CN108313075B - Top cover mechanism of sliding rail type railway hopper wagon and working method - Google Patents
Top cover mechanism of sliding rail type railway hopper wagon and working method Download PDFInfo
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- CN108313075B CN108313075B CN201810204338.7A CN201810204338A CN108313075B CN 108313075 B CN108313075 B CN 108313075B CN 201810204338 A CN201810204338 A CN 201810204338A CN 108313075 B CN108313075 B CN 108313075B
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- chain
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- top cover
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D7/00—Hopper cars
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D39/00—Wagon or like covers; Tarpaulins; Movable or foldable roofs
- B61D39/006—Opening and closing means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T30/00—Transportation of goods or passengers via railways, e.g. energy recovery or reducing air resistance
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
The application relates to a top cover mechanism of a sliding rail type railway hopper car and a working method, the top cover mechanism comprises a top cover, two ends of the top cover are slidably connected to arc-shaped sliding rails fixed on a car body, two ends of the top cover are connected with chain transmission mechanisms, the chain transmission mechanisms drive the top cover to slide along the arc-shaped sliding rails to open and close a hopper car material opening, the chain transmission mechanisms are connected with a driving device, the driving device drives the top cover to work, the driving device comprises a manual driving mechanism, a pneumatic driving mechanism and a switching mechanism which are fixed on a car body bottom plate, the manual driving mechanism and the pneumatic driving mechanism are connected with the switching mechanism, the switching mechanism realizes switching between manual driving and pneumatic driving modes, and the manual driving mechanism or the pneumatic driving mechanism outputs power to the chain transmission mechanisms through power transmission mechanisms.
Description
Technical Field
The application relates to the technical field of transportation means for railway freight, in particular to a top cover mechanism of a sliding rail type railway hopper car and a working method.
Background
Currently, bulk particulate cargo conveyances are mainly boxcars, open cars and hopper cars. If the box car and the open car are adopted for transportation, the cargo loading and unloading efficiency is low and the cost is high. While hopper cars are advantageous over open cars and box cars in terms of unloading of cargo.
The domestic active hopper car has no top cover structure except a small quantity of grain transporting cars, and loaded bulk cargoes are easily affected by bad weather, so that cargoes are damaged or leaked, and environmental pollution is caused. With the development of the railway transportation industry in China and the improvement of environmental awareness, the covered hopper car is a trend of the hopper car in China. The existing hopper car top cover is complex in operation, and has potential safety hazards; or the two ends of the top cover are provided with large rocker arms, which occupy a larger space; or the top cover is driven by only one end, so that the opening and the closing of the top cover can not be synchronous, and the service life of the top cover is reduced.
Disclosure of Invention
In order to overcome the technical defects, the application provides a top cover mechanism of a sliding rail type railway hopper car and a working method thereof, and the top cover mechanism has the advantages of long service life, small occupied space and good safety, and in order to achieve the purposes, the application adopts the following technical scheme:
the utility model provides a rail mounted railway hopper car top cap mechanism, includes the top cap, top cap both ends slidable connection is on the arc slide rail that is fixed in the automobile body, the top cap both ends are connected with chain drive mechanism, by the slip of chain drive mechanism drive its along the arc slide rail, realize opening and closing of hopper car feed inlet, chain drive mechanism is connected with drive arrangement, by its work of drive arrangement drive, drive arrangement is including being fixed in automobile body bottom plate's manual actuating mechanism, pneumatic actuating mechanism and conversion mechanism, manual actuating mechanism and pneumatic actuating mechanism all are connected with conversion mechanism, conversion mechanism realizes the switching between manual drive and the pneumatic drive mode, and manual actuating mechanism or pneumatic actuating mechanism pass through power transmission mechanism and will power take off to chain drive mechanism.
Further, the top cover comprises an arc-shaped steel plate, end plates are fixed at two ends of the arc-shaped steel plate, sliding blocks are fixed on the two end plates, the arc-shaped sliding rail penetrates through the sliding blocks, and the sliding blocks slide along the arc-shaped sliding rail to drive the top cover to slide along the arc-shaped sliding rail.
Further, a limit stop is arranged on the arc-shaped sliding rail.
Further, the concave surface internal fixation of arc steel sheet has vertical stiffening beam and horizontal stiffening beam, strengthens the self rigidity of apron, is equipped with the sealing strip on the both sides terminal surface of arc steel sheet along its slip direction, plays sealed effect when the top cap is closed.
Further, one of the chain transmission mechanisms at two ends of the top cover is used as a driving chain transmission mechanism, the other one of the chain transmission mechanisms is used as a driven chain transmission mechanism, the chain transmission mechanism comprises a driving sprocket, a driven sprocket and a transmission chain, a sprocket shaft is connected between the two driving sprockets, a sprocket shaft is connected between the two driven sprockets, synchronous operation of the two chain transmission mechanisms is achieved, a transmission chain is connected between the driving sprocket and the driven sprocket in a winding manner, the transmission chain is connected with the top cover and drives the top cover to slide, and a first bevel gear is arranged on a sprocket shaft section at one side of the driving sprocket of the driving chain transmission mechanism.
Further, the power transmission mechanism comprises a second bevel gear, the second bevel gear is connected with one end of a power transmission shaft through a universal joint, and the other end of the power transmission shaft is connected with a third bevel gear through the universal joint.
Further, the conversion mechanism comprises a conversion support, a first conversion shaft connected with the manual driving mechanism and a second conversion shaft connected with the pneumatic driving mechanism are mounted on the conversion support, one ends, opposite to the first conversion shaft and the second conversion shaft, of the first conversion shaft and the second conversion shaft are connected through a connecting piece, synchronous axial movement and independent rotation of the first conversion shaft and the second conversion shaft are achieved through the connecting piece, a fourth bevel gear is fixed on the first conversion shaft, a fifth bevel gear opposite to the fourth bevel gear in orientation is fixed on the second conversion shaft, and axial synchronous movement of the first conversion shaft and the second conversion shaft is achieved through a clutch.
Further, the manual driving mechanism comprises a hand wheel, the hand wheel is rotatably connected with the hand wheel bracket, the hand wheel is connected with the first conversion shaft through a sleeve, the sleeve is connected with the first conversion shaft through a key connection mode, the length of a key groove on the inner surface of the sleeve is larger than that of a key for connection, and the first conversion shaft can axially move along the sleeve in the sleeve and can drive the first conversion shaft to rotate.
Further, the pneumatic driving mechanism comprises an air duct connected with the vehicle body wind control device, a push rod is installed in the air duct, the end part of the push rod is provided with a rack structure, the rack structure is meshed with a gear, the gear is connected with an input shaft of the gearbox, and an output shaft of the gearbox is connected with a second conversion shaft.
The application also discloses a working method of the top cover mechanism of the sliding rail type railway hopper wagon, which comprises a manual driving mode and a pneumatic driving mode.
When the manual driving mode is used, the manual driving mechanism is connected with the power transmission mechanism by utilizing the conversion mechanism, the manual driving mechanism transmits power to the chain transmission mechanism through the power transmission mechanism, and the chain transmission mechanism drives the top cover to slide along the arc-shaped sliding rail, so that the hopper wagon material opening is opened and closed.
When the starting driving mode is used, the pneumatic driving mechanism is connected with the power transmission mechanism by utilizing the conversion mechanism, the pneumatic driving mechanism transmits power to the chain transmission mechanism through the power transmission mechanism, and the chain transmission mechanism drives the top cover to slide along the arc-shaped sliding rail, so that the hopper wagon material opening is opened and closed.
The application has the beneficial effects that:
1. the top cover adopts two driving modes of manual operation and pneumatic operation, which do not interfere with each other, and can prevent safety accidents such as damage of a transmission mechanism and the like caused by misoperation of operators.
2. The chain wheel shaft can ensure that chain transmission mechanisms at two ends of the top cover synchronously work, so that the two ends of the top cover are synchronously opened and closed, the requirement on the rigidity of the top cover is reduced, the materials are saved, and the service life is prolonged.
3. The top cover is opened and closed by sliding on the arc-shaped sliding rail, and a large rocker arm is not needed to be used as a support, so that the dead weight of the top cover mechanism is greatly reduced, and the space requirement is reduced.
4. The transmission shaft is matched with the universal joint, so that the turning of the transmission shaft can be realized, and the application can adapt to the vehicle bodies of different structural forms of hopper vehicles.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application.
FIG. 1 is a schematic view of the overall structure of the present application;
FIG. 2 is a schematic view of the structure of the top cover of the present application;
FIG. 3 is a schematic view of the chain drive mechanism of the present application;
FIG. 4 is a schematic diagram of the driving apparatus of the present application;
wherein, 1, top cover, 101, arc-shaped steel plate, 102, end plate, 103, sliding block, 104, connecting block, 105, longitudinal stiffening beam, 106, transverse stiffening beam, 107, sealing strip, 108, connecting hole, 2, arc-shaped sliding rail, 201, limit stop, 3, chain transmission mechanism, 301, driving sprocket, 302, driven sprocket, 303, transmission chain, 304, sprocket shaft, 305, first bevel gear, 4, driving device, 401, second bevel gear, 402, universal joint, 403, power transmission shaft, 404, third bevel gear, 405, shift bracket, 406, first shift shaft, 407, second shift shaft, 408, fourth bevel gear, 409, fifth bevel gear, 410, clutch, 411, hand wheel, 412, axle, 413, sleeve, 414, hand wheel bracket, 415, wind barrel, 416, push rod, 417, rack configuration, 418, gear, 419, gearbox.
Detailed Description
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
As introduced by the background art, the existing hopper car top cover is complex in operation and has potential safety hazards; or the two ends of the top cover are provided with large rocker arms, which occupy a larger space; or the top cover is driven by only one end, so that the opening and the closing of the top cover cannot be synchronous, the service life of the top cover is reduced, and the application provides a top cover mechanism of a sliding rail type railway hopper car.
In an exemplary embodiment of the application, as shown in fig. 1-4, a top cover mechanism of a sliding rail type railway hopper car comprises a top cover 1, wherein two ends of the top cover are slidably connected to an arc-shaped sliding rail 2 fixed on a car body, two ends of the top cover are connected with a chain transmission mechanism 3, the chain transmission mechanism drives the top cover to slide along the arc-shaped sliding rail to realize opening and closing of a hopper car material opening, a limit stop 201 is arranged on the arc-shaped sliding rail to limit the movement of the top cover, the chain transmission mechanism is connected with a driving device 4, the driving device drives the top cover to work, the driving device comprises a manual driving mechanism fixed on a car body bottom plate, a pneumatic driving mechanism and a conversion mechanism, the manual driving mechanism and the pneumatic driving mechanism are connected with the conversion mechanism, the conversion mechanism realizes the switching between manual driving and pneumatic driving modes, and the manual driving mechanism or the pneumatic driving mechanism outputs power to the chain transmission mechanism through a power transmission mechanism.
The top cap includes arc steel sheet 101, arc steel sheet both ends are fixed with end plate 102, equal symmetry is fixed with two sliders on every end plate, the slider is including fixed slider 103 and connecting block 104 as an organic whole, have in the slider with arc slide rail shape looks adaptation's arc slide rail groove, the arc slide rail passes through the slide rail groove the slider, the slider can follow the arc slide rail and slide, drives the top cap and follows the slip of arc slide rail, be equipped with two connecting holes 108 on the connecting block for be connected with chain drive mechanism.
The concave surface internal fixation of arc steel sheet has vertical stiffening beam 105 and horizontal stiffening beam 106, strengthens the self rigidity of apron, is equipped with sealing strip 107 on the both sides terminal surface of arc steel sheet along its slip direction, plays sealed effect when the top cap is closed, prevents debris such as rain, snow, dust entering hopper car carriage.
The chain transmission mechanism that a slider on the end plate is connected with chain transmission mechanism through the connecting hole, and the chain transmission mechanism that is connected with slider on the both sides end plate is driving chain transmission mechanism and driven chain transmission mechanism respectively, and driving chain transmission mechanism and driven chain transmission mechanism all include driving sprocket 301, driven sprocket 302 and drive chain 303, be connected with sprocket shaft 304 between driving sprocket of driving chain transmission mechanism and driven chain transmission mechanism, be connected with the sprocket shaft between the driven sprocket, realized driving chain transmission mechanism and driven chain transmission mechanism's synchronous work, the round joint has the drive chain between driving sprocket and the driven sprocket, and the tip of drive chain is fixed connection with the connecting block of slider through the connecting hole respectively, and the drive chain motion can be through the slip of slider drive top cap along arc slide rail to utilize limit stop to carry out spacingly to the removal of top cap, driving chain transmission mechanism and driven chain transmission mechanism synchronous work, and then make top cap switching both ends synchronous, reduce the requirement to top cap self rigidity, save material, increase of service life.
A first bevel gear 305 is mounted on a sprocket shaft section on the side of the drive sprocket of the drive chain transmission mechanism for receiving the power transmitted by the power transmission mechanism.
The power transmission mechanism comprises a second bevel gear 401, when the power transmission mechanism is installed, the second bevel gear is meshed with the first bevel gear, the second bevel gear is connected with one end of a power transmission shaft 403 through a universal joint 402, the other end of the power transmission shaft is connected with a third bevel gear 404 through the universal joint, and the power transmission mechanism is connected through the universal joint, so that turning of the power transmission mechanism can adapt to vehicle bodies of different structural forms of hopper vehicles.
The conversion mechanism comprises a U-shaped conversion bracket 405, a first conversion shaft 406 connected with the manual driving mechanism and a second conversion shaft 407 connected with the pneumatic driving mechanism are mounted on the conversion bracket, one ends of the first conversion shaft and the second conversion shaft are respectively connected with a connecting piece through bearings, the two bearings are limited by using a clamping ring, the first conversion shaft and the second conversion shaft can realize synchronous axial movement by using the connecting piece and are respectively connected with the connecting piece through bearings, mutually independent rotation can be realized, a fourth bevel gear 408 is fixed on the first conversion shaft, the first conversion shaft can drive the fourth bevel gear to rotate, a fifth bevel gear 409 opposite to the fourth bevel gear in orientation is fixed on the second conversion shaft, the second conversion shaft can drive the fifth bevel gear to rotate, and a clutch 410 is mounted on a shaft section, positioned between the conversion bracket and the pneumatic driving mechanism, of the second conversion shaft and used for driving the first conversion shaft and the second conversion shaft to axially move.
The manual driving mechanism comprises a hand wheel 411, an axle 412 is fixed at the center of the hand wheel, the axle is fixedly connected with a sleeve 413, a hand wheel support 414 is arranged at the position where the axle is connected with the sleeve, the hand wheel is supported, the sleeve is connected with a first conversion shaft in a key connection mode, the length of a key groove on the inner surface of the sleeve is larger than that of a connecting key, the first conversion shaft can axially move in the sleeve along the sleeve, the distance of the change of the movement of the first conversion shaft is compensated, and the sleeve can drive the first conversion shaft to rotate.
The pneumatic driving mechanism comprises an air duct 415 connected with an air control device of the vehicle body, a push rod 416 is installed in the air duct, the end part of the push rod is provided with a rack structure 417, the rack structure is meshed with a gear 418, the gear is connected with an input shaft of a gearbox 419, and an output shaft of the gearbox is connected with a second conversion shaft.
The application also discloses a working method of the top cover mechanism of the sliding rail type railway hopper wagon, which comprises a manual driving mode and a pneumatic driving mode.
When the manual driving mode is used, the clutch is used for pushing the fourth bevel gear to be meshed with the third bevel gear, the hand wheel is rotated, the fourth bevel gear rotates, power is transmitted to the second bevel gear through the universal joint and the power transmission shaft, the second bevel gear drives the first bevel gear to rotate, and then the chain transmission mechanism is driven to work, the transmission chain of the chain transmission mechanism drives the top cover to slide along the arc-shaped sliding rail, and the hopper wagon material opening is opened and closed.
When the starting driving mode is used, the clutch is utilized to push the fifth bevel gear to be meshed with the third bevel gear, the hopper car wind control device controls the push rod of the air drum to move, the gear rack is utilized to mesh and drive the fifth bevel gear to rotate, the universal joint and the power transmission shaft are utilized to transmit power to the second bevel gear, the second bevel gear drives the first bevel gear to rotate, and then the chain transmission mechanism is driven to work, and the transmission chain of the chain transmission mechanism drives the top cover to slide along the arc-shaped sliding rail, so that the hopper car material opening is opened and closed.
While the foregoing description of the embodiments of the present application has been presented in conjunction with the drawings, it should be understood that it is not intended to limit the scope of the application, but rather, it is intended to cover all modifications or variations within the scope of the application as defined by the claims of the present application.
Claims (6)
1. The utility model provides a slide rail type railway hopper car top cap mechanism which is characterized in that, includes the top cap, the slidable connection in top cap both ends is fixed in the arc slide rail on the automobile body, the top cap both ends are connected with chain drive mechanism, drive its slip along the arc slide rail by chain drive mechanism, realize opening and closing of hopper car material mouth, chain drive mechanism is connected with drive arrangement, drive its work by drive arrangement, drive arrangement includes manual driving mechanism, pneumatic driving mechanism and the conversion mechanism of being fixed in automobile body bottom plate, manual driving mechanism and pneumatic driving mechanism all are connected with the conversion mechanism, conversion mechanism realizes the switching between manual drive and the pneumatic driving mode, and manual driving mechanism or pneumatic driving mechanism pass through power transmission mechanism and export power to chain drive mechanism;
one of the chain transmission mechanisms at two ends of the top cover is used as a driving chain transmission mechanism, the other one is used as a driven chain transmission mechanism, the chain transmission mechanism comprises a driving chain wheel, a driven chain wheel and a transmission chain, a chain wheel shaft is connected between the two driving chain wheels, a chain wheel shaft is connected between the two driven chain wheels, synchronous operation of the two chain transmission mechanisms is realized, a transmission chain is wound between the driving chain wheel and the driven chain wheel, the transmission chain is connected with the top cover and drives the top cover to slide, and a first bevel gear is arranged on a chain wheel shaft section at one side of the driving chain wheel of the driving chain transmission mechanism;
the power transmission mechanism comprises a second bevel gear, the second bevel gear is connected with one end of a power transmission shaft through a universal joint, and the other end of the power transmission shaft is connected with a third bevel gear through the universal joint;
the top cover comprises an arc-shaped steel plate, end plates are fixed at two ends of the arc-shaped steel plate, sliding blocks are fixed on the two end plates, the arc-shaped sliding rail penetrates through the sliding blocks, and the sliding blocks slide along the arc-shaped sliding rail to drive the top cover to slide along the arc-shaped sliding rail;
the conversion mechanism comprises a conversion support, a first conversion shaft connected with the manual driving mechanism and a second conversion shaft connected with the pneumatic driving mechanism are mounted on the conversion support, opposite ends of the first conversion shaft and the second conversion shaft are connected through a connecting piece, synchronous axial movement and mutually independent rotation of the first conversion shaft and the second conversion shaft are achieved through the connecting piece, a fourth bevel gear is fixed on the first conversion shaft, a fifth bevel gear opposite to the fourth bevel gear in orientation is fixed on the second conversion shaft, and axial synchronous movement of the first conversion shaft and the second conversion shaft is achieved through a clutch.
2. The roof mechanism of a rail track railroad hopper car as set forth in claim 1, wherein said arcuate rail is provided with a limit stop.
3. The roof mechanism of a sliding rail type railway hopper car as claimed in claim 1, wherein the concave surface of the arc-shaped steel plate is internally fixed with a longitudinal reinforcing beam and a transverse reinforcing beam, and sealing strips are arranged on the end surfaces of the two sides of the arc-shaped steel plate along the sliding direction.
4. The roof mechanism of a rail track type railroad hopper car as set forth in claim 1, wherein the manual driving mechanism comprises a hand wheel rotatably connected with a hand wheel bracket, the hand wheel is connected with the first conversion shaft through a sleeve, the sleeve is connected with the first conversion shaft through a key connection mode, the length of a key groove on the inner surface of the sleeve is larger than the length of a connecting key, and the first conversion shaft can move in the sleeve along the axial direction of the sleeve and can drive the first conversion shaft to rotate.
5. The roof mechanism of a rail track type railroad hopper car as set forth in claim 1, wherein the pneumatic driving mechanism comprises a wind barrel connected with a car body wind control device, a push rod is installed in the wind barrel, the end of the push rod is provided with a rack structure, the rack structure is meshed with a gear, the gear is connected with an input shaft of a gear box, and an output shaft of the gear box is connected with a second conversion shaft.
6. A method of operating a rail track railroad hopper car roof mechanism of claim 1, wherein: the manual driving mode and the pneumatic driving mode are included:
when the manual driving mode is used, the manual driving mechanism is connected with the power transmission mechanism by utilizing the conversion mechanism, the manual driving mechanism transmits power to the chain transmission mechanism through the power transmission mechanism, and the chain transmission mechanism drives the top cover to slide along the arc-shaped sliding rail, so that the hopper wagon material opening is opened and closed;
when the pneumatic driving mode is used, the pneumatic driving mechanism is connected with the power transmission mechanism by utilizing the conversion mechanism, the pneumatic driving mechanism transmits power to the chain transmission mechanism through the power transmission mechanism, and the chain transmission mechanism drives the top cover to slide along the arc-shaped sliding rail, so that the hopper wagon material opening is opened and closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810204338.7A CN108313075B (en) | 2018-03-13 | 2018-03-13 | Top cover mechanism of sliding rail type railway hopper wagon and working method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810204338.7A CN108313075B (en) | 2018-03-13 | 2018-03-13 | Top cover mechanism of sliding rail type railway hopper wagon and working method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108313075A CN108313075A (en) | 2018-07-24 |
| CN108313075B true CN108313075B (en) | 2023-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810204338.7A Active CN108313075B (en) | 2018-03-13 | 2018-03-13 | Top cover mechanism of sliding rail type railway hopper wagon and working method |
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| CN109625017A (en) * | 2018-11-27 | 2019-04-16 | 中车太原机车车辆有限公司 | Tri-coupling type gear drive railroad hopper covering for roofs switching mechanism |
| CN110371150B (en) * | 2019-07-31 | 2021-06-15 | 株洲华盛实业有限公司 | Method for opening and closing top cover of freight open wagon |
| CN112590845A (en) * | 2020-12-30 | 2021-04-02 | 台州智子科技有限公司 | Stable locking top cover for railway vehicle |
| CN114013464B (en) * | 2021-11-25 | 2023-03-14 | 中车眉山车辆有限公司 | Large-volume grain hopper wagon suitable for low-loading hopper |
| CN113978501A (en) * | 2021-11-25 | 2022-01-28 | 中车眉山车辆有限公司 | Translational grain hopper car top cover |
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| CN205438804U (en) * | 2015-12-24 | 2016-08-10 | 重庆果然好农业开发有限公司 | Triangle posture chain moves cutting machine |
| CN205834263U (en) * | 2016-06-06 | 2016-12-28 | 青岛铭泰机床制造有限公司 | The manual mechanism for automatically switching of lathe cutter saddle feeding |
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