WO2006080774A1 - Ensemble roue a modification de calibre pour vehicule de chemin de fer - Google Patents

Ensemble roue a modification de calibre pour vehicule de chemin de fer Download PDF

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Publication number
WO2006080774A1
WO2006080774A1 PCT/KR2005/004522 KR2005004522W WO2006080774A1 WO 2006080774 A1 WO2006080774 A1 WO 2006080774A1 KR 2005004522 W KR2005004522 W KR 2005004522W WO 2006080774 A1 WO2006080774 A1 WO 2006080774A1
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WO
WIPO (PCT)
Prior art keywords
locking
gauge
wheel
flange
railway vehicle
Prior art date
Application number
PCT/KR2005/004522
Other languages
English (en)
Inventor
Seung-Ho Jang
Original Assignee
Korea Railroad Research Institute
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 claimed from KR1020050007360A external-priority patent/KR100614613B1/ko
Priority claimed from KR1020050042281A external-priority patent/KR100599047B1/ko
Priority claimed from KR1020050121519A external-priority patent/KR100708485B1/ko
Application filed by Korea Railroad Research Institute filed Critical Korea Railroad Research Institute
Publication of WO2006080774A1 publication Critical patent/WO2006080774A1/fr

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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
    • B61F7/00—Rail vehicles equipped for use on tracks of different width

Definitions

  • the present invention relates , in general , to gauge- adjustable wheelsets for railway vehicles and, more particularly, to a gauge-adjustable wheelset for a railway vehicle which automatically changes a gauge thereof such that the railway vehicle is able to travel between two kinds of railways having different gauges , and which includes : an axle, having a sliding part and a cap mounting part ; a wheel fitted over the sliding part of the axle so as to be movable in a left or right direction; a support cap securely fitted over the cap mounting part of the axle; a locking block rotatably fitted over the support cap, so that left or right movement of the wheel is controlled by rotation of the locking block; a flange coupled to the right end of the support cap to control a locking or unlocking operation of the locking block; a spring holder coupled to the left end of the support cap; and a compression spring provided between the flange and the spring holder, thus reducing the number of elements and the manufacturing costs , being easily mounted to a bogie thanks
  • the present invention relates to a gauge- adjustable wheelset for a railway vehicle which simply realizes a gauge-adjustable system and has a structure such that elements thereof are easily assembled and disassembled.
  • the present invention relates to gauge- adjustable wheelsets for railway vehicles and, more particularly, to a gauge-adjustable wheelset for a railway vehicle which automatically changes the distance between opposite wheels such that the railway vehicle is able to travel on railways having different gauges, and which prevents locking elements from being contaminated by water, dust or filth, thus ensuring the smooth operation and superior performance of the wheelset .
  • Spain first began studies on gauge-adjustable systems and put them to practical use .
  • Spain adopted broad-gauge rails (1, 668mm) for the purpose of preventing the invasion of neighboring countries, and, subsequently, Spain continued to use broad- gauge rails .
  • broad-gauge rails (1, 668mm)
  • the management of the broad-gauge rails causes several problems that result from the difference in gauge between broad-gauge rails and standard-gauge rails
  • Patent No . EP0873930 (1998) is shown in FIGS . 3 and 4.
  • a gauge-adjustable wheelset disclosed in Poland Patent No . PL181969 includes a locking unit, in which elastic rod-shaped elements 2 , each having a predetermined length, are disposed around an axle at regular angular intervals and serve to control lateral movement of a wheel .
  • elastic rod-shaped elements 2 typically, twenty to thirty rod-shaped elements 2 are used.
  • the rod- shaped elements 2 must be repeatedly bent for gauge conversion, so that a problem of fatigue of the rod-shaped elements 2 occurs .
  • the locking unit consists of twenty or more elements 2 , there is a problem in that high costs are incurred in order to maintain and repair them.
  • three pairs of locking levers 3 are used as a locking unit, and a compression spring is disposed in a circumferential direction.
  • this gauge-adjustable wheelset the locking levers 3 protrude from the axle to relatively high heights in a direction perpendicular to the axle, that is, outwards with respect to the axle, and, when a locking or releasing process is executed, the locking levers 3 protrude further outwards with respect to the axle . Therefore, this gauge-adjustable wheelset is problematic in that the overall volume of the locking unit is increased, and the structure is complex.
  • the conventional gauge-adjustable wheelset has a structure such that an outer cylindrical body, serving as a cover, pushes the locking levers to realize locking motion of the locking levers . Therefore, the outer cylindrical body made of metal should be relatively thick in order to ensure the strength thereof . The outer cylindrical body serves to protect interior elements .
  • this gauge-adjustable wheelset is problematic in that, when it is desired to inspect the locking unit and other elements for maintenance and repair of the gauge-adjustable wheelset, the wheelset must be completely disassembled.
  • an object of the present invention is to provide a gauge-adjustable wheelset for a railway vehicle which automatically changes a gauge thereof such that the railway vehicle is able to travel between two kinds of railways having different gauges, and which includes : an axle, having a sliding part and a cap mounting part; a wheel fitted over the sliding part of the axle so as to be movable in a left or right direction; a support cap securely fitted over the cap mounting part of the axle; a locking block rotatably fitted over the support cap, so that left or right movement of the wheel is controlled by circumferential rotation of the locking block; a flange coupled to a right end of the support cap to control a locking or unlocking operation of the locking block; a spring holder coupled to a left end of the support cap; and a compression spring provided between the flange and the spring holder, thus reducing the number of elements and the manufacturing costs, being easily mounted to a bogie thanks to
  • Another object of the present invention is to provide a gauge-adjustable wheelset for a railway vehicle in which the spring holder has a removable mounting structure such that a process of assembling or disassembling the elements including the locking block, the flange, the support cap, the compression spring and the spring holder can be easily executed, and which has a structure such that, even if a relatively large force is applied between the wheels and the rails, the wheels can continue to rotate together with the axle .
  • a further object of the present invention is to provide a gauge-adjustable wheelset which makes it possible for a railway vehicle to travel two kinds of railways having different gauges and prevents locking operation related elements and the junction between the wheel and the axle from being contaminated by water or dust, and which has a structure such that inspection of the elements, for example, ascertainment of whether an element is damaged, can be easily conducted without completely disassembling the elements .
  • Yet another object of the present invention is to provide a gauge-adjustable wheelset which makes it possible to reduce the effort and cost required for maintenance and repair, increase reliability, and ensure stable transportation in the operation of a railway vehicle that travels on two kinds of railways having different gauges .
  • the present invention provides a gauge-adjustable wheelset for a railway vehicle that automatically changes a gauge thereof such that the railway vehicle travels between two kinds of railways having different gauges .
  • the gauge-adjustable wheelset comprises : an axle, with a sliding part and a cap mounting part provided on the axle; a wheel fitted over the sliding part of the axle so as to be movable in a leftward or rightward direction; a support cap securely fitted over the cap mounting part of the axle; a locking block rotatably fitted over the support cap, so that left or right movement of the wheel is controlled by circumferential rotation of the locking block; a flange coupled to a right end of the support cap to control a locking or unlocking operation of the locking block; a spring holder coupled to a left end of the support cap; and a compression spring provided between the flange and the spring holder.
  • the wheel may include : an extension part that integrally extends towards a medial portion of the axle; and a plurality of locking pieces provided on a circumferential outer surface of the extension part .
  • Each of the locking pieces may have a plurality of locking notches therein.
  • the support cap may include: a stopper provided on a right end of the support cap and supporting the flange; a locking key extending from a left surface of the stopper and preventing the flange from rotating in a circumferential direction of the axle; a plurality of extension parts provided on a left end of the support cap and coupled to the spring holder; and a plurality of guide slots defined between the extension parts, so that the locking pieces of the wheel are inserted into respective guide slots such that the wheel is integrally rotated along with the axle .
  • the flange may include : a disk plate provided on a right end of the flange and being brought into contact with a release rail such that the flange is moved leftward or rightward; a key notch, into which the locking key provided on the support cap is inserted; a locking blade inserted into a blade slot formed in the locking block, so that the locking block is locked to or rotated by the locking blade; and a spring receiving part, by which the compression spring is held.
  • the locking blade of the flange may include : a horizontal part extending in a horizontal direction; and an inclined part angled from the horizontal part .
  • the locking block may include : a blade slot formed in a right end of the locking block, so that a locking blade provided on the flange is inserted into and moved in the blade slot; a plurality of locking protrusions provided on a left end of the locking block, so that, when the wheelset is in a locked state, the locking protrusions are inserted into related locking notches of the wheel ; and a plurality of insertion notches formed around respective locking protrusions, so that locking pieces of the wheel are inserted into respective insertion notches in a locked or unlocked state .
  • the blade slot of the locking block may include : a horizontal slot part and an inclined slot part which correspond to a horizontal part and an inclined part provided in the locking blade of the flange .
  • the spring holder may include : a support plate contacting a left end of the compression spring, so that a compression force of the compression spring is applied to the support plate; a spring receiving part provided on an outer edge of a surface of the support plate to prevent the compression spring from moving; a cap fastening part provided on a circumferential inner edge of the support plate and fastened to the extension parts of the support cap,- and a plurality of locking piece receiving notches formed in the support plate around the cap fastening part, so that each of the locking pieces of the wheel is inserted into each of the locking piece receiving notches so as to be movable leftward or rightward.
  • a gauge-adjustable wheelset for a railway vehicle automatically changes a gauge thereof such that the railway vehicle travels between two kinds of railways having different gauges .
  • the gauge-adjustable wheelset comprises : an axle, with a sliding part and a cap mounting part provided on each of opposite ends of the axle; a wheel, with a through hole formed in the wheel so that the axle is inserted into the through hole, an extension part protruding from a predetermined portion adjacent to a circumferential edge of the through hole, and a plurality of locking pieces provided on a circumferential outer surface of the extension part; a support cap securely fitted over the cap mounting part of the axle; a locking block rotatably fitted over the support cap, so that a path along which the wheel is moved in an axial direction is controlled by circumferential rotation of the locking block; a flange to rotate the locking block in a direction using a release rail and to rotate the locking block in an opposite direction using a compression spring;
  • the support cap may include : a coupling body fitted over an outer surface of the cap mounting part of the axle; a plurality of locking keys protruding from a circumferential outer surface of the coupling body and preventing the flange from rotating in a circumferential direction of the axle,- a stopper provided on a first end of the coupling body and supporting the flange; a plurality of extension parts provided on a second end of the support cap and coupled to the spring holder; and a plurality of guide slots defined between the adjacent extension parts, so that the locking pieces of the wheel are inserted into the respective guide slots such that the wheel is integrally rotated along with the axle .
  • the spring holder may include : a support plate having a disk shape, with a through hole formed at a central position through the support plate so that the axle is inserted into the through hole; a spring receiving part protruding from an outer edge of a first surface of the support plate; a plurality of coupling parts protruding from a second surface of the support plate at predetermined positions adjacent to a circumferential edge of the through hole, the coupling parts being coupled to the support cap; and a plurality of guide slots formed between adjacent coupling parts, so that the locking pieces of the wheel move along respective guide slots .
  • a plurality of movable slots may be formed in the extension part of the wheel such that ends of locking bolts are movable in the respective movable slots, a screw hole may be formed in each of the extension parts of the support cap, and a coupling hole may be formed in each of the coupling parts of the spring holder, so that the locking bolts are tightened into the coupling holes and the screw holes, which are respectively formed in the coupling parts of the spring holder and in the extension parts of the support cap, and the end of each locking bolt is movably inserted into each of the movable slots, which are formed in the extension part of the wheel .
  • the coupling parts of the spring holder may comprise three coupling parts .
  • the flange may include : a disk plate supporting the compression spring and being brought into contact with the release rail ; a spring receiving part protruding from a surface of the disk plate in a cylindrical shape and preventing the compression spring from moving; a plurality of extension parts extending from predetermined positions on a circumferential edge of a through hole, into which the support cap is inserted; a locking blade protruding from each of the extension parts, so that the locking blades move along respective blade slots, formed in the locking block, thus guiding rotation of the locking block; and a plurality of key notches formed between the adjacent extension parts and guiding movement of locking keys of the support cap .
  • the locking block may include : a blade slot, along which each locking blade of the flange is moved; a plurality of locking protrusions to engage with related locking notches of the wheel, thus supporting the wheel; and a plurality of insertion notches, in which respective locking pieces of the wheel are placed and moved.
  • a gauge-adjustable wheelset for a railway vehicle comprises : an external cover provided around an axle outside a wheel; and an internal cover, having a cylindrical shape, coupled at a first end thereof to an inner surface of the wheel and coupled at a second end thereof to a flange .
  • the gauge-adjustable wheelset may further comprise an air vent hole formed through the wheel such that air circulates between an external space defined by the external cover and an internal space defined by the internal cover.
  • the external cover may include : an external cover plate fitted over the axle; and an external cover pipe coupled at a first end thereof to the external cover plate and coupled at a second end thereof to an outer surface of the wheel using a bolt coupling unit .
  • the gauge-adjustable wheelset may further comprise an external assistant ring to press the second end of the external cover pipe .
  • the external cover pipe may comprise a bellows pipe .
  • the flange may be provided with an extension part that extends towards the wheel, and the second end of the internal cover may be coupled to the extension part of the flange using a bolt coupling unit .
  • the gauge-adjustable wheelset may further comprise an internal assistant ring to press the second end of the internal cover.
  • the internal cover may have a bellows shape .
  • a gauge-adjustable wheelset for railway vehicles has a structure such that a process of locking or unlocking the position of a wheel can be executed using a single locking block, thus reducing the number of elements .
  • the elements are integrally operated in conjunction with each other without using a coupling means such as a bolt .
  • the structural strength thereof is increased, so that the maintenance and repair thereof are easy, thus reducing maintenance and repair costs .
  • the volume in a direction perpendicular to the axle is markedly reduced, so that the present invention can be easily mounted to a bogie, compared to the conventional techniques .
  • the present invention has a structure capable of reducing rotational inertia, there is an advantage of saving energy.
  • a spring holder is coupled both to the wheel and to an end of a support cap using bolts, pins or keys but not using a force-fitting or welding method. Therefore, when it is desired to replace a flange, a spring or a locking block, which constitutes the gauge-adjustable wheelset, with a new one, a process of disassembling the spring holder from the support cap and reassembling it therewith is easily executed, thus reducing expense and effort required to maintain and repair the wheelset .
  • locking pieces of the wheel are reliably supported in guide slots defined by a plurality of coupling parts, which extend from an edge of a through hole of the spring holder.
  • an external cover and an internal cover are respectively provided outside and inside the wheel .
  • the junction between the wheel and the axle and the locking operation related elements are prevented from being contaminated by water or dust .
  • junctions between the gauge-conversion related elements and other elements are prevented from being contaminated, thus preventing corrosion of the elements, an increase in friction, and malfunction of locking blades .
  • the present invention makes it possible to reduce effort and expense required for maintenance and repair, increase reliability, and ensure stable transportation.
  • FIG. 1 is a sectional view of a gauge-adjustable wheelset according to a first conventional technique
  • FIG. 2 is an exploded perspective view showing the gauge-adjustable wheelset according to the first conventional technique
  • FIG. 3 is a sectional view of a gauge-adjustable wheelset according to a second conventional technique
  • FIG. 4 is views showing the operation of the gauge- adjustable wheelset according to the second conventional technique
  • FIG. 5 is an exploded perspective view of a gauge- adjustable wheelset for railway vehicles, according to a first embodiment of the present invention
  • FIG. 6 is detailed views showing a wheel used in the gauge-adjustable wheelset according to the present invention.
  • FIG. 7 is detailed views showing a support cap used in the gauge-adjustable wheelset according to the present invention
  • FIG. 8 is detailed views showing a flange used in the gauge-adjustable wheelset according to the present invention.
  • FIG. 9 is detailed views showing a locking block used in the gauge-adjustable wheelset according to the present invention.
  • FIG. 10 is detailed views showing a spring holder used in the gauge-adjustable wheelset according to the present invention.
  • FIG. 11 is views showing a process of assembling the gauge-adjustable wheelset according to the present invention
  • FIG. 12 is a plan view and a sectional view showing a railway gauge conversion system, on which the operation of the gauge-adjustable wheelset of the present invention is conducted
  • FIG. 13 is views showing the operation of the gauge- adjustable wheelset according to the present invention
  • FIG. 14 is views showing the coupling between the flange and the locking block of the gauge-adjustable wheelset according to the present invention
  • FIG. 15 is views showing the coupling between the wheel and the locking block of the gauge-adjustable wheelset according to the present invention
  • FIG. 16 is a perspective view of an assembled gauge- adjustable wheelset for railway vehicles, according to a second embodiment of the present invention.
  • FIG. 17 is a detailed view showing a wheel of the gauge-adjustable wheelset of FIG. 16 ;
  • FIG. 18 is a detailed view showing a support cap of the gauge-adjustable wheelset of FIG. 16 ;
  • FIG. 19 is a detailed view showing a flange of the gauge-adjustable wheelset of FIG. 16 ;
  • FIG. 20 is a detailed view showing a locking block of the gauge-adjustable wheelset of FIG. 16 ;
  • FIG. 21 is detailed views showing a spring holder of the gauge-adjustable wheelset of FIG. 16;
  • FIG. 22 is views showing a process of assembling the gauge-adjustable wheelset of FIG. 16 ;
  • FIG. 23 is a view of a gauge-adjustable wheelset for railway vehicles in which covers are provided, according to a third embodiment of the present invention.
  • FIG. 24 is a view showing the gauge-adjustable wheelset of FIG. 23 from which the covers have been removed;
  • FIG. 25 is a sectional view showing the operation of the gauge-adjustable wheelset of FIG. 23 on a broad-gauge railway;
  • FIG. 26 is a sectional view showing the operation of the gauge-adjustable wheelset of FIG. 23 on a standard- gauge railway;
  • FIG. 27 is an enlarged view of a circled portion A of the gauge-adjustable wheelset of FIG. 25 ;
  • FIG. 28 is an enlarged view of a circled portion B of the gauge-adjustable wheelset of FIG. 25.
  • FIG. 12 is a plan view (a) and a sectional view (b) showing the railway gauge conversion system, on which the gauge-adjustable wheelset of the present invention is operated.
  • the construction of a railway for application of the present invention is shown.
  • standard-gauge rails 10 As shown in FIG. 12 , standard-gauge rails 10 , broad- gauge rails 20 , guide rails 30 , gauge conversion rails 40 and release rails 50 are required for operation of the gauge-adjustable wheelset of the present invention.
  • the gauge conversion rails 40 are provided between the standard-gauge rails 10 and the broad-gauge rail 20.
  • the gauge conversion rails 40 serve to guide conversion of the gauge .
  • the guide rails 30 serve to prevent wheels 200 from becoming derailed during the gauge conversion and guide a gradual change of the gauge .
  • the release rails 50 have a parallel section and narrowing/widening sections, and guide lateral movement of flanges 400 for realizing the gauge conversion.
  • the construction of the gauge-adjustable wheelset according to a first embodiment of the present invention, which travels on the railway gauge conversion system, will be explained in detail .
  • the left and right sides of an axle 100 are symmetrical, therefore, for ease of description, the present invention will be explained with reference to the left side of the axle 100.
  • FIG. 6 is a perspective view of the wheel 200.
  • FIG. 6 (b) is a front view of the wheel 200.
  • FIG. 6 (c) is a side view of the wheel 200.
  • a plurality of locking pieces 220 each of which protrudes in a radial direction, is provided around the extension part 210.
  • each locking piece 220 be provided in consideration of the diameter of the axle 100, as shown in FIG. 6 (b) .
  • the number of locking notches 221 formed in each locking piece may change according to the gauge change circumstances, but, in the present invention, in consideration of manufacturing and operating conditions , two locking notches 221 are formed in each locking piece, such that the gauge can be converted between the standard- gauge rails 10 and the broad-gauge rails 20.
  • FIG. 7 (a) is a perspective view of the support cap 300.
  • FIG. 7 (b) is a front view of the support cap 300.
  • FIG. 7 (c) is a side view of the support cap 300.
  • the support cap 300 includes a stopper 310 , locking keys 320 , extension parts 330 , and guide slots 340.
  • the stopper 310 which is provided on the right end of the support cap 300 , serves to prevent the flange 400 from being excessively moved towards the medial portion of the axle by a compression spring 600 during gauge conversion or while the railway vehicle is traveling .
  • each locking key 320 extends to the left from a surface of the stopper 310 and is inserted into each key notch 420 of the flange 400 , so that the flange 400 is integrally rotated along with the axle 100 and is prevented from idling with respect to a circumferential direction of the axle .
  • the extension parts 330 are provided on a left end of the support cap and are coupled to respective cap fastening parts 730 of a spring holder 700.
  • the guide slots 340 are formed between the extension parts 330, and the locking pieces 220 of the wheel 200 are inserted into the guide slots 340 so as to be movable in left and right directions .
  • the guide slots 340 execute a role such that rotating force is applied to the locking notches 221 of the wheel 200 and, thus, the wheel 200 is integrally rotated along with the axle 100 even in an unlocked state of the locking block 500 when the locking protrusions 520 of the locking block 500 have been removed from the locking notches 221 of the wheel 200.
  • FIG. 8 (a) is a perspective view of the flange 400.
  • FIG. 8 (b) is a front view of the flange 400.
  • FIG. 8 (c) is a side view of the flange 400.
  • the flange 400 is coupled to the right end of the support cap 300 and serves to control locking of the locking block 500.
  • the flange 400 includes a disk plate 410 , the key notches 420, locking blades 430 , and a spring receiving part 440.
  • the disk plate 410 contacts the release rail 50 during gauge conversion, thus moving the flange 400 left or right .
  • the flange 400 is moved to the left against the elastic force of the compression spring 600.
  • the flange 400 is moved to the right while the elastic force of the compression spring 600 is applied to the disk plate 410.
  • the key notches 420 are fitted over the respective locking keys 320 of the support cap 300 described above, thus making it possible for the flange 400 to integrally rotate along with the axle 400 , and preventing the flange 400 from idling with respect to a circumferential direction of the axle 400.
  • each locking blade 430 has a structure, in which a horizontal part 431 extends in a lateral direction and an inclined part 432 is angled upwards from the horizontal part 431.
  • the compression spring 600 is fitted over the spring receiving part 440. The compression spring 600 is repeatedly compressed and extended between the spring receiving part 440 and a spring receiving part 720 of the spring holder 700.
  • FIG. 9 is a detailed view of the locking block 500.
  • FIG. 9 (a) is a perspective view of the locking block 500.
  • FIG. 9 (b) is a front view of the locking block 500.
  • FIG. 9 (c) is a side view of the locking block 500.
  • the locking block 500 has a diameter larger than that of the support cap 300.
  • the locking block 500 is fitted over the support cap 300 so as to be rotatable in a circumferential direction.
  • the locking block 500 includes the blade slots 510 , the locking protrusions 520 and insertion notches 530.
  • each blade slot 510 has a horizontal slot part 511 and an inclined slot part 512 , so that each locking blade 430 of the flange 400 is inserted into the blade slot 510 and moves in a lateral direction.
  • the operational relationship between the locking blades 430 and the blade slots 510 will be explained later herein.
  • the locking protrusions 520 engage with the respective locking notches 221 of the wheel 200.
  • the locking protrusions 520 are removed from the respective locking notches 221.
  • the operational relationship between the locking protrusions 520 and the locking notches 221 will be also described later herein.
  • each insertion notch 530 is formed around each locking protrusion 520 and provides a space in which each locking piece 220 is inserted and moved to the left and right when in an unlocked state .
  • the spring holder 700 serves to restrict movement of the compression spring 600 in a leftward direction.
  • FIG. 10 (a) is a perspective view of the spring holder 700.
  • FIG. 10 (b) is a front view of the spring holder 700.
  • FIG. 10 (c) is a side view of the spring holder 700.
  • the spring holder 700 includes a support plate 710, the spring receiving part 720 , the cap fastening parts 730 and the locking piece receiving notches 740.
  • the support plate 710 contacts a left end of the compression spring 600 and receives compression force therefrom.
  • the spring receiving part 720 is provided along an outside edge of the support plate 710 and prevents the compression spring 600 from moving in an undesired direction.
  • the locking piece receiving notches 740 are formed in the inner edge of the support plate 710.
  • the locking pieces 220 of the wheel 200 are inserted into the respective locking piece receiving notches 740 , so that the left or right movement of the locking pieces 220 is guided by the locking piece receiving notches 740.
  • the cap fastening parts 730 are fitted over and fixed to the respective extension parts 330 of the support cap 300 , which is securely fastened to the axle 100 , therefore the spring holder 700 also cannot be moved in a horizontal direction.
  • the support cap 300 is first fitted over the axle
  • the support cap 300 is coupled to the axle 100 by force-fitting or welding, such that they are integrated with each other (FIG. 11 (b) ) .
  • the flange 400 is fitted over the support cap 300 (FIG. 11 (c) )
  • the locking block 500 is fitted over the support cap 300 , such that the locking blades 430 of the flange 400 are inserted into the respective blade slots 510 of the locking block 500 (FIG.
  • the compression spring 600 is fitted over the locking block 500 , but, in these drawings, the process of assembling the compression spring 600 is not shown in order to clearly show the coupling relationship between the flange 400 and the locking block 500.
  • the railway vehicle still travels on the broad-gauge rails 20, but the gauge of the release rails 50 widens . Therefore, due to the shape of the release rails 50, the flange 400 is moved towards the end of the axle 100 against the elastic force of the compression spring 600 (see FIG. 13 (b) ) .
  • the inclined part 432 of the locking blade 430 of the flange 400 moves to the left and thus pushes the lower surface of the inclined slot part 512 of the locking block 500. Then, the locking block 500 rotates due to the structural shape thereof (see, FIG. 14 (b) ) .
  • the locking protrusion 520 of the locking block 500 is removed from the locking notch 221 of the wheel 200 by the rotation of the locking block 500 , so that the wheel 200 enters a state such that it is movable in a leftward or rightward direction (see, FIG. 15 (b) ) .
  • the compression spring 600 between the standard-gauge rail 10 and the release rail 50 maintains a state of being compressed and stores a restoring force.
  • the flange 400 is moved both by the structural shape of the release rail 50 and by the elastic force of the compression spring 600 in an axial direction.
  • the inclined part 432 of the locking blade 430 of the flange 400 is moved in a rightward direction, the locking block 500 is rotated and returned to the original position thereof, and the inclined part 432 of the locking blade 430 enters a state of being held by the upper and lower surfaces of the horizontal slot part 511 of the blade slot 510 , that is, a locked state (see, FIGS . 13 (d) and 14 (a) ) .
  • the locking protrusion 520 of the locking block 500 is inserted into the other locking notch 221 of the locking piece 220 of the wheel 200 (see, FIG. 15 (d) ) .
  • the railway vehicle is freed from the restriction of the release rails 50 and travels normally along the standard-gauge rails 10 , thus completing the gauge conversion of the gauge- adjustable wheelset of the present invention.
  • the operational principle of the gauge- adjustable wheelset of the present invention when the railway vehicle moves onto broad-gauge rails 20 from standard-gauge rails 10 , is the same as that when the railway vehicle moves onto standard-gauge rails 10 from broad-gauge rails 20.
  • the gauge-adjustable wheelset of the present invention has the three locking pieces 220 of the wheel 200 , the three locking protrusions 520 of the locking block 500, and the three locking blades 430 of the flange 400. Thanks to this structure, kinetic stability is ensured, and even if some element is damaged, the entire system can operate normally.
  • a gauge-adjustable wheelset for railway vehicles includes an axle 100 , which is provided with a sliding part 110 and a cap mounting part 120 , and a wheel 200 , which has therein a through hole, into which the axle 100 is inserted, an extension part 210 , which protrudes from a surface of the wheel around the through hole, and at least one locking piece 220, which is provided on the circumferential outer surface of the extension part 210.
  • the gauge-adjustable wheelset further includes a support cap 300 , which is fitted over the cap mounting part 120 of the axle 100 , and a locking block 500 , which is fitted over the support cap 300 and controls the path along which the wheel 200 moves using the circumferential rotation thereof .
  • the gauge- adjustable wheelset further includes a flange 400. When pushing force of the release rail 50 is applied to the flange 400, the flange 400 rotates the locking block 500 in one direction. When the restoring force of the compression spring 600 is applied to the flange 400, the flange 400 rotates the locking block 500 in the opposite direction.
  • the gauge-adjustable wheelset further includes a spring holder 700, which is coupled to the support cap 300.
  • the extension part 210 is integrally provided on the wheel around the through hole and extends a predetermined length towards the medial portion of the axle.
  • Movable slots 211 are formed on a sidewall of the extension part 210 at positions corresponding both to bolt holes 360 formed through an extension part 330 of the support cap 300 and to coupling holes 745 formed through a coupling part 735 of the spring holder 700 , so that an end of a locking bolt 760 , which is fastened both into a corresponding coupling hole 745 and into a corresponding bolt hole 360 , is movably inserted into a corresponding movable slot 211.
  • the locking piece 220 which protrudes in a radial direction, is provided on the circumferential outer surface of the extension part 210. Locking notches 221 are formed in the surface of the locking piece 220, so that each locking protrusion 520 of the locking block 500 is locked to one locking notch 221 of the locking piece 220. It is preferable that an appropriate number of locking pieces 220 be provided such that the wheel 200 is stably and integrally rotated along with the axle 100 by the locking pieces 220 that slide in guide slots 340 and 750 which are respectively formed in the support cap 300 and the spring holder 700. For example, in this embodiment, three locking pieces 220 are provided. Preferably, the number of locking notches 221 in each locking piece 220 is in proportion to the number of different gauges of rails .
  • the support cap 300 is fitted over the cap mounting part 120 of the axle 100 by force- fitting or welding .
  • the support cap 300 has a cylindrical shape and includes a coupling body 350 , which is fastened to the cap mounting part 120 , a stopper 310 , which protrudes from a circumferential outer surface of a first end of the coupling body 350, the extension parts 330, which longitudinally extend from a second end of the coupling body 350 , and locking keys 320 , which protrude from the circumferential outer surface of the coupling body 350.
  • the bolt holes 360 which correspond to the coupling holes 745 of the coupling part 735 of the spring holder 700, are formed in the respective extension parts 330.
  • the stopper 310 serves to prevent the flange 400 from being removed from the position thereof .
  • the locking keys 320 are inserted into key notches 420 formed in the flange 400 , so that, when the flange 400 is moved by the release rail 50 in one direction or moved by the restoring force of the compression spring 600 in the opposite direction, the locking keys 320 guide the movement of the flange 400. Furthermore, the locking keys 320 make it possible for the flange 400 to integrally rotate along with the axle 100.
  • the extension parts 330 guide the locking pieces 220 of the wheel 200 , such that the locking pieces 220 slide between the guide slots 340 formed between the extension parts 330.
  • extension parts 330 are in close contact with the locking pieces 220, which slide therebetween, thus making it possible for the wheel 220 to integrally rotate along with the axle 100.
  • the locking bolts 760 are tightened both into the coupling holes 745 of the spring holder 700 and into the bolt holes 360 of the extension parts 330 , so that the coupling part 735 of the spring holder 700 is securely coupled to the support cap 300.
  • the flange 400 is fitted over the first end of the support cap 300 and is supported by the stopper 310 of the support cap 300.
  • the flange 400 prevents the compression spring 600 from being removed, and is moved in an axial direction by the operation of both the release rail 50 and the compression spring 600 , thus guiding the locking block 500 such that the locking block 500 rotates during gauge conversion.
  • the flange 400 includes a disk plate 410 which supports the compression spring 600 , a spring receiving part 440 which has a cylindrical shape and protrudes from a surface of the disk plate 410 , and extension parts 450 which extend from the surface of the disk plate 410 around an inside edge of a through hole, which is formed through the disk plate 410 , and into which the locking cap 300 is inserted.
  • the flange 400 further includes locking blades 430 which protrude from respective extension parts 450 and are inserted into respective blade slots 510 formed in the locking block 500, so that the locking blades 430 move in the respective blade slots 510 and thus guide rotation of the locking block 500.
  • the flange 400 further includes the key notch 420 which is formed between adjacent extension parts 450 and guides movement of each locking key 320 of the support cap 300.
  • the locking block 500 has a diameter larger than that of the support cap 300 and is fitted over the support cap 300 so as to be rotatable in a circumferential direction of the axle . As shown in FIG. 20, the locking block 500 has therein the blade slots 510 , into which the locking blades 430 of the flange 400 are inserted.
  • the locking block 500 includes the locking protrusions 520 which are provided at predetermined positions so that the locking protrusions 520 are locked to the locking notches 221 of the wheel 200 to hold and support the wheel 200, and insertion notches 530, in which the respective locking pieces 220 of the wheel 200 are inserted and moved.
  • Each blade slot 510 has a horizontal slot part 511 and an inclined slot part 512 which correspond to the shape of each locking blade 430 of the flange 400 such that they are operated in conjunction with each other .
  • the locking block 500 is rotated by the surfaces of the inclined slot parts 512 in one direction.
  • the locking block 500 is rotated in the opposite direction.
  • the spring holder 700 serves both to prevent the compression spring 600 from being removed and to securely couple the wheel 200 to the axle 100.
  • FIG. 21 (a) is a first side perspective view of the spring holder 700.
  • FIG. 21 (b) is a second side perspective view of the spring holder 700.
  • the spring holder 700 has a disk shape .
  • a through hole, into which the extension part 330 of the support cap 300 is inserted, is formed at a central position through the spring holder 700.
  • the spring holder 700 includes a support plate 710 which supports the compression spring 600 , a spring receiving part 720 which extends from the outside edge of a first surface of the support plate 710, and a plurality of coupling parts 735 which protrude from a second surface of the support plate 710 around the inside edge of the through hole .
  • a guide slot 750 is formed between adjacent coupling parts 735, so that each locking piece 220 of the wheel 200 is movably inserted into the guide slot 750.
  • the coupling hole 745 is formed through each coupling part 735 at a position corresponding both to each of the movable slots 211, which are formed through the extension part 210 of the wheel 200 , and to the bolt hole 360 , which is formed through each of the extension parts 330 of the support cap 300.
  • the coupling parts 735 of the spring holder 700 are fastened to the extension parts 330 of the support cap 300 using the locking bolts 760, which are tightened both into the coupling holes 745 and into the bolt holes 360 of the support cap 300.
  • each locking bolt 760 is constructed such that the end thereof is movable in each movable slot 211 formed through the extension part 210 of the wheel 200.
  • FIG. 22 illustrates a process of assembling the gauge-adjustable wheelset of the present invention.
  • FIG. 22 (a) shows a state in which the support cap 300 is assembled with the axle 100 by force-fitting or welding, the flange 400 is fitted over the support cap 300, the locking block 500 is fitted over the support cap 300 such that the locking blades 430 of the flange 400 are inserted into the respective blade slots 510 of the locking block 500 , and the compression spring 600 is subsequently fitted over the locking block 500.
  • FIG. 22 (b) shows a process of tightening each locking bolt 760 into each coupling hole of the spring holder 700 after the spring holder 700 has been fitted over the extension part 330 of the support cap 300.
  • FIG. 22 (c) shows the spring holder 700 fastened to the extension parts 330 of the support cap 300 by the locking bolts 760, which are tightened both into the coupling holes 745 of the coupling part 735 and into the bolt holes 360 of the support cap 300.
  • the wheel 200 is thereafter fitted over the sliding part 110 of the axle 100.
  • the extension part 210 of the wheel 200 is inserted into a gap defined between the sliding part 110 and the extension part 330 of the support cap 300.
  • Each locking piece 220 is inserted both into each guide slot 750 of the spring holder 700 and into each guide slot 340 of the support cap 300.
  • each locking piece 220 is inserted into each insertion notch 530 of the locking block 500 , and each locking protrusion 520 is locked into one locking notch 221 of each locking piece 220, thereby the wheel 200 is fastened to the axle 100.
  • the wheel 200 is mounted to the axle 100 after the locking bolts 760 have been slightly loosened, such that the end of each locking bolt 760 is received into each movable slot 211 formed in the extension part 210 of the wheel 200. After the wheel 200 is disposed at a correct position, the locking bolts 760 are tightened.
  • the gauge-adjustable wheelset of the present invention having the above-mentioned construction is operated in conjunction with the railway gauge conversion system. As shown in FIGS . 12 (a) and 12 (b) , the railway gauge conversion system is provided in a gauge conversion section which connects two kinds of rails having different gauges, such as standard-gauge rails 10 and broad-gauge rails 20 , to each other.
  • the railway gauge conversion system includes gauge conversion rails 40 , which induce a gradual change of the gauge, guide rails 30 , which are provided on opposite sides of each gauge conversion rail 40 to prevent each wheel 200 from becoming derailed, and release rails 50 , which are provided between the gauge conversion rails 40 to operate the gauge-adjustable wheelset .
  • the locking blades 430 of the flange 400 are held by the horizontal slot part 511 of the blade slots 510 formed in the locking block 500, so that the locking block 500 is integrally rotated along with both the flange 400 and the axle 100 , and each locking protrusion 520 of the locking block 500 maintains a state of being locked to one locking notch 221 of each locking piece 220 of the wheel 200 (phase
  • the wheel 200 is moved towards the medial portion of the axle by reduction in the gauge of the rails (phase 3) .
  • the gauge of the release rails 50 is reduced.
  • the flange 400 is moved towards the medial portion of the axle by the restoring force of the compression spring 600.
  • the locking block 500 is rotated and returned to the original position thereof, so that the other locking notch 221 of each locking piece 220 is locked to each locking protrusion 520 of the locking block 500, and the railway vehicle travels normally along the standard-gauge rails 10 (phase 4) .
  • the spring holder 700 is fastened to the extension parts 330 of the support cap 300 using the locking bolts 760 but not using a force-fitting or welding process . Therefore, when it is desired to replace the flange 400 , the compression spring 600 , the locking block 500, the support cap 300 or the spring holder 700 with a new one, the processes of disassembling the spring holder 700 from the support cap 300 and reassembling it therewith can be easily executed.
  • FIGS . 23 through 28 show a gauge-adjustable wheelset for railway vehicles, according to a third embodiment of the present invention.
  • the gauge-adjustable wheelset according to the third embodiment of the present invention has a structure such that it can travel on standard-gauge rails 10 , broad-gauge rails 20 and narrow-gauge rails and is protected from the surroundings .
  • the gauge-adjustable wheelset includes an external cover 800, which is provided on the outer surface of a wheel 200 and around the axle 100, and an internal cover 820 , which is coupled at a first end thereof to the inner surface of the wheel 200 and coupled at a second end thereof to a flange 400.
  • the flange 400 of the third embodiment controls the rotation of a locking block 500 , which allows the wheel 200 to move in a lateral direction when the locking block 500 is rotated in a circumferential direction of the axle, thus guiding gauge conversion when the railway vehicle enters a gauge conversion section of the rails . Furthermore, after the gauge conversion has been completed, the flange 400 limits the rotation of the locking block 500 , such that the railway vehicle can travel stably.
  • a plurality of air vent holes 830a and 830b is formed through the wheel 200, such that an external space 880 defined by the external cover 800 communicates with an internal space 890 defined by the internal cover 820.
  • the external cover 800 includes an external cover plate 815 and an external cover pipe 810.
  • the external cover plate 815 has a circular plate shape, with an insertion hole formed at the central position through the external cover plate 815, so that the external cover 800 is fitted over the axle 100 through the insertion hole .
  • the external cover pipe 810 is coupled at a first end thereof to the outer edge of the external cover plate 815 by pressing and coupled at a second end thereof to the outer surface of the wheel 200 using bolt coupling units 870.
  • the first end of the external cover pipe 810 and the outer edge of the external cover plate 815 are overlapped with each other and, thereafter, bent and treated through a pressing process, thus ensuring airtightness .
  • each bolt coupling unit 870 includes a bolt, which is inserted into a bolt hole formed through the wheel 200, and a nut, which is screwed to an external threaded part formed on the end of the bolt .
  • the second end of the external cover pipe 810 is pressed on the wheel 200 , so that the external cover 800 is airtightIy coupled to the wheel 200.
  • the bolt coupling units 870 press and fasten the first end of the internal cover 820 to the wheel 200 , such that the internal cover 820 is airtightly coupled to the wheel 200.
  • first inside assistant rings 850 are further provided such that the first end of the internal cover 820 is evenly pressed onto the wheel 200.
  • the external cover 800 further includes external assistant rings 840 which serve to press the second end of the external cover pipe 810 onto the wheel 200.
  • the external assistant rings 840 evenly press the second end of the external cover pipe 810 when the bolt coupling units 870 are tightened, thus ensuring airtightness between the external cover pipe 810 and the outer surface of the wheel 200.
  • the external cover pipe 810 comprises a bellows pipe, such that, even though the volumes of the external space 880 and the internal space 890 change while the railway vehicle executes gauge conversion, the external cover 800 and the internal cover 820 are prevented from damage .
  • the external cover pipe 810 may be an elastic body to respond to changes in volume of the external and internal spaces 880 and 890.
  • the internal cover 820 may also be an elastic body to respond to changes in volume of the external and internal spaces 880 and 890.
  • the flange 400 includes an extension part 860 , which extends a predetermined length towards the wheel 200 , so that the second end of the internal cover 820 is coupled to the extension part 860 of the flange 400 through bolt coupling units 875.
  • second inside assistant rings 855 are provided on the internal cover 820 to press the second end of the internal cover 820 onto the flange 400. That is, when the bolt coupling units 875 are tightened, the second inside assistant rings 855 evenly press the edge of the second end of the internal cover 820 onto the extension part 860 of the flange 400, thus ensuring airtightness between the internal cover 820 and the extension part 860 of the flange 400.
  • the wheel 200 While the railway vehicle travels between the broad- gauge rails 20 and the standard-gauge rails 10, the wheel 200 is moved in a lateral direction corresponding to gauge conversion, therefore the volumes of the external space 880 and the internal space 890 change .
  • the air vent holes 830a and 830b provide passages that allow air to move therethrough between the external space 880 and the internal space 890, thus preventing the external cover 800 or the internal cover 820 from being damaged by changes in volume of the external space 880 or the internal space 890.
  • the gauge-adjustable wheelset according to the third embodiment of the present invention includes the external cover 800, which is provided on the outer surface of the wheel 200, and the internal cover 820 , which is provided on the inner surface of the wheel 200 , thereby reliably protecting the elements of the gauge-adjustable wheelset from the surroundings without affecting the parts thereof .
  • the present invention provides a gauge-adjustable wheelset for a railway vehicle which automatically changes a gauge thereof such that the railway vehicle is able to travel between two kinds of railways having different gauges, and which includes : an axle, having a sliding part and a cap mounting part ; a wheel fitted over the sliding part of the axle so as to be movable in a left or right direction; a support cap securely fitted over the cap mounting part of the axle; a locking block rotatably fitted over the support cap, so that left and right movement of the wheel is controlled by circumferential rotation of the locking block; a flange coupled to a right end of the support cap to control a locking and unlocking operation of the locking block; a spring holder coupled to a left end of the support cap; and a compression spring provided between the flange and the spring holder, thus reducing the number of elements and the manufacturing costs, being easily mounted to a bogie thanks to structural features thereof, and having an advantage of saving energy thanks to reduced rotational inertia
  • the present invention provides a gauge- adjustable wheelset for a railway vehicle which simply realizes a gauge-adjustable system and has a structure such that elements thereof are easily assembled or disassembled.
  • the present invention provides gauge- adjustable wheelsets for railway vehicles and, more particularly, provides a gauge-adjustable wheelset for a railway vehicle which automatically changes the distance between opposite wheels such that the railway vehicle is able to travel on railways having different gauges, and which prevents locking elements from being contaminated by water, dust or filth, thus ensuring the smooth operation and superior performance of the wheelset .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Machines For Laying And Maintaining Railways (AREA)

Abstract

L'invention porte sur un ensemble roue à calibre réglable pour véhicules de chemin de fer. Cet ensemble roue à calibre réglable change automatiquement de calibre de sorte que le véhicule chemin de fer se déplace entre deux types de voies ferrées possédant des calibres différents. Cet ensemble roue à calibre réglable comprend un essieu (100) comportant une pièce coulissante (110) sur laquelle est placée une pièce de fixation de manchon (120), une roue (200) montée amovible sur la pièce coulissante (110) et un manchon de support (300) fixé solidement sur la pièce de fixation (120). L'ensemble roue à calibre réglable comprend également un bloc de verrouillage (500) monté rotatif sur le manchon de support (300) de sorte que le mouvement latéral de la roue soit commandé par la rotation du bloc de verrouillage (500), et une bride (400) qui commande le verrouillage ou le déverrouillage du bloc (500). L'ensemble roue à calibre réglable comprend en outre un dispositif de retenue (700) de ressort et un ressort de compression (600) ménagé entre la bride (400) et le dispositif de retenue (700) du ressort.
PCT/KR2005/004522 2005-01-27 2005-12-26 Ensemble roue a modification de calibre pour vehicule de chemin de fer WO2006080774A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
KR10-2005-0007360 2005-01-27
KR1020050007360A KR100614613B1 (ko) 2005-01-27 2005-01-27 자동 궤간변환 윤축시스템
KR1020050042281A KR100599047B1 (ko) 2005-05-20 2005-05-20 궤간 가변 윤축시스템
KR10-2005-0042281 2005-05-20
KR10-2005-0121519 2005-12-12
KR1020050121519A KR100708485B1 (ko) 2005-12-12 2005-12-12 철도차량용 궤간 가변 장치 덮개

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WO2006080774A1 true WO2006080774A1 (fr) 2006-08-03

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CN106740964A (zh) * 2016-12-07 2017-05-31 中车株洲电力机车有限公司 一种变轨距轮对及其锁紧机构
CN107187461A (zh) * 2017-05-24 2017-09-22 西南交通大学 一种钓竿式可变轨距锁紧机构
CN108407840A (zh) * 2018-04-13 2018-08-17 中车青岛四方机车车辆股份有限公司 一种用于变轨距转向架的地面变轨设施
CN108680372A (zh) * 2018-07-23 2018-10-19 吉林大学 驱动式变轨距轮对变轨性能及可靠性试验台
WO2020007074A1 (fr) * 2018-07-05 2020-01-09 中车青岛四方机车车辆股份有限公司 Train de roues pour train à écartement variable
WO2020077690A1 (fr) * 2018-10-19 2020-04-23 中车唐山机车车辆有限公司 Essieu monté, bogie et véhicule ferroviaire
CN111071279A (zh) * 2018-10-19 2020-04-28 中车唐山机车车辆有限公司 转向架及轨道车辆
CN111361576A (zh) * 2020-04-30 2020-07-03 株洲时代电子技术有限公司 一种轨道巡检小车、系统及其上下道方法

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JPH10217961A (ja) * 1997-02-10 1998-08-18 Sumitomo Metal Ind Ltd 鉄道車両用軌間可変台車の軌間変更装置

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JPH08282489A (ja) * 1995-04-11 1996-10-29 Kawasaki Heavy Ind Ltd 回転継手構造および可変ゲージ台車用輪軸
JPH08332950A (ja) * 1995-06-06 1996-12-17 Nippon Tetsudo Kensetsu Kodan 鉄道車両の軌間可変台車
JPH0930223A (ja) * 1995-07-21 1997-02-04 Niigata Kobelco Kenki Kk 軌道用作業機
US5787814A (en) * 1996-04-17 1998-08-04 Patentes Talgo, S.A. Railway axle assembly furnished with automatic change of track gauge and adaptable to conventional freight bogies
JPH10217961A (ja) * 1997-02-10 1998-08-18 Sumitomo Metal Ind Ltd 鉄道車両用軌間可変台車の軌間変更装置

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106740964A (zh) * 2016-12-07 2017-05-31 中车株洲电力机车有限公司 一种变轨距轮对及其锁紧机构
CN107187461A (zh) * 2017-05-24 2017-09-22 西南交通大学 一种钓竿式可变轨距锁紧机构
CN108407840A (zh) * 2018-04-13 2018-08-17 中车青岛四方机车车辆股份有限公司 一种用于变轨距转向架的地面变轨设施
CN108407840B (zh) * 2018-04-13 2020-01-10 中车青岛四方机车车辆股份有限公司 一种用于变轨距转向架的地面变轨设施
WO2020007074A1 (fr) * 2018-07-05 2020-01-09 中车青岛四方机车车辆股份有限公司 Train de roues pour train à écartement variable
CN108680372A (zh) * 2018-07-23 2018-10-19 吉林大学 驱动式变轨距轮对变轨性能及可靠性试验台
CN108680372B (zh) * 2018-07-23 2023-09-15 吉林大学 驱动式变轨距轮对变轨性能及可靠性试验台
WO2020077690A1 (fr) * 2018-10-19 2020-04-23 中车唐山机车车辆有限公司 Essieu monté, bogie et véhicule ferroviaire
CN111071279A (zh) * 2018-10-19 2020-04-28 中车唐山机车车辆有限公司 转向架及轨道车辆
CN111071279B (zh) * 2018-10-19 2021-02-02 中车唐山机车车辆有限公司 转向架及轨道车辆
CN111361576A (zh) * 2020-04-30 2020-07-03 株洲时代电子技术有限公司 一种轨道巡检小车、系统及其上下道方法
CN111361576B (zh) * 2020-04-30 2024-05-28 株洲时代电子技术有限公司 一种轨道巡检小车、系统及其上下道方法

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