US20180257677A1 - Railway car truck friction shoe spring group - Google Patents
Railway car truck friction shoe spring group Download PDFInfo
- Publication number
- US20180257677A1 US20180257677A1 US15/453,546 US201715453546A US2018257677A1 US 20180257677 A1 US20180257677 A1 US 20180257677A1 US 201715453546 A US201715453546 A US 201715453546A US 2018257677 A1 US2018257677 A1 US 2018257677A1
- Authority
- US
- United States
- Prior art keywords
- friction shoe
- spring
- railway car
- coil spring
- car truck
- 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.)
- Abandoned
Links
- 239000000725 suspension Substances 0.000 claims abstract description 31
- 230000003068 static effect Effects 0.000 claims abstract description 6
- 238000013016 damping Methods 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 3
- 229910001018 Cast iron Inorganic materials 0.000 claims 2
- 229910001208 Crucible steel Inorganic materials 0.000 claims 2
- 239000002131 composite material Substances 0.000 claims 1
- 229920001971 elastomer Polymers 0.000 claims 1
- 239000000806 elastomer Substances 0.000 claims 1
- 229920000642 polymer Polymers 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- B61F5/04—Bolster supports or mountings
- B61F5/12—Bolster supports or mountings incorporating dampers
- B61F5/122—Bolster supports or mountings incorporating dampers with friction surfaces
-
- 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
- B61F5/06—Bolster supports or mountings incorporating metal springs
-
- 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
- B61F3/00—Types of bogies
- B61F3/02—Types of bogies with more than one axle
-
- 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
- B61F5/50—Other details
Definitions
- the invention relates generally to railway car truck friction damping arrangements, and more particularly to a railway car truck friction shoe spring group.
- the present invention is directed to a friction shoe suspension control spring group for a railroad car truck and in particular to a suspension control spring group having three concentrically nested coil springs and to a friction shoe including a body having a sloped face and a vertical face.
- the suspension control spring group applies force to the friction shoe which dissipates energy throughout the range of suspension travel thereby controlling the relative motion between the side frames and bolster as the railway car travels down the track.
- Railroad car trucks of a design known as a three piece railway car truck include a pair of spaced apart side frames and a bolster that extends transversely between the side frames.
- the bolster is resiliently supported at each end on a respective side frame by a plurality of suspension springs.
- Wedge shaped friction shoes are used in such railroad car trucks to dampen movement of the bolster with respect to the side frame of the railroad car truck.
- Friction shoes are usually generally triangular wedge shaped such that two laterally spaced sloped faces are each in contact with one of two laterally spaced sloped faces of the bolster.
- the friction shoe is also comprised of a vertical face that is in contact with a corresponding wear plate mounted on a vertical face of a side frame column.
- the wear plate on the vertical column of the side frame is usually comprised of steel. Accordingly, the friction shoe acts as a motion damping wedge between the bolster and the wear plate on a vertical column of the side frame.
- the friction shoe also is comprised of a bottom section that joins the vertical face and the two laterally sloped face.
- the bottom section includes a spring lug in the form of a hollow protrusion extending form the bottom section.
- Such design spring lug saves weight as it has a hollow core. Further, the bottom of the spring lug is open which allows water or other debris to pass out of the friction shoe.
- the friction shoe is wedged into engagement between the sloped faces of the bolster and the vertical column of the side frame by a suspension control spring group.
- a suspension control spring group typically comprises one or two concentrically grouped coil springs, or an elastomeric solid or hollow spring may comprise one or more of the springs in the spring group.
- FIG. 1 is an exploded isometric view of a railway car truck in accordance with an embodiment of the present invention
- FIG. 2 is a detailed partial isometric view of a portion of a railway car truck in accordance with an embodiment of the present invention
- FIG. 3 is a isometric view of a friction shoe in accordance with an embodiment of the present invention.
- FIG. 4 is a bottom view of a friction shoe in accordance with an embodiment of the present invention.
- FIG. 5 is a side view of a friction shoe in accordance with an embodiment of the present invention.
- FIG. 6 is an exploded isometric view of a friction shoe and spring group in accordance with an embodiment of the present invention.
- FIG. 7 is a partial cross sectional view of an assembled spring group in accordance with an embodiment of the present invention.
- a friction wedge 8 of the present invention is shown in a railroad car truck.
- the railway car truck includes two side frames 2 which are spaced apart and generally parallel to one another.
- Each side frame 2 includes a bolster opening 13 formed by a pair of spaced apart vertical columns 14 .
- a planar wear plate 15 is connected to the interior surface of each column 14 .
- the railway car truck also includes a bolster 1 which extends generally transversely between the side frames 2 .
- Each end 12 of the bolster 1 is located within a respective bolster opening 13 and is vertically supported on a side frame 2 by a plurality of helical coil suspension springs 10 .
- the bolster end 12 is also supported by the friction shoes 8 which themselves are supported by suspension control springs 9 .
- suspension control springs 9 and suspension springs 10 are themselves supported on a spring support section 16 of each side frame 2 .
- Suspension control springs 9 and suspension springs 10 are resiliently compressible to thereby allow the ends of the bolster 1 to move vertically upwardly and downwardly within the bolster openings 13 and with respect to the side frames 2 .
- Each bolster end 12 includes a plurality of sloped walls 22 .
- Each sloped wall 22 is adapted to engage a sloped surface 20 of a respective friction shoe 8 .
- Friction shoe 8 is seen to provide a damping force to the vertical motion of bolster 1 while supported on suspension control springs 9 and suspension springs 10 as the railway car travels on the rails.
- Railway wheels 4 are mounted on axles 3 .
- Axle bearings 5 are mounted on the ends of axles 3 .
- Bearing adaptor 6 and pad 7 are provided to receive axle bearings in side frame pedestal openings 2 A.
- Center bowl 11 on the top surface of bolster 1 is provided to help support the railway freight car on the truck.
- friction shoe 8 includes a body 17 .
- Body 17 is generally triangular or wedge-shaped.
- the body 17 includes a base having a generally horizontal bottom wall 34 .
- the bottom base surface 34 is adapted to engage the top end of a set of concentrically nested suspension control springs 9 .
- the body 17 also includes a generally vertical front wall includes a front face 19 .
- the body 17 also includes a sloped surface 29 which may be comprised of laterally spaced sloped walls 20 and 20 A that extend at an inclined angle of thirty-five to forty-five degrees between the base 34 and vertical front face 19 and approximately 150 to 178 degrees relative to each other. Sloped surface 29 is adapted to engage inclined walls 22 of the bolster 1 .
- the proportion of combined spring rates of the suspension control spring group engaging with the friction shoes to the combined spring rates of the suspension springs engaging with the bolster is between 12 and 18 percent in the empty railway car truck condition and between 20 and 27 percent in the loaded railway car truck condition.
- a single friction shoe inner, middle and outer coil spring provide a normal force on the column wear plate of between 3000 and 5000 pounds in the static empty railway car truck condition and between 7,500 and 12,000 pounds force under the static loaded railway car truck condition.
- the front face 19 of friction shoe body 17 is in direct contact with and extends from an intersection 31 with bottom base surface 34 .
- Front face 19 of friction shoe body 17 is in direct contact with and extends from an intersection with top edge 25 of center spacing section 21 of sloped surface 29 .
- Bottom base surface 34 may include a spring lug 37 extending therefrom.
- Spring lug 37 is usually cylindrical in shape, with a bottom surface 41 of spring lug 37 is flat when it engages with the inner suspension control spring 44 .
- the friction shoe 8 may be made from metals such as steel or iron.
- suspension control spring group 9 is shown to comprise an outer coil spring 42 , a middle coil spring 43 located concentrically inside outer coil spring 42 , and an inner coil spring 44 located concentrically inside middle coil spring 43 .
- Outer coil spring 42 , middle coil spring 43 , and inner coil spring 44 may be comprised of steel coil springs or solid or hollow elastomeric springs.
- Middle coil spring 43 is seen to surround the outer cylindrical surface of spring lug 37 .
- Inner coil spring 44 is seen to contact bottom surface 41 of spring lug 37 upon sufficient compressive force downward onto spring group 9 . Under empty or lightly loaded railcar conditions, spring group 9 may be uncompressed 110 and not in contact the friction shoe bottom surface 34 or spring lug bottom surface 41 .
- the damping force by the friction shoe 8 can vary as may be selected from the various materials for friction shoe body 17 and the force with which the front face 19 is impinged against side frame column wear plate 15 which is directly related to the vertical force applied to the bottom of the friction shoe 8 by the suspension control spring group 9 .
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Springs (AREA)
- Vibration Prevention Devices (AREA)
Abstract
Description
- The invention relates generally to railway car truck friction damping arrangements, and more particularly to a railway car truck friction shoe spring group.
- The present invention is directed to a friction shoe suspension control spring group for a railroad car truck and in particular to a suspension control spring group having three concentrically nested coil springs and to a friction shoe including a body having a sloped face and a vertical face. The suspension control spring group applies force to the friction shoe which dissipates energy throughout the range of suspension travel thereby controlling the relative motion between the side frames and bolster as the railway car travels down the track.
- Railroad car trucks of a design known as a three piece railway car truck include a pair of spaced apart side frames and a bolster that extends transversely between the side frames. The bolster is resiliently supported at each end on a respective side frame by a plurality of suspension springs. Wedge shaped friction shoes are used in such railroad car trucks to dampen movement of the bolster with respect to the side frame of the railroad car truck. Friction shoes are usually generally triangular wedge shaped such that two laterally spaced sloped faces are each in contact with one of two laterally spaced sloped faces of the bolster. The friction shoe is also comprised of a vertical face that is in contact with a corresponding wear plate mounted on a vertical face of a side frame column. The wear plate on the vertical column of the side frame is usually comprised of steel. Accordingly, the friction shoe acts as a motion damping wedge between the bolster and the wear plate on a vertical column of the side frame.
- The friction shoe also is comprised of a bottom section that joins the vertical face and the two laterally sloped face. The bottom section includes a spring lug in the form of a hollow protrusion extending form the bottom section. Such design spring lug saves weight as it has a hollow core. Further, the bottom of the spring lug is open which allows water or other debris to pass out of the friction shoe.
- The friction shoe is wedged into engagement between the sloped faces of the bolster and the vertical column of the side frame by a suspension control spring group. Such spring group typically comprises one or two concentrically grouped coil springs, or an elastomeric solid or hollow spring may comprise one or more of the springs in the spring group. Resistance to sliding movement of the friction shoe with respect to the side frame, which in turn provides dampening of vertical bolster movement, is provided by the frictional forces generated between the friction shoe vertical face and a wear plate on the side frame vertical column. This also provides improved truck squaring capability and warp stiffness.
- It is an object of the present invention to provide an improved railway car truck suspension control spring group and friction shoe that is comprised of three concentrically nested springs wherein the damping frictional force on the vertical movement of the bolster is better controlled with greater energy dissipation.
-
FIG. 1 is an exploded isometric view of a railway car truck in accordance with an embodiment of the present invention; -
FIG. 2 is a detailed partial isometric view of a portion of a railway car truck in accordance with an embodiment of the present invention; -
FIG. 3 is a isometric view of a friction shoe in accordance with an embodiment of the present invention; -
FIG. 4 is a bottom view of a friction shoe in accordance with an embodiment of the present invention; -
FIG. 5 is a side view of a friction shoe in accordance with an embodiment of the present invention; -
FIG. 6 is an exploded isometric view of a friction shoe and spring group in accordance with an embodiment of the present invention, and -
FIG. 7 is a partial cross sectional view of an assembled spring group in accordance with an embodiment of the present invention. - Referring now to
FIG. 1 , afriction wedge 8 of the present invention is shown in a railroad car truck. The railway car truck includes two side frames 2 which are spaced apart and generally parallel to one another. Each side frame 2 includes a bolsteropening 13 formed by a pair of spaced apartvertical columns 14. Aplanar wear plate 15 is connected to the interior surface of eachcolumn 14. The railway car truck also includes a bolster 1 which extends generally transversely between the side frames 2. Eachend 12 of the bolster 1 is located within a respective bolster opening 13 and is vertically supported on a side frame 2 by a plurality of helicalcoil suspension springs 10. Thebolster end 12 is also supported by thefriction shoes 8 which themselves are supported bysuspension control springs 9. Thesuspension control springs 9 andsuspension springs 10 are themselves supported on aspring support section 16 of each side frame 2.Suspension control springs 9 andsuspension springs 10 are resiliently compressible to thereby allow the ends of the bolster 1 to move vertically upwardly and downwardly within thebolster openings 13 and with respect to the side frames 2. Eachbolster end 12 includes a plurality ofsloped walls 22. Each slopedwall 22 is adapted to engage a slopedsurface 20 of arespective friction shoe 8.Friction shoe 8 is seen to provide a damping force to the vertical motion of bolster 1 while supported onsuspension control springs 9 andsuspension springs 10 as the railway car travels on the rails. - Railway wheels 4 are mounted on
axles 3.Axle bearings 5 are mounted on the ends ofaxles 3.Bearing adaptor 6 and pad 7 are provided to receive axle bearings in sideframe pedestal openings 2A. Center bowl 11 on the top surface of bolster 1 is provided to help support the railway freight car on the truck. - As best shown in
FIG. 2 ,friction shoe 8 includes abody 17.Body 17 is generally triangular or wedge-shaped. Thebody 17 includes a base having a generallyhorizontal bottom wall 34. Thebottom base surface 34 is adapted to engage the top end of a set of concentrically nestedsuspension control springs 9. Thebody 17 also includes a generally vertical front wall includes afront face 19. Thebody 17 also includes asloped surface 29 which may be comprised of laterally spacedsloped walls base 34 and verticalfront face 19 and approximately 150 to 178 degrees relative to each other.Sloped surface 29 is adapted to engageinclined walls 22 of the bolster 1. The proportion of combined spring rates of the suspension control spring group engaging with the friction shoes to the combined spring rates of the suspension springs engaging with the bolster is between 12 and 18 percent in the empty railway car truck condition and between 20 and 27 percent in the loaded railway car truck condition. A single friction shoe inner, middle and outer coil spring provide a normal force on the column wear plate of between 3000 and 5000 pounds in the static empty railway car truck condition and between 7,500 and 12,000 pounds force under the static loaded railway car truck condition. - As best shown in
FIGS. 3, 4, and 5 , thefront face 19 offriction shoe body 17 is in direct contact with and extends from anintersection 31 withbottom base surface 34.Front face 19 offriction shoe body 17 is in direct contact with and extends from an intersection withtop edge 25 ofcenter spacing section 21 of slopedsurface 29.Bottom base surface 34 may include aspring lug 37 extending therefrom.Spring lug 37 is usually cylindrical in shape, with abottom surface 41 ofspring lug 37 is flat when it engages with the innersuspension control spring 44. Thefriction shoe 8 may be made from metals such as steel or iron. - Referring now to
FIGS. 6 and 7 , suspensioncontrol spring group 9 is shown to comprise anouter coil spring 42, amiddle coil spring 43 located concentrically insideouter coil spring 42, and aninner coil spring 44 located concentrically insidemiddle coil spring 43. -
Outer coil spring 42,middle coil spring 43, andinner coil spring 44 may be comprised of steel coil springs or solid or hollow elastomeric springs.Middle coil spring 43 is seen to surround the outer cylindrical surface ofspring lug 37.Inner coil spring 44 is seen to contactbottom surface 41 ofspring lug 37 upon sufficient compressive force downward ontospring group 9. Under empty or lightly loaded railcar conditions,spring group 9 may be uncompressed 110 and not in contact the frictionshoe bottom surface 34 or springlug bottom surface 41. - The damping force by the
friction shoe 8 can vary as may be selected from the various materials forfriction shoe body 17 and the force with which thefront face 19 is impinged against side framecolumn wear plate 15 which is directly related to the vertical force applied to the bottom of thefriction shoe 8 by the suspensioncontrol spring group 9.
Claims (21)
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/453,546 US20180257677A1 (en) | 2017-03-08 | 2017-03-08 | Railway car truck friction shoe spring group |
CA2995796A CA2995796A1 (en) | 2017-03-08 | 2018-02-21 | Railway car truck friction shoe spring group |
ZA2018/01241A ZA201801241B (en) | 2017-03-08 | 2018-02-23 | Railway car truck friction shoe spring group |
MX2018002796A MX2018002796A (en) | 2017-03-08 | 2018-03-05 | Railway car truck friction shoe spring group. |
RU2018107988A RU2674394C1 (en) | 2017-03-08 | 2018-03-05 | Group of springs of the friction wedge trolley of the railway car |
AU2018201619A AU2018201619A1 (en) | 2017-03-08 | 2018-03-06 | Railway car truck friction shoe spring group |
BR102018004478A BR102018004478A2 (en) | 2017-03-08 | 2018-03-06 | railway wagon trick, and, friction shoe. |
CN201810188952.9A CN108569307A (en) | 2017-03-08 | 2018-03-08 | The friction shoe groups of springs of bogies for railway vehicles |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/453,546 US20180257677A1 (en) | 2017-03-08 | 2017-03-08 | Railway car truck friction shoe spring group |
Publications (1)
Publication Number | Publication Date |
---|---|
US20180257677A1 true US20180257677A1 (en) | 2018-09-13 |
Family
ID=63446161
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/453,546 Abandoned US20180257677A1 (en) | 2017-03-08 | 2017-03-08 | Railway car truck friction shoe spring group |
Country Status (8)
Country | Link |
---|---|
US (1) | US20180257677A1 (en) |
CN (1) | CN108569307A (en) |
AU (1) | AU2018201619A1 (en) |
BR (1) | BR102018004478A2 (en) |
CA (1) | CA2995796A1 (en) |
MX (1) | MX2018002796A (en) |
RU (1) | RU2674394C1 (en) |
ZA (1) | ZA201801241B (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20180265101A1 (en) * | 2017-03-20 | 2018-09-20 | Amsted Rail Company, Inc. | Railway car truck with friction shoes |
CN110497924A (en) * | 2019-08-21 | 2019-11-26 | 中建空列(北京)工程设计研究院有限公司 | A kind of empty rail pipeline transportation system for tunnel |
CN110497923A (en) * | 2019-08-21 | 2019-11-26 | 中建空列(北京)工程设计研究院有限公司 | Empty rail pipeline transportation system |
USD885977S1 (en) * | 2017-05-16 | 2020-06-02 | Koppers Delaware, Inc. | Anti-rail rollover device |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU192706U1 (en) * | 2019-07-01 | 2019-09-26 | Акционерное общество "Научно-производственная корпорация "Уралвагонзавод" имени Ф.Э. Дзержинского" | Spring suspension of a biaxial truck of a freight car |
RU206251U1 (en) * | 2021-04-09 | 2021-09-02 | Общество с ограниченной ответственностью "Всесоюзный научно-исследовательский центр транспортных технологий" (ООО "ВНИЦТТ") | SPRING SUSPENSION OF A TWO-AXLE CARGO WAGON TROLLEY |
CN114701531A (en) * | 2022-04-14 | 2022-07-05 | 中车长江车辆有限公司 | Joint vehicle set |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7174837B2 (en) * | 2003-06-25 | 2007-02-13 | Asf-Keystone, Inc. | Three-piece motion control truck system |
Family Cites Families (11)
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US4915031A (en) * | 1981-06-29 | 1990-04-10 | Hansen, Inc. | Railway truck damping assembly |
RU2101205C1 (en) * | 1996-04-18 | 1998-01-10 | Инженерный центр "Сплав" | Freight car bogie friction shock absorber |
US6371033B1 (en) * | 1999-10-05 | 2002-04-16 | Trn Business Trust | High capacity integrated railway car truck |
RU2523513C2 (en) * | 2002-12-09 | 2014-07-20 | Открытое акционерное общество "Научно-производственная корпорация "Уралвагонзавод" имени Ф.Э. Дзержинского" | Friction shock absorber for railway car truck |
RU44623U1 (en) * | 2004-01-30 | 2005-03-27 | Общество с ограниченной ответственностью "БАМ-АКТИВ" и К | WEDGE OF A TRUCK OF A LOAD RAILWAY CAR |
US7527131B1 (en) * | 2008-10-06 | 2009-05-05 | Amsted Rail Company, Inc. | Railway freight car truck |
CN101797926B (en) * | 2010-04-22 | 2011-08-24 | 齐齐哈尔轨道交通装备有限责任公司 | Bogie |
CN101830234B (en) * | 2010-04-27 | 2011-11-16 | 南车长江车辆有限公司 | Oblique wedge vibration damper for railway freight car bogie |
CN102975735B (en) * | 2012-08-27 | 2015-11-25 | 齐齐哈尔轨道交通装备有限责任公司 | A kind of spring damping damping arrangement and apply the bogie truck of this device |
WO2014131117A1 (en) * | 2013-03-01 | 2014-09-04 | National Steel Car Limited | Truck and sideframe therefor |
CN105151070A (en) * | 2015-09-10 | 2015-12-16 | 南车二七车辆有限公司 | Dual-mode wedge for bogie damping device |
-
2017
- 2017-03-08 US US15/453,546 patent/US20180257677A1/en not_active Abandoned
-
2018
- 2018-02-21 CA CA2995796A patent/CA2995796A1/en not_active Abandoned
- 2018-02-23 ZA ZA2018/01241A patent/ZA201801241B/en unknown
- 2018-03-05 MX MX2018002796A patent/MX2018002796A/en unknown
- 2018-03-05 RU RU2018107988A patent/RU2674394C1/en active
- 2018-03-06 BR BR102018004478A patent/BR102018004478A2/en not_active IP Right Cessation
- 2018-03-06 AU AU2018201619A patent/AU2018201619A1/en not_active Abandoned
- 2018-03-08 CN CN201810188952.9A patent/CN108569307A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7174837B2 (en) * | 2003-06-25 | 2007-02-13 | Asf-Keystone, Inc. | Three-piece motion control truck system |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20180265101A1 (en) * | 2017-03-20 | 2018-09-20 | Amsted Rail Company, Inc. | Railway car truck with friction shoes |
US10543858B2 (en) * | 2017-03-20 | 2020-01-28 | Amsted Rail Company, Inc. | Railway car truck with friction shoes |
USD885977S1 (en) * | 2017-05-16 | 2020-06-02 | Koppers Delaware, Inc. | Anti-rail rollover device |
CN110497924A (en) * | 2019-08-21 | 2019-11-26 | 中建空列(北京)工程设计研究院有限公司 | A kind of empty rail pipeline transportation system for tunnel |
CN110497923A (en) * | 2019-08-21 | 2019-11-26 | 中建空列(北京)工程设计研究院有限公司 | Empty rail pipeline transportation system |
Also Published As
Publication number | Publication date |
---|---|
ZA201801241B (en) | 2018-12-19 |
CA2995796A1 (en) | 2018-09-08 |
RU2674394C1 (en) | 2018-12-07 |
MX2018002796A (en) | 2018-11-09 |
BR102018004478A2 (en) | 2019-01-02 |
AU2018201619A1 (en) | 2018-09-27 |
CN108569307A (en) | 2018-09-25 |
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