
  • a side bearing for railroad car trucks comprising a bearing boX adapted to be mounted on a car truck, arocker member in said box, rocker member having upper and lower semicylindrical portions, arm's projecting outwardly from opposite sides or" said rocker member and having upper and lower outwardly converging flat sides tangent to said surface portions, and Weight means movably carried by said arms and :engageable. and disengageahle with said bearing box on opposite .sides of said rocker member for stabilizing the latter and dampening its vibrations;
  • Aside bearing for railroad cars comprising a bearing box adapted to be mounted on a car truck, a rocker member in said said rocker member having upper and lower semicylindrical surface portions, arms on and projecting outwardly in opposite directions from said rocker .member, and weight means carried b said arms lindrical upper-sandflower ;surfacesi rockablysup ported on the bottom of saiclibox and havin outwardly iprojecting arms on :its opposite :sides, means forming ,,,passages in :said arms substam tially perpendicular to said'arms, weightvmembers slidablyrmounted in :saidpassages, landcooperating "means on said weight members and said arm for limiting downward movement of said weight members.
  • a side bearing for railroad cars comprising a rocker member vhaving semicylindrical upper and lower surfaces, a substantially -U-shap'ed weight member mounted within said rocker-membar and having a .midportion anti downwardly projecting arms at its opposite ends, and means Within said rocker member "engaging :said midportion for suspending said 'U-shaped member for movement relatively to said rocker member.
  • a side bearing for railroad cars comprising a box-like member adapted to be mounted on a car truck, a rocker member having upper and lower semicylindrical surfaces and arms extending in opposite directions therefrom, said rocker member being rockably mounted in said box'so that one arm moves upwardly while the other moves downwardly, said rocker member having an aperture extending therethrough lengthwise of said arms and opening downwardly toward the bottom of said box-like member, a U-shaped weight member loosel mounted in said opening and having :downwardly extending ends engageable with the bottom of said box-likemember, said weight member being movable relatively to said rocker member to allow rocking .-movement of the latter while exerting :a downward thrust on the upwardly moving arm and relievingthe opposite arm of downward thrust.
  • a side bearing for railroad cars comprising a rocker member having semi--cylindrica1 upper and lower surface portions and arms having outwardly converging flat surfaces on opposite sides of and tangent to said semi-"cylindrical portions, means supporting said rocker member for rocking movement on said semi-cylindrical portions, means on-oneof said rocker members forcentering it on said supporting means, and weight means movably carried by said arms for stabilizing said rocker member anddampeningits vibrations.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vibration Prevention Devices (AREA)
US652146A 1946-03-05 1946-03-05 Side bearing for car trucks Expired - Lifetime US2546029A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BE471621D BE471621A (uk) 1946-03-05
US652146A US2546029A (en) 1946-03-05 1946-03-05 Side bearing for car trucks

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US652146A US2546029A (en) 1946-03-05 1946-03-05 Side bearing for car trucks

Publications (1)

Publication Number Publication Date
US2546029A true US2546029A (en) 1951-03-20

Family

ID=24615686

Family Applications (1)

Application Number Title Priority Date Filing Date
US652146A Expired - Lifetime US2546029A (en) 1946-03-05 1946-03-05 Side bearing for car trucks

Country Status (2)

Country Link
US (1) US2546029A (uk)
BE (1) BE471621A (uk)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1360781A (en) * 1919-04-03 1920-11-30 William H Miner Counterbalanced roller-bearing
US1640034A (en) * 1923-07-21 1927-08-23 Miner Inc W H Counterbalanced side bearing
US1660444A (en) * 1924-01-18 1928-02-28 Miner Inc W H Side bearing
US1674821A (en) * 1924-03-24 1928-06-26 Miner Inc W H Antifriction bearing
US1796300A (en) * 1928-10-18 1931-03-17 Miner Inc W H Antifriction bearing

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1360781A (en) * 1919-04-03 1920-11-30 William H Miner Counterbalanced roller-bearing
US1640034A (en) * 1923-07-21 1927-08-23 Miner Inc W H Counterbalanced side bearing
US1660444A (en) * 1924-01-18 1928-02-28 Miner Inc W H Side bearing
US1674821A (en) * 1924-03-24 1928-06-26 Miner Inc W H Antifriction bearing
US1796300A (en) * 1928-10-18 1931-03-17 Miner Inc W H Antifriction bearing

Also Published As

Publication number Publication date
BE471621A (uk)

Similar Documents

Publication Publication Date Title
US3286653A (en) Tracking truck
US2053990A (en) Anti-oscillating device
US2458210A (en) Snubbed truck
RU2674394C1 (ru) Группа пружин фрикционного клина тележки железнодорожного вагона
US2324267A (en) Truck
US2296106A (en) Radial truck
US2355450A (en) Car truck
US5331902A (en) Truck boltser with laterally wider friction show pocket and mechanism for lateral travel of the friction shoe
US20130327246A1 (en) Railcar constant contact side bearing assembly
US2211463A (en) Car truck
US2387072A (en) High-speed railway car truck
US2546029A (en) Side bearing for car trucks
US4132176A (en) Hydraulically dampened railway truck bolster
US2652001A (en) Railway truck
US2538380A (en) Railway truck
US2740359A (en) Railway truck
RU2677959C1 (ru) Фрикционный клин тележки железнодорожного вагона
US2527008A (en) Railroad car truck
US2170862A (en) Car truck
US2709971A (en) Rail truck squaring means
US2625117A (en) Mounting of plank on swing hangers for railway trucks
US2206487A (en) Railway car truck
US2317399A (en) Railway truck
US2843058A (en) Railway truck bolster structure
US2717559A (en) Railway truck spring suspension