CN106427954B - Automatic braking control device - Google Patents
Automatic braking control device Download PDFInfo
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- CN106427954B CN106427954B CN201611063972.0A CN201611063972A CN106427954B CN 106427954 B CN106427954 B CN 106427954B CN 201611063972 A CN201611063972 A CN 201611063972A CN 106427954 B CN106427954 B CN 106427954B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T7/00—Brake-action initiating means
- B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
- B60T7/128—Self-acting brakes of different types for railway vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
- B61H11/00—Applications or arrangements of braking or retarding apparatus not otherwise provided for; Combinations of apparatus of different kinds or types
- B61H11/06—Applications or arrangements of braking or retarding apparatus not otherwise provided for; Combinations of apparatus of different kinds or types of hydrostatic, hydrodynamic, or aerodynamic brakes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Regulating Braking Force (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The invention discloses an automatic brake control device which comprises a pressure reducing valve, an action valve, a balance air cylinder, a first control valve and a second control valve, wherein the pressure reducing valve and the action valve are respectively connected with total air through a dust filter, an outlet of the pressure reducing valve is communicated with an A port corresponding to a relief position of the first control valve, a C port corresponding to a brake position of the first control valve is communicated with atmosphere, a B port of a pressure maintaining position of the first control valve is communicated with the balance air cylinder, a pre-control port of the action valve is communicated with the balance air cylinder, an output port of the action valve is communicated with an A port of a main control position of the second control valve, a B port of a slave control position of the second control valve is communicated with a train pipe through a dust filter, and a C port of a brake position of the second control valve is communicated with atmosphere. The invention can control the vehicle to brake frequently in the normal running process of the vehicle, can realize the emergency braking of the vehicle when the vehicle meets emergency, and can make the vehicle controller fail when the vehicle needs to be hung by other trains to prevent the vehicle controller from influencing the normal running of the train.
Description
Technical Field
The invention belongs to the technical field of railway vehicles, and particularly relates to an automatic braking control device.
Background
The conventional braking device on the railway vehicle only has a service braking function, and when the vehicle encounters an emergency situation, such as disconnection of a train pipe or failure of an air brake valve, the emergency braking of the vehicle is realized through the emergency brake valve which needs to be independently arranged, so that the operation of an operator is inconvenient; and when the vehicle needs to be continuously hung by other trains, the vehicle controller needs to be temporarily disabled, so that the influence of the vehicle controller on the normal operation of the trains is avoided. In addition, the valve body structure for controlling vehicle inflation, pressure maintaining and exhaust on the existing railway vehicle is complex, the operation stability is not high, after the valve body is used for a long time, the problem of gas leakage easily occurs in the inner passage of the valve body, and in the switching process of different control positions, the phenomenon of gas leakage easily occurs, and the stable operation of the vehicle is influenced.
Disclosure of Invention
The invention aims to: in order to solve the problems, the automatic brake control device can realize the emergency braking and the coupling operation of the vehicle on the basis of realizing the common brake function of the vehicle.
The technical scheme of the invention is realized as follows: an automatic braking control device, characterized in that: including relief pressure valve, service valve, balanced reservoir, first control valve and second control valve, the import of relief pressure valve and the input port of service valve are connected with total wind through the dust catcher of taking the check valve respectively, the A mouth intercommunication that the position corresponds is alleviated with first control valve in the export of relief pressure valve, C mouth and the atmosphere intercommunication that first control valve braking position corresponds, the B mouth and the balanced reservoir intercommunication of first control valve pressurize position, the accuse mouth and the balanced reservoir intercommunication in advance of service valve, the delivery outlet and the A mouth intercommunication of second control valve master control position of service valve, the second control valve passes through dust filter and train pipe intercommunication from the B mouth of accuse position, the C mouth and the atmosphere intercommunication of the tight braking position of second control valve.
When the brake control device is used for normal braking, the second control valve is arranged at a main control position, when the first control valve is arranged at a braking position, the equalizing air cylinder is communicated with a port C of the first control valve, the acting valve is reversed to the braking position, and a train pipe is depressurized; when the first control valve is arranged at the pressure maintaining position, all the gas paths are not communicated, and the vehicle maintains pressure; when the first control valve is arranged at the relieving position, the balance air cylinder is communicated with the port A of the first control valve, and meanwhile, the total air is communicated with a train pipe through an acting valve;
when the brake control device is used for emergency braking, the second control valve is arranged at an emergency braking position, and the train pipe is communicated with a port C of the second control valve;
when the brake control device is in continuous operation, the second control valve is arranged at a slave control position, the train pipe passage is cut off, and the brake control device of the vehicle fails.
The automatic brake control device comprises a first control valve and a second control valve, wherein the first control valve and the second control valve are identical in structure, the first control valve comprises a valve body, an upper chamber, a middle chamber and a lower chamber are arranged in the valve body, A, B, C ports which are respectively communicated with the upper chamber, the middle chamber and the lower chamber are respectively provided with sealing sleeves, the sealing sleeves are tightly pressed at corresponding valve ports under the action of a main spring, ejector pins are arranged on the sealing sleeves, a rotating shaft is arranged in the middle chamber, a protruding part is arranged on the rotating shaft, the protruding part on the rotating shaft is matched with the corresponding ejector pins by rotating the rotating shaft and overcomes the acting force of the main spring to prop open the sealing sleeves at the valve ports, so that the B port is correspondingly communicated with the A port or the C port, when the B port is communicated with the A port, the A port is in a closed state, and when the B port is communicated with the C port, the A, B, C port is not communicated.
The automatic brake control device is characterized in that valve covers are respectively arranged at two ends of the valve body, and the valve covers respectively press the corresponding main springs in the upper chamber and the lower chamber, so that the sealing sleeves in the upper chamber and the lower chamber are respectively pressed at the corresponding valve openings.
According to the automatic brake control device, the sealing rubber gasket is embedded in the sealing end face of the sealing sleeve, and the sealing rubber gasket is correspondingly matched and sealed with the valve port step.
The automatic braking control device is characterized in that the thimble is provided with a supporting part which is protruded along the radial direction, the periphery of the supporting part is attached to the inner wall of a middle cavity in the valve body, and the supporting part is provided with a through hole for air circulation.
One end of the rotating shaft of the automatic braking control device penetrates out of the valve body and is fixedly connected with the handle.
The automatic brake control device is characterized in that a limiting ring is arranged at the other end of the rotating shaft, an inflation position positioning groove, a pressure maintaining position positioning groove and an exhaust position positioning groove which correspond to an inflation position, a pressure maintaining position and an exhaust position of a control valve are respectively arranged on the limiting ring, a positioning mechanism which is correspondingly matched with the limiting ring is arranged on the valve body, and the rotating shaft is stabilized at a corresponding control position through the matching of a groove structure on the limiting ring and the positioning mechanism.
According to the automatic brake control device, the positioning mechanism comprises a steel ball, a limiting shaft and a limiting spring, the steel ball is arranged at the end part of the limiting shaft and is arranged in a corresponding groove on the limiting ring, the limiting spring is tightly pressed on the other end surface of the limiting shaft through a screw, when the handle is in a vertical state, the steel ball is arranged in the pressure maintaining position positioning groove, and the control valve is in the pressure maintaining position.
According to the automatic brake control device, the corresponding parts of the limiting ring and the two ends of the pressure maintaining position positioning groove are of inclined surface structures inclined towards the pressure maintaining position positioning groove, and when the limiting ring rotates to the position where the inclined surface structures correspond to the steel balls, the handle can naturally reset to a vertical state, namely the pressure maintaining position of the control valve.
The invention can control the vehicle brake to excite, maintain pressure and release in the normal running process of the vehicle, can realize the emergency braking of the vehicle when the vehicle meets emergency, and can enable the vehicle controller to lose efficacy when the vehicle needs to be hung by other trains so as to prevent the vehicle controller from influencing the normal running of the train.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a top view of the present invention.
Fig. 3 is a working principle diagram of the present invention.
Fig. 4 is a schematic view of the structure of the control valve of the present invention.
Fig. 5 isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A of fig. 4.
Fig. 6 is a schematic diagram of the operative position of the control valve of the present invention.
The mark in the figure is: the device comprises a pressure reducing valve 1, an action valve 2, a balance air cylinder 3, a first control valve 4, a second control valve 5, a dust filter 6, a dust filter 7, a valve body 8, a sealing sleeve 9, an ejector pin 10, a supporting part 10a, a rotating shaft 11, a boss 11a, a valve cover 12, a sealing rubber gasket 13, a handle 14, a limiting ring 15, an inflation position positioning groove 16a, a pressure maintaining position positioning groove 16b, an exhaust position positioning groove 16c, a steel ball 17, a limiting shaft 18, a limiting spring 19, a screw 20 and a main spring 21.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, 2 and 3, an automatic brake control device includes a pressure reducing valve 1, an acting valve 2, a balance reservoir 3, a first control valve 4 and a second control valve 5, an inlet of the pressure reducing valve 1 and an inlet of the acting valve 2 are respectively connected with the total air through a dust filter 6 with a one-way valve, an outlet of the pressure reducing valve 1 is communicated with an a port corresponding to a relief position of the first control valve 4, a C port corresponding to a braking position of the first control valve 4 is communicated with the atmosphere, a B port of a pressure maintaining position of the first control valve 4 is communicated with the balance reservoir 3, a pre-control port of the acting valve 2 is communicated with the balance reservoir 3, an outlet of the acting valve 2 is communicated with a port of a main control position of the second control valve 5, the second control valve 5 is communicated with a train pipe through a dust filter 7 from the B port of the main control position, and a C port of a tight braking position of the second control valve 5 is communicated with the atmosphere. The invention is externally connected with three interfaces: the total wind, the train pipe and the balance air cylinder pressure gauge can work normally when the train pipe is at a constant pressure of 500kPa or 600 kPa.
When the brake control device is a service brake, the output pressure of the pressure reducing valve is adjusted to a constant pressure (usually 500kPa for a cargo train and 600kPa for a passenger train), and the second control valve 5 is arranged at a master control position. At this moment, the handle of the first control valve 4 is operated to the corresponding action position, and the braking, pressure maintaining and relieving of each vehicle brake of the train can be controlled, and the method specifically comprises the following steps: when the first control valve 4 is arranged at a braking position, the equalizing air cylinder 3 is communicated with a port C of the first control valve 4, the acting valve 2 is reversed to the braking position, and a train pipe is depressurized; when the first control valve 4 is arranged at the pressure maintaining position, all gas paths are not communicated, and the vehicle maintains pressure; when the first control valve 4 is placed at the relieving position, the equalizing air cylinder 3 is communicated with the port A of the first control valve 4, and meanwhile, the total air is communicated with a train pipe through the acting valve 2.
When the brake control device is used for emergency braking, the second control valve 5 is arranged at an emergency braking position, and the train pipe is communicated with the port C of the second control valve 5.
When the brake control device is in continuous operation, the second control valve 5 is arranged at a slave control position, the train pipe passage is cut off, and the brake control device of the vehicle fails.
As shown in fig. 4, 5 and 6, the first control valve 4 and the second control valve 5 have the same structure, the first control valve 4 includes a valve body 8, an upper chamber, a middle chamber and a lower chamber are arranged in the valve body 8, a A, B, C port respectively communicated with the upper chamber, the middle chamber and the lower chamber is arranged on the valve body 8, a sealing sleeve 9 is respectively arranged in the upper chamber and the lower chamber, the sealing sleeve 9 is pressed at the corresponding valve port under the action of a main spring 21, valve covers 12 are respectively arranged at two ends of the valve body 8, the corresponding main spring 21 is respectively pressed and arranged in the upper chamber and the lower chamber by the valve covers 12, so that the sealing sleeves 9 in the upper chamber and the lower chamber are respectively pressed and arranged at the corresponding valve ports, a sealing rubber pad 13 is embedded in a sealing end face of the sealing sleeve 9, the sealing rubber pad 13 is correspondingly matched and sealed with the step, a thimble 10 is arranged on the sealing sleeve 9, the thimble 10 is provided with a supporting part 10a protruding along the radial direction, the periphery of the supporting part 10a is attached to the inner wall of a middle chamber in the valve body 8, the supporting part 10a is provided with a through hole for gas circulation, the thimble can not swing in the radial direction in the moving process through the supporting part, a rotating shaft 11 is arranged in the middle chamber, one end of the rotating shaft 11 penetrates out of the valve body 8 and is fixedly connected with a handle 14, the rotating shaft 11 is provided with a protruding part 11a, the protruding part 11a on the rotating shaft 11 is matched with the corresponding thimble 10 by rotating the rotating shaft 11 and pushes open a sealing sleeve 9 at the valve port by overcoming the acting force of a main spring 21, so that the port B is correspondingly communicated with the port A or the port C, when the port B is communicated with the port A, the port C is in a closed state, and when the port B is communicated with the port C, the port A is in a closed state, when the rotating shaft is not rotating, the A, B, C ports are not connected. The handle rotates to drive the rotating shaft connected with the handle to rotate, and the ejector pins on the corresponding sealing sleeves are respectively ejected to realize the on-off of corresponding gas circuits, so that the vehicle can be stably and reliably switched between inflation, pressure maintaining and exhaust positions.
The other end of the rotating shaft 11 is provided with a limiting ring 15, the rotation angle of the rotating shaft is limited by the limiting ring, the limiting ring 15 is respectively provided with an inflation position positioning groove 16a, a pressure maintaining position positioning groove 16b and an exhaust position positioning groove 16c corresponding to an inflation position, a pressure maintaining position and an exhaust position of a control valve, the valve body 8 is provided with a positioning mechanism corresponding to the limiting ring 15, the rotating shaft 11 is stabilized at a corresponding control position through the matching of a groove structure on the limiting ring 15 and the positioning mechanism, the positioning mechanism comprises a steel ball 17, a limiting shaft 18 and a limiting spring 19, the steel ball 17 is arranged at the end of the limiting shaft 18 and is arranged in a corresponding groove on the limiting ring 15, the limiting spring 19 is pressed at the other end face of the limiting shaft 18 through a screw 20, when the handle 14 is in a vertical state, the steel ball 17 is arranged in the pressure maintaining position positioning groove 16b, the control valve is in the pressure maintaining position, the corresponding parts of the two ends of the positioning groove 16b on the limiting ring 15 are in an inclined plane structure inclined towards the pressure maintaining position, when the handle 14 is in a vertical state, and the pressure maintaining structure is rotated to the inclined plane corresponding to the inclined position of the limiting ring 15, and the handle is in a natural state, and the pressure maintaining position is reset state.
The control valve of the present invention has three active positions: when the handle is arranged in the direction of the port C, the port A is communicated with the port B; when the handle is arranged at the opening B (middle position), the three openings A, B, C are not communicated; when the handle is arranged in the direction of the port A, the port B is communicated with the port C. When the handle is within +/-30 degrees of being vertical to the installation surface, the handle can be naturally reset to a vertical state, namely a pressure maintaining position.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. An automatic braking control device characterized in that: the device comprises a pressure reducing valve (1), an action valve (2), a balance air cylinder (3), a first control valve (4) and a second control valve (5), wherein an inlet of the pressure reducing valve (1) and an input port of the action valve (2) are respectively connected with the total air through a dust filter (6) with a one-way valve, an outlet of the pressure reducing valve (1) is communicated with a port A corresponding to a relief position of the first control valve (4), a port C corresponding to a braking position of the first control valve (4) is communicated with the atmosphere, a port B of a pressure maintaining position of the first control valve (4) is communicated with the balance air cylinder (3), a pre-control port of the action valve (2) is communicated with the balance air cylinder (3), an output port of the action valve (2) is communicated with a port A of a main control position of the second control valve (5), the second control valve (5) is communicated with a train pipe through a dust filtering device (7) from the port B of the control position, and a port C of a brake emergency position of the second control valve (5) is communicated with the atmosphere;
when the brake control device is used for service braking, the second control valve (5) is arranged at a main control position, when the first control valve (4) is arranged at a brake position, the equalizing air cylinder (3) is communicated with a port C of the first control valve (4), the acting valve (2) is reversed to the brake position, and the train pipe is depressurized; when the first control valve (4) is arranged at the pressure maintaining position, all gas paths are not communicated, and the vehicle maintains pressure; when the first control valve (4) is placed at a relieving position, the equalizing air cylinder (3) is communicated with an A port of the first control valve (4), and meanwhile, the total air is communicated with a train pipe through the acting valve (2);
when the brake control device is used for emergency braking, the second control valve (5) is arranged at an emergency braking position, and the train pipe is communicated with a port C of the second control valve (5);
when the brake control device is in continuous operation, the second control valve (5) is arranged at a slave control position, the train pipe passage is cut off, and the brake control device of the vehicle fails.
2. The automatic brake control apparatus according to claim 1, characterized in that: the structure of the first control valve (4) is the same as that of the second control valve (5), the first control valve (4) comprises a valve body (8), an upper chamber, a middle chamber and a lower chamber are arranged in the valve body (8), a A, B, C port which is correspondingly communicated with the upper chamber, the middle chamber and the lower chamber is arranged on the valve body (8), sealing sleeves (9) are respectively arranged in the upper chamber and the lower chamber, the sealing sleeves (9) are tightly pressed at corresponding valve ports under the action of a main spring (21), ejector pins (10) are arranged on the sealing sleeves (9), a rotating shaft (11) is arranged in the middle chamber, protruding parts (11 a) are arranged on the rotating shaft (11), the protruding parts (11 a) on the rotating shaft (11) are matched with the corresponding ejector pins (10) and overcome the acting force of the main spring (21) to jack the sealing sleeves (9) at the valve ports, so that the port B is correspondingly communicated with the port A or the port C port, when the port is communicated with the A port, the C port is in a closed state, and when the port is not communicated with the xft 3262.
3. The automatic brake control apparatus according to claim 2, characterized in that: valve gap (12) are provided with respectively at valve body (8) both ends, valve gap (12) are with corresponding main spring (21) pressure equipment respectively in upper chamber and lower cavity, make seal cover (9) in upper and lower cavity compress tightly respectively at corresponding valve mouth department.
4. The automatic brake control apparatus according to claim 3, characterized in that: and a sealing rubber pad (13) is embedded in the sealing end face of the sealing sleeve (9), and the sealing rubber pad (13) is correspondingly matched and sealed with the valve port step.
5. The automatic brake control apparatus according to claim 2, characterized in that: the thimble (10) is provided with a supporting part (10 a) which is raised along the radial direction, the periphery of the supporting part (10 a) is attached to the inner wall of the middle cavity in the valve body (8), and the supporting part (10 a) is provided with a through hole for the circulation of gas.
6. The automatic brake control apparatus according to claim 2, characterized in that: one end of the rotating shaft (11) penetrates out of the valve body (8) and is fixedly connected with the handle (14).
7. The automatic brake control apparatus according to claim 6, characterized in that: the other end of axis of rotation (11) is provided with spacing ring (15) be provided with respectively on spacing ring (15) with the control valve aerify position, pressurize position and exhaust position and aerify position positioning groove (16 a), pressurize position positioning groove (16 b) and exhaust position positioning groove (16 c) that the position corresponds be provided with on valve body (8) and correspond complex positioning mechanism with spacing ring (15), through groove structure and positioning mechanism's on spacing ring (15 cooperation makes axis of rotation (11) are stabilized in corresponding control position.
8. The automatic brake control apparatus according to claim 7, characterized in that: the positioning mechanism comprises a steel ball (17), a limiting shaft (18) and a limiting spring (19), the steel ball (17) is arranged at the end part of the limiting shaft (18) and is arranged in a corresponding groove on the limiting ring (15), the limiting spring (19) is tightly pressed on the other end surface of the limiting shaft (18) through a screw (20), when the handle (14) is in a vertical state, the steel ball (17) is arranged in a pressure maintaining position positioning groove (16 b), and the control valve is in a pressure maintaining position.
9. The automatic brake control apparatus according to claim 8, characterized in that: the corresponding parts of the two ends of the pressure maintaining position positioning groove (16 b) on the limiting ring (15) are inclined plane structures inclined towards the pressure maintaining position positioning groove (16 b), and when the limiting ring (15) rotates to the position corresponding to the inclined plane structure and the steel ball (17), the handle can naturally reset to a vertical state, namely the pressure maintaining position of the control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611063972.0A CN106427954B (en) | 2016-11-28 | 2016-11-28 | Automatic braking control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611063972.0A CN106427954B (en) | 2016-11-28 | 2016-11-28 | Automatic braking control device |
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| Publication Number | Publication Date |
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| CN106427954A CN106427954A (en) | 2017-02-22 |
| CN106427954B true CN106427954B (en) | 2023-04-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611063972.0A Active CN106427954B (en) | 2016-11-28 | 2016-11-28 | Automatic braking control device |
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| CN (1) | CN106427954B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107662622A (en) * | 2017-10-31 | 2018-02-06 | 眉山中车制动科技股份有限公司 | Road maintainance machinery materials vehicle brake |
| CN111775999B (en) * | 2020-07-14 | 2021-06-04 | 中车株洲电力机车有限公司 | Train pipe quantitative pressure reduction control system and method |
| CN114228774A (en) * | 2021-11-16 | 2022-03-25 | 山东智捷专用车制造有限公司 | Automatic braking control device |
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| CN201882072U (en) * | 2010-12-08 | 2011-06-29 | 中国铁道科学研究院机车车辆研究所 | Electro-pneumatic braking system |
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| US3937074A (en) * | 1974-08-26 | 1976-02-10 | Westinghouse Air Brake Company | Apparatus for checking integrity of magnet valves in electro-pneumatic brake systems |
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| US5791744A (en) * | 1997-01-28 | 1998-08-11 | Westinghouse Air Brake Company | Pneumatic trainline control unit |
| US7434895B2 (en) * | 2005-09-16 | 2008-10-14 | New York Air Brake Corporation | Electronic equalizing reservoir controller with pneumatic penalty override and reduction limiting |
| CN2863581Y (en) * | 2005-11-09 | 2007-01-31 | 符清玉 | K18 type grouped pneumatic opening-and-closing control device for railway vehicle |
| DE102010005091B4 (en) * | 2010-01-18 | 2013-08-08 | Siemens Aktiengesellschaft | Brake arrangement of a rail vehicle |
| CN201792855U (en) * | 2010-09-03 | 2011-04-13 | 南车株洲电力机车有限公司 | Rail traffic train pipe control system |
| CN102009646B (en) * | 2010-12-02 | 2013-03-06 | 南车株洲电力机车有限公司 | Control system for distribution valve of brake system of storage battery power engineering truck |
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| CN202320278U (en) * | 2011-12-08 | 2012-07-11 | 广州铁路职业技术学院 | Release device for brake of motor-driven vehicle |
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| CN201882072U (en) * | 2010-12-08 | 2011-06-29 | 中国铁道科学研究院机车车辆研究所 | Electro-pneumatic braking system |
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