CN209719586U - A kind of railway freight-car movable grounding device - Google Patents
A kind of railway freight-car movable grounding device Download PDFInfo
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- CN209719586U CN209719586U CN201920584842.4U CN201920584842U CN209719586U CN 209719586 U CN209719586 U CN 209719586U CN 201920584842 U CN201920584842 U CN 201920584842U CN 209719586 U CN209719586 U CN 209719586U
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- 238000007789 sealing Methods 0.000 claims description 6
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Abstract
The utility model discloses a kind of railway freight-car movable grounding devices, it is formed including trolley, pull rod composition, traction mechanism and earth lead, the trolley composition is placed on rail and can move along rail, the traction mechanism is mounted on railway freight-car, pull rod composition both ends are hinged with trolley composition and traction mechanism respectively, form the rigid force transferring structure with rotational freedom, it is made up of and runs traction mechanism trailer wagon, and stop trolley component movement when railway wagon brake slows down, and the relative displacement between adaptive traction mechanism and trolley composition changes, the railway freight-car for being loaded with generating equipment is connected by earth lead and trolley composition, it is set to be formed together the earthed circuit that dynamic is connected to rail.The utility model solves the railway freight-car movable type problem with grounding for being loaded with generating equipment, it is excessively electric to effectively prevent freight car bearing, damage the risk of bearing, and safeguard work human life's safety, safety ground when can meet the railway freight-car operation power supply for being loaded with generating equipment.
Description
Technical field
The utility model belongs to railway freight-car transporting technical field, is grounded and fills more particularly to a kind of railway freight-car movable type
It sets.
Background technique
Currently, being increasing with the development of railway freight-car industry to the functional requirement of lorry, in addition to cargo transport, also
It needs to develop collection to speedily carry out rescue work, rescue, generate electricity, supply water, rinse the railway combined service truck that the functions such as tunnel are integrated.For this kind of iron
Road synthetic safeguard vehicle is generally provided with Independent Power Generation equipment on vehicle, and the electricity that generator is issued is forceful electric power, when lorry exists
When needing to generate electricity in moving process, in order to protect the life security of staff, it is necessary to it is connected to ground connection with track dynamic, and China
Existing railway truck bearing does not allow otherwise to damage bearing by forceful electric power, jeopardize traffic safety.Do not changing existing goods
It under conditions of vehicle technical pattern, to allow lorry to generate electricity when walking, must just increase a kind of earthing or grounding means that can be moved on rail,
To ensure lorry and personnel safety.
There are the resilient load-bearing elements such as spring on existing roller bearing adapter stabilizer bar, when truckload variation, wheel wear and route
The factors such as vibration caused by irregularity will cause the height of car body, hitch away from rail level and corresponding change occur.In addition, passing through curve
When, coupler centre line meeting offset track center, sweep is smaller, and hitch offset track center line is remoter.Therefore, lorry is run
When, no matter also it is horizontally oriented in vertical direction, car body, hitch be not fixed relative to the position of track, one
Determine to change at random in range, in this case, how to guarantee that the traction of lorry and earthing or grounding means, connection are also in need of consideration
Problem.
Utility model content
The goal of the invention of the utility model is, in view of the above problems, provides one kind and can be realized and be mounted with hair
Safe power supply when the railway freight-car operation of electric equipment, and avoid bogie bearing excessively electric, damage bearing, while safeguard work personnel
The railway freight-car movable grounding device of life security.
The utility model adopts the following technical solution realizes: a kind of railway freight-car movable grounding device, it is characterised in that:
Including trolley composition, pull rod composition, traction mechanism and earth lead, the trolley composition is placed on rail and can be along rail
Mobile, the traction mechanism is mounted on railway freight-car, and pull rod composition both ends are cut with scissors with trolley composition and traction mechanism respectively
It connects, forms the rigid force transferring structure with rotational freedom, be made up of and run traction mechanism trailer wagon, and in railway freight-car
Stop trolley component movement when braking deceleration, and the relative displacement between adaptive traction mechanism and trolley composition changes, and is loaded with hair
The railway freight-car of electric equipment is connected by earth lead and trolley composition, it is made to be formed together the ground connection electricity that dynamic is connected to rail
Road.
Railway freight-car movable grounding device described in the utility model, the trolley composition is by least one set wheel to group
At, when the wheel is to being multiple groups, the structure of every group of wheel pair is identical and two adjacent groups wheel pair between by connecting plate rigid connection,
Described earth lead one end is connect with connecting plate, and every group of wheel is to including axle and be symmetricly set on the wheel at axle both ends
Seat is connected with connecting plate on the axle, and the wheel mount is rotatablely connected by bearing assembly and axle, and the wheel mount is put
It sets the lateral distance on rail and between the wheel mount of axle both ends to match with the gauge of railroad track, close to traction mechanism
It is fixedly connected with fixed plate in the middle part of the axle of one group of wheel pair, it is hinged with fixed plate that the pull rod forms one end.
Railway freight-car movable grounding device described in the utility model, the bearing assembly are arranged in wheel mount,
The bearing assembly is made of bearing and bearing cap, and the bearing and wheel mount are using interference fit, the bearing cap and wheel
Seat is bolted, and at runtime, wheel mount scroll forward and backward on rail, the axle is relative to flat before and after rail
It is dynamic.
Railway freight-car movable grounding device described in the utility model, the pull rod composition is including pull rod and symmetrically
The ear mount at pull rod both ends is set, the ear mount is concave, be provided in the ear mount at the pull rod both ends be parallel to each other and with
The axial perpendicular pin hole of pull rod, is provided with pin shaft in the pin hole.
Railway freight-car movable grounding device described in the utility model, the ear mount are fixedly connected with tie rod end,
In the groove for the ear mount that fixed plate in the trolley composition is placed in pull rod one end, and it is hinged by pin shaft, the traction
In the groove for the ear mount that the otic placode of mechanism lower part setting is placed in the pull rod other end, and it is hinged by pin shaft, the pull rod two
After the ear mount at end is connect with fixed plate and otic placode, horizontally there are enough gaps to adapt to railway freight-car song in orbit
Line movement.
Railway freight-car movable grounding device described in the utility model, the traction mechanism are mounted on railway freight-car
Between striker and end carriage, the traction mechanism is integrally in frame structure, and limit plate is provided on the traction mechanism, described
The left and right ends of traction mechanism are contacted with end carriage, and are stuck in striker both ends, and the limit plate on the traction mechanism hooks end carriage
Lower flange.
Railway freight-car movable grounding device described in the utility model, the traction mechanism include upper beam composition,
Lower beam composition and left and right column composition, upper and lower crossbeam composition are connected by screw to form fixation with left and right column composition
Frame structure, the limit plate are symmetrically fixed on left and right column composition.
Railway freight-car movable grounding device described in the utility model, upper beam composition include upper beam and upper
Cross-beam connecting plate, the upper beam both ends are fixedly connected with upper beam connecting plate, the upper beam connecting plate by screw and it is left,
Right column composition is fixedly connected, plane contact on the striker of the upper beam composition lower plane and railway freight-car, the upper cross
The length of beam composition and the outer dimension of striker match.
Railway freight-car movable grounding device described in the utility model, the lower beam composition include lower beam, envelope
Plate and lower beam connecting plate, the sealing plate are fixedly connected with lower beam, and the lower beam connecting plate is symmetrically fixed on lower cross
Beam both ends, the lower beam connecting plate are fixedly connected with left and right column composition by screw, are fixed at the middle part of the lower beam
It is connected with for forming hinged otic placode with pull rod.
Railway freight-car movable grounding device described in the utility model, the left and right column composed structure is identical, and
It include column, positioning baffle, gusset and backing plate, the positioning baffle is fixed on the inside top of column, is used for upper beam group
At quick positioning when assembled, the gusset is fixed on the lower inside of column, and the backing plate is fixed on the inside of column, for filling out
Mend the gap between column and striker.
Compared with prior art, the utility model has the advantage that
1, the utility model, which solves, is loaded with the safe afloat truck mobile problem with grounding of generating equipment, effectively prevents lorry
Bearing is excessively electric, damages the risk of bearing, and safeguard work human life's safety, can meet the railway freight-car fortune for being loaded with generating equipment
Safety ground when row power supply.
2, the grounding trolley of the utility model uses the rigid mechanism with rotational freedom to draw, and can adapt to automatically because of goods
Vehicle-mounted heavy, wheel wear and dynamic change by car body position caused by curve etc. make the grounding trolley have advance, retreat
Bidirectional-movement function, and guarantee that lorry reliably draws grounding trolley.
3, the utility model by traction mechanism and pull rod composition the tractive force of lorry, brake force pass to ground connection it is small
Vehicle, the structure without changing existing railway freight-car design.
4, the utility model is easy to operate, reliable, and entire movable grounding device designs for detachable structure, accounts for after disassembly
Small with space, easily stored, when assembling, is convenient and efficient, and traction mechanism and lorry use movable connection, without increasing on lorry
Add any part that can realize quick connection.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the structural schematic diagram of wheel pair in the utility model.
Fig. 3 is the main view of wheel pair in the utility model.
Fig. 4 is the structural schematic diagram that trolley forms in the utility model.
Fig. 5 is the structural schematic diagram that pull rod forms in the utility model.
Fig. 6 is the main view of traction mechanism in the utility model.
Fig. 7 is the side view of traction mechanism in the utility model.
Fig. 8 is the assembling schematic diagram of traction mechanism in the utility model.
Fig. 9 is A-A cross-sectional view in Fig. 8.
Figure 10 is the structural schematic diagram of the utility model central post composition.
Figure 11 is the structural schematic diagram that upper beam forms in the utility model.
Figure 12 is the structural schematic diagram that lower beam forms in the utility model.
Marked in the figure: 1 forms for trolley, 2 form for pull rod, and 3 be traction mechanism, and 4 be earth lead, and 5 be wheel pair, and 6 are
Wheel mount, 7 be bearing cap, and 8 be bearing, and 9 be connecting plate, and 10 be axle, and 11 be fixed plate, and 12 be pull rod, and 13 be ear mount, and 14 are
Pin shaft, 15 form for left column, and 16 form for upper beam, and 17 form for right column, and 18 form for lower beam, and 19 be limit plate,
20 be striker, and 21 be end carriage, and 22 be gusset, and 23 be column, and 24 be backing plate, and 25 be positioning baffle, and 26 be upper beam, and 27 be upper
Cross-beam connecting plate, 28 be lower beam connecting plate, and 29 be lower beam, and 30 be otic placode, 31 sealing plates.
Specific embodiment
With reference to the accompanying drawing, the utility model is described in detail.
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, is further elaborated the utility model technology.It should be appreciated that specific embodiment described herein is only used to
It explains the utility model, is not used to limit utility model.
As shown in Figure 1, a kind of railway freight-car movable grounding device, including trolley composition 1, pull rod form 2, traction mechanism
3 and earth lead 4, the trolley composition 1 is placed on rail and can move along rail, and the traction mechanism 3 is mounted on iron
On afloat vehicle, 2 both ends of the pull rod composition are hinged with trolley composition 1 and traction mechanism 3 respectively, and being formed has rotational freedom
Rigid force transferring structure can transmit the pulling force of railway freight-car, by 3 trailer wagon of traction mechanism composition, 1 operation, and can bear pressure
Power stops 1 movement of trolley composition when railway wagon brake slows down, makes its synchronous braking, and adaptively because of truckload, wheel
It wears away and passes through the relative displacement between traction mechanism 3 caused by curve etc. and trolley composition 1 to change, it is ensured that lorry forms trolley
Reliable traction, be loaded with the railway freight-car of generating equipment and form 1 with trolley by earth lead 4 and connect, make it together with rail
The earthed circuit of dynamic connection is formed, safety ground when realizing lorry operation power generation avoids that freight car bearing is excessively electric, damages, and protects
Hinder operator's safety.
As shown in figure 4, the trolley composition 1 is made of at least one set wheel to 5, and in the present embodiment, the trolley composition
By the identical wheel of two groups of structures to forming, for two groups of wheels to being rigidly connected between 5 by connecting plate 9, the connecting plate is equipped with circle
Hole and secure component, for being connect with the earth lead one end for the railway freight-car for being loaded with generating equipment.As shown in Fig. 2, described every
Group wheel includes axle 10 and the wheel mount 6 for being symmetricly set on 10 both ends of axle to 5, and the axle is multi-diameter shaft, and wheel mount is set
There is matching stepped hole, to realize axially position, connecting plate 9 is connected on the axle 10, the wheel mount 6 passes through
Bearing assembly and axle 10 are rotatablely connected, and the wheel mount 6 is placed on the transverse direction on rail and between 10 both ends wheel mount 6 of axle
Distance is matched with the gauge of railroad track, i.e., the lateral distance of the described wheel mount can meet to be run on standard gauge 1435mm,
Axle length can also be adjusted according to practical gauge, satisfaction is run on the route of different gauges；Wherein, close to traction
One group of wheel of mechanism 3 to being fixedly connected with fixed plate 11 in the middle part of 5 axle 10, the fixed plate connect with connecting plate direction at
30 ° of angles obliquely, are set in the fixed plate 11 there are two circular hole, and one end is welded and fixed with axle 10, and the other end is for real
It is hinged that 2 one end now are formed with pull rod.
As shown in figure 3, the bearing assembly is arranged in wheel mount 6, the bearing assembly is by bearing 8 and 7 groups of bearing cap
At, with wheel mount 6 using being interference fitted, the bearing cap 7 is bolted the bearing 8 with wheel mount 6, at runtime,
The scroll forward and backward on rail of wheel mount 6, the axle 10 are translatable relative to before and after rail.
As shown in figure 5, the pull rod composition 2 includes pull rod 12 and the ear mount 13 for being symmetricly set on 12 both ends of pull rod, institute
It states that ear mount 13 is concave, is provided with and is parallel to each other and axial perpendicular with pull rod 12 in the ear mount 13 at 12 both ends of pull rod
Pin hole is provided with pin shaft 14 in the pin hole.Wherein, ear mount bottom, which is equipped with, is embedded in this hole with the matched through-hole of pull rod, pull rod
It is welded and fixed afterwards with ear mount, to increase the intensity that pull rod forms, the fixed plate 11 in the trolley composition 1 is placed in 12 one end of pull rod
Ear mount 13 groove in, and be hinged by pin shaft 14, the otic placode 30 of 3 lower part of the traction mechanism setting is placed in pull rod 12
In the groove of the ear mount 13 of the other end, and it is hinged by pin shaft 14, the ear mount 13 and fixed plate 11 at 12 both ends of pull rod
After connecting with otic placode 30, horizontally there are enough gaps to adapt to railway freight-car curvilinear motion in orbit, convenient for small
Vehicle forms the trouble-free operation on rail track.
As shown in FIG. 8 and 9, the traction mechanism 3 is mounted between the striker 20 of railway freight-car and end carriage 21, described to lead
It is whole in frame structure to draw mechanism 3, limit plate 19, the left and right ends of the traction mechanism 3 are provided on the traction mechanism 3
It is contacted with end carriage 21, and is stuck in 20 both ends of striker, the L shape limit plate 19 on the traction mechanism 3 hooks the bottom wing of end carriage 21
Edge plays the role of being fixedly connected.Quickly connect extension by traction mechanism and railway freight-car, then is made up of pull rod and drives trolley composition
Realize movement.
As shown in Figures 6 and 7, the traction mechanism 3 includes upper beam composition 16, lower beam composition 18 and left column composition
15 and right column composition 17, upper and lower crossbeam composition is connected by screw to form stationary frame structure with left and right column composition, institute
Limit plate 19 is stated symmetrically to be fixed on left and right column composition.
As shown in figure 11, the upper beam composition 16 includes upper beam 26 and upper beam connecting plate 27, the upper beam 26
Both ends are fixedly connected with upper beam connecting plate 27, and the upper beam connecting plate 27 passes through screw and the fixed company of left and right column composition
It connects, the upper beam forms plane contact on the striker 20 of 16 lower planes and railway freight-car, the length of the upper beam composition 16
Degree matches with the outer dimension of striker 20, i.e., the length that the described upper beam forms can according to different striker outer dimensions into
Row adjustment.
As shown in figure 12, the lower beam composition 18 includes lower beam 29, sealing plate 31 and lower beam connecting plate 28, described
Sealing plate 31 and lower beam 29 are fixedly connected to form quarter bend structure, and the lower beam connecting plate 28 is symmetrically fixed on 29 liang of lower beam
End, the lower beam connecting plate 28 are fixedly connected with left and right column composition by screw, are fixed at the middle part of the lower beam 29
It is connected with for forming 2 hinged otic placodes 30 with pull rod.
As shown in Figure 10, the left and right column composed structure is identical, and includes column 23, positioning baffle 25, gusset 22
With backing plate 24, the column is angle steel, and when even hanging with railway freight-car, column inner side edge is stuck at striker, plays position-limiting action,
And traction mechanism is limited jointly with limit plate and is fixed, the positioning baffle 25 is fixed on the inside top of column 23, for
Crossbeam forms 16 quick positioning when assembled, and the gusset 22 is fixed on the lower inside of column 23, and column plays reinforcing effect,
The backing plate 24 is fixed on 23 inside of column, and the gap for filling up between column 23 and striker 20 avoids gap excessive, makes
It is unstable when being run at movable grounding device.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (10)
1. a kind of railway freight-car movable grounding device, it is characterised in that: including trolley composition (1), pull rod composition (2), traction
Mechanism (3) and earth lead (4), the trolley composition (1) are placed on rail and can move along rail, the traction mechanism
(3) it is mounted on railway freight-car, the pull rod composition (2) both ends form (1) and traction mechanism (3) hingedly with trolley respectively, shape
At the rigid force transferring structure with rotational freedom, by traction mechanism (3) trailer wagon composition (1) operation, and in railway goods
Stop trolley composition (1) movement, and the relative displacement between adaptive traction mechanism (3) and trolley composition (1) when vehicle braking deceleration
Variation, the railway freight-car for being loaded with generating equipment are connect by earth lead (4) with trolley composition (1), its shape together with rail is made
At the earthed circuit of dynamic connection.
2. railway freight-car movable grounding device according to claim 1, it is characterised in that: trolley composition (1) by
At least one set wheel forms (5), when the wheel to (5) are multiple groups when, every group of wheel be identical to the structure of (5) and two adjacent groups wheel pair
(5) it is rigidly connected between by connecting plate (9), described earth lead (4) one end is connect with connecting plate (9), every group of wheel pair
It (5) include axle (10) and the wheel mount (6) for being symmetricly set on axle (10) both ends, the company of being connected on the axle (10)
Fishplate bar (9), the wheel mount (6) are rotatablely connected by bearing assembly and axle (10), and the wheel mount (6) is placed on rail
And the lateral distance between axle (10) both ends wheel mount (6) is matched with the gauge of railroad track, close to traction mechanism (3)
For one group of wheel to being fixedly connected with fixed plate (11) in the middle part of the axle (10) of (5), the pull rod forms (2) one end and fixed plate (11)
Hingedly.
3. railway freight-car movable grounding device according to claim 2, it is characterised in that: the bearing assembly setting exists
In wheel mount (6), the bearing assembly is made of bearing (8) and bearing cap (7), and the bearing (8) and wheel mount (6) used
It is full of cooperation, the bearing cap (7) is bolted with wheel mount (6), at runtime, before the wheel mount (6) is on rail
After roll, the axle (10) is translatable relative to before and after rail.
4. railway freight-car movable grounding device according to claim 2, it is characterised in that: pull rod composition (2) packet
It includes pull rod (12) and is symmetricly set on the ear mount (13) at pull rod (12) both ends, the ear mount (13) is concave, in the pull rod
(12) be provided in the ear mount (13) at both ends be parallel to each other and with the axial perpendicular pin hole of pull rod (12), set in the pin hole
It is equipped with pin shaft (14).
5. railway freight-car movable grounding device according to claim 4, it is characterised in that: the ear mount (13) and pull rod
(12) end is fixedly connected, and the fixed plate (11) in the trolley composition (1) is placed in the recessed of the ear mount (13) of pull rod (12) one end
It in slot, and is hinged by pin shaft (14), it is another that the otic placode (30) of traction mechanism (3) the lower part setting is placed in pull rod (12)
In the groove of the ear mount (13) at end, and it is hinged by pin shaft (14), the ear mount (13) and fixation at pull rod (12) both ends
After plate (11) and otic placode (30) connection, horizontally there are enough gaps to adapt to railway freight-car curve fortune in orbit
It is dynamic.
6. railway freight-car movable grounding device as claimed in any of claims 1 to 5, it is characterised in that: described
Traction mechanism (3) is mounted between the striker (20) of railway freight-car and end carriage (21), and the traction mechanism (3) is integrally in frame
Structure is provided with limit plate (19) on the traction mechanism (3), the left and right ends and end carriage (21) of the traction mechanism (3)
Contact, and striker (20) both ends are stuck in, the limit plate (19) on the traction mechanism (3) hooks the lower flange of end carriage (21).
7. railway freight-car movable grounding device according to claim 6, it is characterised in that: traction mechanism (3) packet
Upper beam composition (16), lower beam composition (18) and left and right column composition (15,17) are included, upper and lower crossbeam forms (16,18)
It is connected by screw to form stationary frame structure with left and right column composition (15,17), the limit plate (19) is symmetrically fixed on
On left and right column composition (15,17).
8. railway freight-car movable grounding device according to claim 7, it is characterised in that: the upper beam forms (16)
Including upper beam (26) and upper beam connecting plate (27), upper beam (26) both ends and upper beam connecting plate (27) fixed company
It connects, the upper beam connecting plate (27) forms (15,17) with left and right column by screw and is fixedly connected, the upper beam composition
(16) plane contact on the striker (20) of lower plane and railway freight-car, the length and striker of the upper beam composition (16)
(20) outer dimension matches.
9. railway freight-car movable grounding device according to claim 7, it is characterised in that: the lower beam forms (18)
Including lower beam (29), sealing plate (31) and lower beam connecting plate (28), the sealing plate (31) is fixedly connected with lower beam (29),
The lower beam connecting plate (28) is symmetrically fixed on lower beam (29) both ends, the lower beam connecting plate (28) by screw with
Left and right column composition (15,17) is fixedly connected, and is fixedly connected in the middle part of the lower beam (29) for forming with pull rod
(2) hinged otic placode (30).
10. railway freight-car movable grounding device according to claim 7, it is characterised in that: the left and right column composition
(15,17) structure is identical, and includes column (23), positioning baffle (25), gusset (22) and backing plate (24), the positioning baffle
(25) it is fixed on the inside top of column (23), forms (16) quick positioning when assembled, the gusset (22) for upper beam
It is fixed on the lower inside of column (23), the backing plate (24) is fixed on the inside of column (23), for filling up column (23) and punching
Hit the gap between seat (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920584842.4U CN209719586U (en) | 2019-04-26 | 2019-04-26 | A kind of railway freight-car movable grounding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920584842.4U CN209719586U (en) | 2019-04-26 | 2019-04-26 | A kind of railway freight-car movable grounding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209719586U true CN209719586U (en) | 2019-12-03 |
Family
ID=68673875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920584842.4U Withdrawn - After Issue CN209719586U (en) | 2019-04-26 | 2019-04-26 | A kind of railway freight-car movable grounding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209719586U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109941299A (en) * | 2019-04-26 | 2019-06-28 | 中车眉山车辆有限公司 | A kind of railway freight-car movable grounding device |
-
2019
- 2019-04-26 CN CN201920584842.4U patent/CN209719586U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109941299A (en) * | 2019-04-26 | 2019-06-28 | 中车眉山车辆有限公司 | A kind of railway freight-car movable grounding device |
| CN109941299B (en) * | 2019-04-26 | 2024-03-12 | 中车眉山车辆有限公司 | Movable grounding device for railway wagon |
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