CN202439710U - Bearing wheel of railway heavy-duty truck vehicle and bogie thereof - Google Patents
Bearing wheel of railway heavy-duty truck vehicle and bogie thereof Download PDFInfo
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- CN202439710U CN202439710U CN2012200694324U CN201220069432U CN202439710U CN 202439710 U CN202439710 U CN 202439710U CN 2012200694324 U CN2012200694324 U CN 2012200694324U CN 201220069432 U CN201220069432 U CN 201220069432U CN 202439710 U CN202439710 U CN 202439710U
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Abstract
The utility model relates to a bearing wheel and a bogie, in particular to a bearing wheel and a bogie thereof, which are suitable for a railway heavy-duty truck vehicle, can reduce the loss and unsprung weight, can reduce the operation cost, can improve the running quality and can greatly improve the carrying capacity. The bogie comprises a central crossbeam, side frames which are symmetrically connected to two ends of the central crossbeam and a wheel pair which are symmetrically arranged on two ends of the side frame through a wheel pair shaft, and the bogie is characterized also comprising at least one pair of bearing wheels which are arranged between the wheel pair; each bearing wheel is arranged on the side frame and comprises an integrated wheel rim, a wheel disk and a wheel hub; the outer surface of the wheel rim is not provided with a flange, the working surface of the wheel rim is horizontally arranged in the axial direction, and the width is more than 115mm. The bearing wheel and the bogie have beneficial effects that the loading capacity of the bogie can be greatly increased, the wheel-track contact stress can be reduced, the wheel-track abrasion can be reduced, the running quality can be improved, the operation cost can be reduced, the structure is simple, the production difficulty is low, and the cost is low.
Description
Technical field
The utility model relates to a kind of caterpillar wheel and bogie truck, is specially the caterpillar wheel and the bogie truck thereof of Heavy-Haul Railway truck vehicle.
Background technology
Improve railway transport capacity, except level of management, speed-raising, two technological means that are absolutely necessary of heavy duty.In China, the train running speed aspect has obtained significant achievement, passenger area especially, and the shipping aspect has also obtained very big progress, but also has a lot of needs of work to do.At present, the heavy 23t that also brought up to of the axle of China railways lorry, fortune coal special train has reached 25t.Except large-tonnage pincers type car, outside the special vehiclees such as depressed center flat car, the load of the general every joint vehicle of load carrying vehicle all is to be born by two two axle trucks; If this bogie truck improves carrying capacity; Reach heavily loaded requirement, or increase the number of axle of bogie truck, form multi axle truck; Be to increase the right bearing capacity of wheel, and it is heavy to increase axle.
Except that Russia, various countries railway interests also all is to have concentrated on to increase axle double recipe face to heavily stressed research.It is heavy to increase axle, no doubt can improve transport capacity, but the destructive force of rail and roadbed in running mechanism of train portion and the railway is also strengthened thereupon, also higher to the technical requirements of key components such as rail, roadbed, wheel, wheel shaft simultaneously, harsher.The increase of the stress value that wheel contacts with rail; Can cause the plastic flow of surface metal-layer; Cause fatigue of material, light contact-type facial disfigurement then, heavy then surface layer peeling; Subsurface produces line and splits, do not have better wheel track material not damage at present yet or few damage withstand the long-term intense impact of heavy axle load wagon.Simultaneously, propagation and the diffusion of vertical force in the sub rail foundation structure of the heavy vehicle of macro-axis also plays very big damage effect to the technology status of circuit.Therefore along with the increase of axle weight and the lifting of the speed of a motor vehicle, the impulsive force between the wheel track can be more violent.Especially on curve motion, it is more serious to take turns the inboard wearing and tearing of the right wheel rim outside and rail, wheel track work type surface technology state is reduced, even threaten traffic safety.Maintenance cost increased when railway was normally moved.The maintenance of railway is a system engineering, not only need drop into great amount of manpower, financial resources and time cost, and to influence the transportation control of whole circuit so that the needed effect of out of reach heavy haul transport.Simultaneously heavy to list the car stopping distance long for macro-axis, and longitudinal impact force is big, and the train joint number is many, and total length is big, and station and the length etc. of dodging line all are still unresolved good problems in the heavy haul transport.
Traditional multi axle truck; Also can significantly improve load capacity though take turns bogie truck, disperse wheel Rail Contact Stresses, must set up the contact beam as four eight; Two cover bogie trucks are connected into a framework; Thereby the center-point that sidewinders must raise, and be unfavorable for entrucking, unload and and the combination of auxiliary facility such as station equipment condition use, also cause difficulty to connecting other vehicles and locomotive; Himself complex structure of simultaneously traditional multi axle truck, manufacturing cost is high, and the deadweight quality is big, and can not effectively reduce unsprung weight, improves riding quality, so it is not that the ideal that solves heavy haul transport is selected.
Summary of the invention
The purpose of the utility model is to provide a kind of Heavy-Haul Railway truck vehicle that is applicable to, can reduce loss and unsprung weight, can cut operating costs, and improves riding quality, significantly improves the caterpillar wheel and the bogie truck thereof of the Heavy-Haul Railway truck vehicle of carrying capacity.
For achieving the above object, the caterpillar wheel of a kind of Heavy-Haul Railway truck vehicle of the utility model is characterized in that, described caterpillar wheel comprises wheel rim, disc and the wheel hub of integral type; On the outer wheel face of described wheel rim wheel rim is not set, driving surface is axial level, and its width is greater than 115mm.
For achieving the above object; The bogie truck of a kind of Heavy-Haul Railway truck vehicle of the utility model; Comprise the center crossbeam, symmetry is connected the bogie side frame at crossbeam two ends, center, and right to the wheel that rotational symmetry is arranged on the bogie side frame two ends through wheel; It is characterized in that, also comprise at least one pair of the wheel between caterpillar wheel; Caterpillar wheel is arranged on the bogie side frame, comprises wheel rim, disc and the wheel hub of integral type; On the outer wheel face of wheel rim wheel rim is not set, driving surface is axial level, and its width is greater than 115mm.
Further, described bogie truck also comprises the brake equipment that corresponding caterpillar wheel is provided with; Brake equipment comprises that width equates with caterpillar wheel, and tread is the brake block of axial level.
Further, described bogie side frame comprises outer bogie side frame and interior bogie side frame; Outer bogie side frame inboard is respectively arranged with interior bogie side frame; Separate with outer bogie side frame at interior bogie side frame middle part, captives joint with cooresponding outer bogie side frame respectively in two ends; Interior bogie side frame is parallel with outer bogie side frame with the middle part of outer bogie side frame separating part.
Further, described interior bogie side frame is provided with the bogie side frame deep beam with the parallel center of outer bogie side frame separating part crossbeam.
Further, described caterpillar wheel also comprises corresponding bonded assembly caterpillar wheel wheel shaft with wheel hub; The axial length of caterpillar wheel wheel shaft is 740-780mm, and two ends are respectively through bearing and caterpillar wheel axle box and comprise adapter and the suspension gear of spring is connected with interior bogie side frame with cooresponding outer bogie side frame.
Further, described caterpillar wheel carries out the position qualification of horizontal direction through the guide groove of corresponding setting on the fixing drawing strickle guide slide rail in bogie side frame below and the adapter.
Further, described wheel shaft is captiveed joint with wheel hub through integrated or interference fit, forms mandrel.
Further, described wheel shaft is rotationally connected through bearing and wheel hub, forms stationary spindle.
Further again, be provided with the rubber vivroinsulator circle between described caterpillar wheel axle box and the suspension gear.
The beneficial effect of the utility model is described below:
1) compare Heavy-Haul Railway truck vehicle wheel, the no wheel rim design of the uniqueness that caterpillar wheel adopts, different with the wheel of all goods train vehicles; Having removed the function of wheel guiding, mainly is to be used for load capacity, under wheel ability bearing load unmodified situation; Be specifically designed to the increase of the caterpillar wheel of load-carrying, will inevitably significantly improve the load carrying ability of bogie truck, the caterpillar wheel of no wheel rim is guaranteeing that wheel to guiding simultaneously flexibly; Also improved the load carrying ability of the every linear meter(lin.m.) of vehicle, it is strong to make full use of the anti-vertical force of rail, the characteristic that lateral force resistance is weak; When strengthening carrying, no wheel rim then can not produce the destructive force of wheel rim to track to track.
2) caterpillar wheel tread width is wideer than the wheel tread of existing standard, has guaranteed vehicle caterpillar wheel effective lift-launch amount on rail level when turning; The caterpillar wheel driving surface is axial level; The track area of contact of itself and surperficial camber is little, is spot with track and contacts, and can not form the multiple spot contact and produce the cunning of vertically wriggling; And only be the very little friction of rolling of friction force; Straight line still is the extruding that curve can not cause side direction to track simultaneously, in load-carrying, has reduced the wearing and tearing of wheel track.
3) bogie truck wheel between set up no wheel rim caterpillar wheel, only need the length of former bogie truck is extended, and can not improve center-point; Not only improved the single-piece load carrying ability, and solved with the supporting problem of existing equipment, simple in structure; Manufacture difficulty is low, and cost is low.
4) be provided with the bogie truck of caterpillar wheel, when contacting with track, increase the contact, and it is big to carry out the glancing impact binding force, cooperates the brake equipment of corresponding setting with caterpillar wheel simultaneously, has increased brake area, has shortened the stopping distance of heavy-duty freight car; And the caterpillar wheel face area is big, helps receiving the braking heat capacity and increases radiating effect, improves the ability that wheel body bears thermal load.
5) the caterpillar wheel wheel shaft adopts the minor axis design to be connected respectively with outer bogie side frame, interior bogie side frame, and caterpillar wheel wheel shaft two ends are respectively arranged with caterpillar wheel axle box and suspension gear, can accept the load that bogie side frame bears uniformly; And alleviated the load of wheel to suspension gear; Just can adjust and set respectively caterpillar wheel and the right suspension stiffness of wheel thus, and possess the condition that between caterpillar wheel axle box and suspension gear, installs the rubber vivroinsulator circle additional, when guaranteeing load-carrying; Can absorbed oscillation as much as possible; Alleviate unsprung weight, reduce and impact, improved the stability and the curve negotiation ability of bogie truck.
6) be provided with the bogie truck of caterpillar wheel, because identical weight is shared by a plurality of wheels, the load that each wheel bears reduces greatly; Be not only the stress point that has increased between the wheel track, reduced the unit contact stress, and through changing bogie truck overall architecture form; Bogie side frame is made up of interior bogie side frame and outer bogie side frame, and is strengthened by the bogie side frame deep beam, and each caterpillar wheel both sides all is provided with suspension gear; Share stressedly, reduced degree of fatigue, prolonged service life; Reduced maintenance and maintenance cost, practiced thrift time, human and material resources and financial resources, economic benefit is obvious.
7) dispose the vehicle of the bogie truck that caterpillar wheel is set; On each bar standard railroad circuit that existing rail head width 70mm, 73mm, 75mm and quality do not wait, can both implement heavy haul transport; Comformability is good, and promotional value is high, meets China and should improve transport capacity at present; Can not improve all line tower foundation conditions at short notice again, the expansion under this national conditions can be transported.
Description of drawings
Fig. 1 partly cuts open structural representation according to the caterpillar wheel of a kind of Heavy-Haul Railway truck vehicle of the utility model preferred embodiment and the side-looking of bogie truck thereof
Fig. 2 is the birds-eye view of Fig. 1
Fig. 3 partly cuts open structural representation for facing of Fig. 1
Among the figure: caterpillar wheel 1, wheel rim 11, disc 12, wheel hub 13, caterpillar wheel wheel shaft 14; Bogie truck 2, center crossbeam 21, bogie side frame 22, outer bogie side frame 221, interior bogie side frame 222; Wheel is to 23, brake equipment 24, brake block 241, bogie side frame deep beam 25, caterpillar wheel axle box 26; Spring 27, adapter 28, drawing strickle guide slide rail 281, rubber vivroinsulator circle 29
The specific embodiment
Below will caterpillar wheel and bogie truck thereof according to a kind of Heavy-Haul Railway truck vehicle of the utility model preferred embodiment be described with reference to relevant drawings, wherein identical component will be explained with identical Reference numeral.
With reference to shown in Figure 1; The bogie truck 2 of a kind of Heavy-Haul Railway truck vehicle of the utility model preferred embodiment comprises center crossbeam 21, and symmetry is connected the bogie side frame 22 at center crossbeam 21 two ends; And the wheel that rotational symmetry is arranged on the bogie side frame two ends through wheel is to 23; Also comprise at least one pair of caterpillar wheel 1 between wheel is to 23, caterpillar wheel 1 is arranged on the bogie side frame 23, and caterpillar wheel 1 is described below.
With reference to Fig. 2, shown in Figure 3, caterpillar wheel 1 comprises wheel rim 11, disc 12 and the wheel hub 13 of integral type simultaneously; On the outer wheel face of wheel rim 11 wheel rim is not set, driving surface is axial level, and its width is greater than 115mm; Disc 12 can be processed S shape, deep dish or straight plate shape.
This instance is provided with two pairs of caterpillar wheels 1 with bogie truck 2, wheel rim 11 width 140mm, and it is example that disc 12 is deep dish, but is not limited thereto.
Bogie truck 2 also is provided with the brake equipment 24 that corresponding caterpillar wheel 1 is provided with; Brake equipment 24 comprises what width equated with caterpillar wheel 1, and tread is the brake block 241 of axial level.
Bogie side frame 22 comprises outer bogie side frame 221 and interior bogie side frame 222; Outer bogie side frame 221 inboards are respectively arranged with interior bogie side frame 222; Separate with outer bogie side frame 221 at interior bogie side frame 222 middle parts, captives joint with cooresponding outer bogie side frame 221 respectively in two ends; The middle part of interior bogie side frame 222 and outer bogie side frame 221 separating parts is parallel with outer bogie side frame 222; Make bogie side frame 22 inwardly extending transversely, increased loaded area, carried weight uniformly.
Interior bogie side frame 221 and outer bogie side frame 222 separating parts are parallel to center crossbeam 21 and are provided with bogie side frame deep beam 25; Bogie side frame deep beam 25 is fixedly connected on the bogie side frame 22, is used for additional strengthening intensity, improves the anti-water chestnut ability of framework, and prevents horizontal deformation, helps installing additional other attendant equipments simultaneously.
Caterpillar wheel 1 also comprises and wheel hub 13 corresponding bonded assembly caterpillar wheel wheel shafts 14; The axial length of caterpillar wheel wheel shaft 14 is 740-780mm, with respect to wheel to 23 wheel to axle, it is minor axis independently, and is unaffected each other, and two ends are connected with interior bogie side frame 222 with cooresponding outer bogie side frame 221 respectively; Caterpillar wheel wheel shaft 14 can form mandrel through the captiveing joint with wheel hub 13 of integrated or interference fit; Can also be rotationally connected through bearing and wheel hub 13, form stationary spindle; Caterpillar wheel wheel shaft 14 can be made into hollow shaft or solid axle, and this instance is an example with solid mandrel.
Caterpillar wheel wheel shaft 14 two ends are respectively through bearing and caterpillar wheel axle box 26 and comprise spring 27 and the suspension gear of adapter 28 is connected with interior bogie side frame 222 with cooresponding outer bogie side frame 221; Be used to carry lorry weight, because the setting of its independent minor axis makes each caterpillar wheel 1 both sides all be provided with suspension gear; Spring 27 quantity have been increased; Effectively raise the every linear meter(lin.m.) load carrying ability of vehicle, and stressed even, more more stable than wheel to 23 suspension gears through the outside.
Be provided with rubber vivroinsulator circle 29 between caterpillar wheel axle box 26 and the suspension gear, alleviated the unsprung weight of caterpillar wheel 1, improve the riding quality of train, make its operation more steady, impact littler.
Caterpillar wheel axle box 26 carries out the position qualification of horizontal direction through the guide groove of corresponding setting on the fixing drawing strickle guide slide rail 281 in bogie side frame 22 belows and the adapter 28; Make caterpillar wheel axle box 26 to move in vertical direction, can not produce in the horizontal direction and move and rotate.The wheel that is provided with on the bogie truck 2 then adopts prior art that it is positioned to 23 axle box, and it can be moved at vertical and horizontal, also can move in vertical direction, guarantees its guidance capability.
In sum; Because of caterpillar wheel and bogie truck thereof, through two pairs of independently caterpillar wheel 1, both four separate caterpillar wheels 1 separately are set between the wheel of bogie truck 2 is to 23 according to the Heavy-Haul Railway truck vehicle of the utility model; Sharing each takes turns the load on 23; Simple in structure, manufacture difficulty is little, and is with low cost; Do not have the caterpillar wheel 1 of wheel rim and driving surface level to reduce friction and impact simultaneously yet, reduced maintenance workload and cost greatly wheel track; Also can alleviate the rigidity of wheel, improve the curve negotiation ability of bogie truck 2, improve safety factor the pendulum spring that is provided with on 23; Because sharing of 1 pair of load of caterpillar wheel, situation about heavily reducing at axle also can significantly improve lorry carrying capacity, has reduced the vehicle joint number, thereby has reduced coupler slack, and actv. has reduced longitudinal impact; And because each wheel comprises that wheel is less with caterpillar wheel 1 apportioned load to 23, so low to equipment and material requirements, wide adaptability has very high market popularization value.
From following under the isodose load-up condition; Described two bogie truck and other the two kinds of general-duty heavy duty bogie trucks that add four caterpillar wheels of the utility model preferred embodiments have in the related parameter contrast table of (not comprising locomotive parameters) (table one and table two); Can find out the above-mentioned advantage that caterpillar wheel and bogie truck thereof had of the described Heavy-Haul Railway truck vehicle of the utility model, and great advantage.
Table one:
| Car type | C64 type universal gondola car | The extended type universal gondola car | Difference |
| The bogie truck pattern | Change the K2 type | Two add four caterpillar wheel bogie trucks | |
| Vehicle load (t) | 61 | ?120 | 59 |
| Dead weight of vehicle (t) | 22.9 | ?38 | 15.1 |
| Axle heavy (t) | 21 | Take turns right＜20; Caterpillar wheel: 11 * 2 | |
| Length between truck centers (mm) | 8700 | ?11000 | 2300 |
| Length (mm) in the car | 12490 | ?16000 | 3510 |
| Vehicle length (mm) | 13438 | ?16938 | 3500 |
| Permutation vehicle-mounted heavy (t) | 5002 | ?5040 | 38 |
| Required vehicle number () | 82 | ?42 | -40 |
| Permutation empty wagons total mass (t) | 1877.8 | ?1596 | -281.8 |
| Permutation loaded vehicle total mass (t) | 6879.8 | ?6636 | -243.8 |
| With reference to hitch/gap (mm) | 13A/12 | ?13A/12 | |
| Permutation car hitch sum (individual) | 164 | ?84 | -80 |
| Permutation car hitch total backlash (mm) | 1968 | ?1008 | -960 |
| Permutation car wheel sum (individual) | 656 | ?672 | 16 |
| Each wheel average load (t) | 10.4875 | ?9.875 | -0.6125 |
| Permutation car total length (m) | 1101.916 | ?711.396 | -390.52 |
Annotate: calculate like need, the locomotive overall length of heavy-duty freight car gets: 22m * 2
Table two:
| Car type | C76 type universal gondola car | The extended type universal gondola car | Difference |
| The bogie truck pattern | Low power truck | Two add four caterpillar wheel bogie trucks | |
| Vehicle load (t) | ?76 | ?120 | 44 |
| Dead weight of vehicle (t) | ?24 | ?38 | 14 |
| Axle heavy (t) | ?25 | Take turns right＜20 caterpillar wheels: 11 * 2 | |
| Length between truck centers (mm) | ?8200 | ?11000 | 2800 |
| Length (mm) in the car | ?11067 | ?16000 | 4933 |
| Vehicle length (mm) | ?12005 | ?16938 | 4933 |
| Permutation vehicle-mounted heavy (t) | ?6004 | ?6000 | -4 |
| Required vehicle number () | ?79 | ?50 | -29 |
| Permutation empty wagons total mass (t) | ?1896 | ?1900 | 4 |
| Permutation loaded vehicle total mass (t) | ?7900 | ?7900 | 0 |
| With reference to hitch/gap (mm) | ?13A/12 | ?13A/12 | |
| Permutation car hitch sum (individual) | ?158 | ?100 | -58 |
| Permutation car hitch total backlash (mm) | ?1896 | ?1200 | -696 |
| Permutation car wheel sum (individual) | ?632 | ?800 | 168 |
| Each wheel average load (t) | ?12.5 | ?9.875 | -2.625 |
| Permutation car total length (m) | ?948.395 | ?846.900 | -101.495 |
Annotate: calculate like need, the locomotive overall length of heavy-duty freight car gets: 22m * 2
Claims (9)
1. the caterpillar wheel of Heavy-Haul Railway truck vehicle is characterized in that, described caterpillar wheel comprises wheel rim, disc and the wheel hub of integral type; On the outer wheel face of described wheel rim wheel rim is not set, driving surface is axial level, and its width is greater than 115mm.
2. the bogie truck of Heavy-Haul Railway truck vehicle comprises the center crossbeam, and symmetry is connected the bogie side frame at crossbeam two ends, center, and it is right through wheel rotational symmetry to be arranged on the wheel at bogie side frame two ends, it is characterized in that, also comprise at least one pair of wheel between caterpillar wheel; Caterpillar wheel is arranged on the bogie side frame, comprises wheel rim, disc and the wheel hub of integral type; On the outer wheel face of wheel rim wheel rim is not set, driving surface is axial level, and its width is greater than 115mm.
3. the bogie truck of Heavy-Haul Railway truck vehicle as claimed in claim 2 is characterized in that, described bogie truck also comprises the brake equipment that corresponding caterpillar wheel is provided with; Brake equipment comprises that width equates with caterpillar wheel, and tread is the brake block of axial level.
4. the bogie truck of Heavy-Haul Railway truck vehicle as claimed in claim 2 is characterized in that, described bogie side frame comprises outer bogie side frame and interior bogie side frame; Outer bogie side frame inboard is respectively arranged with interior bogie side frame; Separate with outer bogie side frame at interior bogie side frame middle part, captives joint with cooresponding outer bogie side frame respectively in two ends; Interior bogie side frame is parallel with outer bogie side frame with the middle part of outer bogie side frame separating part.
5. the bogie truck of Heavy-Haul Railway truck vehicle as claimed in claim 4 is characterized in that, described interior bogie side frame is parallel to the center crossbeam with outer bogie side frame separating part and is provided with the bogie side frame deep beam.
6. the bogie truck of Heavy-Haul Railway truck vehicle as claimed in claim 4 is characterized in that, described caterpillar wheel also comprises corresponding bonded assembly caterpillar wheel wheel shaft with wheel hub; The axial length of caterpillar wheel wheel shaft is 740-780mm, and two ends are respectively through bearing and caterpillar wheel axle box and comprise adapter and the suspension gear of spring is connected with interior bogie side frame with cooresponding outer bogie side frame.
7. the bogie truck of Heavy-Haul Railway truck vehicle as claimed in claim 6 is characterized in that, described caterpillar wheel axle box carries out the position qualification of horizontal direction through the guide groove of corresponding setting on the fixing drawing strickle guide slide rail in bogie side frame below and the adapter.
8. the bogie truck of Heavy-Haul Railway truck vehicle as claimed in claim 6 is characterized in that, described caterpillar wheel wheel shaft is captiveed joint with wheel hub through integrated or interference fit, forms mandrel.
9. the bogie truck of Heavy-Haul Railway truck vehicle as claimed in claim 6 is characterized in that, described caterpillar wheel wheel shaft is rotationally connected through bearing and wheel hub, forms stationary spindle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200694324U CN202439710U (en) | 2012-02-29 | 2012-02-29 | Bearing wheel of railway heavy-duty truck vehicle and bogie thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200694324U CN202439710U (en) | 2012-02-29 | 2012-02-29 | Bearing wheel of railway heavy-duty truck vehicle and bogie thereof |
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| Publication Number | Publication Date |
|---|---|
| CN202439710U true CN202439710U (en) | 2012-09-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200694324U Expired - Fee Related CN202439710U (en) | 2012-02-29 | 2012-02-29 | Bearing wheel of railway heavy-duty truck vehicle and bogie thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102530007A (en) * | 2012-02-29 | 2012-07-04 | 张二群 | Thrust wheel for heavy-duty railway wagons and bogie thereof |
-
2012
- 2012-02-29 CN CN2012200694324U patent/CN202439710U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102530007A (en) * | 2012-02-29 | 2012-07-04 | 张二群 | Thrust wheel for heavy-duty railway wagons and bogie thereof |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120919 Termination date: 20150229 |
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| EXPY | Termination of patent right or utility model |