CN107631889B - Rail vehicle parking brake performance test system and test method - Google Patents
Rail vehicle parking brake performance test system and test method Download PDFInfo
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Abstract
The invention provides a rail vehicle parking brake performance test system and a test method, wherein the test system comprises: the device comprises a first connecting piece, a second connecting piece, a force sensor and a traction device; the first connecting piece is used for being connected with a vehicle to be tested, the second connecting piece is used for being connected with the traction device, and the traction device is used for providing traction force for the second connecting piece; the first connecting piece is also connected with the second connecting piece; the force sensor is arranged between the first connecting piece and the second connecting piece and used for detecting the force applied to the first connecting piece by the second connecting piece under the action of the traction force; when the vehicle to be tested moves, if the force detected by the force sensor is less than or equal to the set sliding force, the parking brake performance of the vehicle to be tested does not reach the standard. The method obtains various set gliding forces according to different ramp angles or wind power calculation, and can achieve the effect of testing the parking brake performance of the vehicle to be tested under various ramp angles or wind power conditions, thereby widening the test range and solving the problems in the prior art.
Description
Technical Field
The invention relates to a vehicle braking technology, in particular to a system and a method for testing parking braking performance of a railway vehicle.
Background
The braking mode of rail vehicles such as high-speed motor train units and urban rail trains mainly comprises the following steps: electric braking, air braking and parking braking. The parking brake is a mechanical brake mode used after the rail vehicle loses electric brake and air brake, avoids the phenomenon that the rail vehicle slips due to factors such as ramp, wind power and the like, and further improves the safety of the rail train. The reliability of parking brake is an important factor influencing the parking safety of the rail train, and the parking brake performance needs to be strictly tested in the process of testing the performance of the rail train.
FIG. 1 is a schematic structural diagram of a parking brake performance test in the prior art. As shown in fig. 1, the process of testing parking brake performance is generally: the method comprises the steps of stopping the railway vehicle 10 on a set ramp 20, applying parking brake to the railway vehicle, observing whether the railway vehicle slides down, and if the railway vehicle slides down, indicating that the parking brake force of the railway vehicle is smaller than the slide-down force of the vehicle, ensuring that the parking brake performance does not meet the design requirement.
It is considered that the gliding force of the rail vehicle is influenced not only by the inclination angle of the ramp but also by the wind force. In the actual operation process of the rail vehicle, the road conditions and the environmental wind power of the operation line are various, but the factors of design difficulty and implementation cost are considered, and various road conditions and environmental wind power cannot be simulated in the test process, so that the test on the parking brake performance of the rail vehicle has certain limitation.
Disclosure of Invention
The invention provides a rail vehicle parking brake performance testing system and a rail vehicle parking brake performance testing method, which are used for solving the problem that the testing of the rail vehicle parking brake performance in the prior art is limited.
The invention provides a rail vehicle parking brake performance test system in a first aspect, which comprises: the device comprises a first connecting piece, a second connecting piece, a force sensor and a traction device; wherein the content of the first and second substances,
the first connecting piece is used for being connected with a vehicle to be tested, the second connecting piece is used for being connected with a traction device, and the traction device is used for providing traction force for the second connecting piece; the first connecting piece is also connected with the second connecting piece; the force sensor is arranged between the first connecting piece and the second connecting piece and used for detecting the force applied to the first connecting piece by the second connecting piece under the action of the traction force; when the vehicle to be tested moves, if the force detected by the force sensor is less than or equal to the set sliding force, the parking brake performance of the vehicle to be tested does not reach the standard.
According to the rail vehicle parking brake performance test system, the first connecting piece comprises a first coupler connecting part and a first connecting part which are detachably connected, and the first coupler connecting part is used for being connected with a coupler of the vehicle to be tested;
the second coupling includes a second coupler coupling portion for coupling with a coupler of the towing vehicle and a second coupling portion;
the first connecting portion is connected with the second connecting portion, and the force sensor is arranged between the first connecting portion and the second connecting portion.
The rail vehicle parking brake performance test system as described above, the second connecting portion includes: the force applying base part and the second installation parts are respectively arranged at two ends of the force applying base part, and the end parts of the second installation parts are fixed on the second coupler connecting part;
the first connection portion includes: the device comprises a stress base and first installation parts respectively arranged at two ends of the stress base; the first installation part arranged at one end of the force bearing base part penetrates through a region surrounded by the force application base part, the second installation parts arranged at two ends of the force application base part and the second coupler connection part; the end parts of the first mounting parts arranged at the two ends of the stressed base part are detachably connected with the first coupler connecting part;
the force sensor is disposed between the force receiving base and the force applying base.
According to the rail vehicle parking brake performance test system, the first installation parts at the two ends of the stressed base part are perpendicular to the stressed base part.
According to the rail vehicle parking brake performance test system, the second installation parts at the two ends of the force application base part are perpendicular to the force application base part.
According to the rail vehicle parking brake performance test system, the bolt holes are formed in the end portions of the first coupler connecting portion and the first mounting portion.
According to the rail vehicle parking brake performance test system, the traction device is a traction vehicle.
According to the rail vehicle parking brake performance test system, the second coupler connecting part and the second connecting part are integrally formed.
The invention provides a test method adopting the rail vehicle parking brake performance test system, which comprises the following steps:
acquiring the motion state of a vehicle to be detected on a straight track;
when the vehicle to be detected is in a moving state, acquiring traction force detected by a force sensor;
and when the traction force is smaller than or equal to the set sliding force, judging that the braking performance of the vehicle to be tested does not reach the standard.
In the above test method, the set slip force is calculated by the following formula:
F＝mgsinθ+fcosθ，
wherein F is the set gliding force, m is the total mass of the vehicle to be measured, g is the gravity acceleration, theta is the set ramp angle, and F is the maximum wind power.
According to the technical scheme provided by the invention, the first connecting piece is connected with the vehicle to be tested, the second connecting piece is connected with the traction device for providing traction force, the first connecting piece is connected with the second connecting piece, the first connecting piece and the second connecting piece are provided with the force sensors, the force sensors are used for detecting the force applied to the first connecting piece by the second connecting piece under the action of the traction force, and when the force detected by the force sensors is within the range of the set glide force, if the vehicle to be tested moves, the parking brake performance is judged not to reach the standard. The method obtains various set gliding forces according to different ramp angles or wind power calculation, and can achieve the effect of testing the parking brake performance of the vehicle to be tested under various ramp angles or wind power conditions, thereby widening the test range and solving the problems in the prior art. The device is simple in structure, low in manufacturing cost and testing cost, and capable of testing vehicles to be tested by placing the vehicles on a horizontal plane without being parked on a ramp.
Drawings
FIG. 1 is a schematic diagram of a prior art parking brake performance test;
FIG. 2 is a schematic structural diagram of a system for testing parking brake performance of a railway vehicle according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a first connecting element in the parking brake performance testing system of the railway vehicle according to an embodiment of the present invention;
FIG. 4 is an assembled view of a first connecting member of the parking brake performance testing system for a railway vehicle according to one embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a second connecting member in the parking brake performance testing system for a railway vehicle according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram illustrating a parking brake performance testing method using the testing system according to the first embodiment of the present invention;
fig. 7 is a flowchart of a method for testing parking brake performance of a rail vehicle according to a second embodiment of the present invention.
Reference numerals:
1-a first connector; 11-a first coupler attachment portion; 12-a first connection;
121-a stressed base; 122-a first mounting portion; 2-a second connector;
21-a second coupler attachment portion; 22-a second connection; 221-a force application base;
222-a second mounting portion; 3-a force sensor; 4-a data processing device;
5-bolt; 6-a nut; 10-a rail vehicle;
20-a ramp; 30-a vehicle to be tested; 40-towing vehicle.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
The embodiment provides a rail vehicle parking brake performance test system for testing the parking brake performance of a rail vehicle, and testing the parking brake performance by integrating various ramp angles and various wind power sizes.
Fig. 2 is a schematic structural diagram of a system for testing parking brake performance of a railway vehicle according to an embodiment of the present invention. As shown in fig. 2, the parking brake performance testing system for a railway vehicle provided by the embodiment includes: a first connecting piece 1, a second connecting piece 2, a force sensor 3 and a traction device. The first connecting piece 1 is used for being connected with a vehicle to be tested, and the second connecting piece 2 is used for being connected with a traction device. The traction means are used to provide traction to the second connection element 2, for example: providing a pulling force. The traction device can be a traction vehicle or other device capable of providing tension.
The first connecting piece 1 is also connected with the second connecting piece 2, the force sensor 3 is arranged between the first connecting piece 1 and the second connecting piece 2, and the force sensor 3 is used for detecting the force applied to the first connecting piece 1 by the second connecting piece 2 under the action of the traction force.
Only apply parking brake to the vehicle that awaits measuring, link to each other through first connecting piece 1 and second connecting piece 2 between above-mentioned vehicle that awaits measuring and the traction vehicle, traction vehicle starts the operation and can drive second connecting piece 2 and exert pulling force to first connecting piece 1, and first connecting piece 1 also can exert pulling force to the vehicle that awaits measuring. A force sensor 3 is arranged between the first connecting member 1 and the second connecting member 2 for detecting the above-mentioned pulling force. If the pulling force is within the range of less than or equal to the set sliding force, if the vehicle to be tested moves, the parking brake performance does not reach the standard; and if the vehicle to be tested does not move, indicating that the parking brake performance reaches the standard. Alternatively, it can also be understood that: in the test process, judging whether the vehicle to be tested moves, and when the vehicle to be tested moves, if the force detected by the force sensor is less than or equal to the set sliding force, judging that the parking brake performance of the vehicle to be tested does not reach the standard; and if the force detected by the force sensor is greater than the set gliding force, judging that the parking brake performance of the vehicle to be tested reaches the standard.
The set gliding force can be obtained by calculation according to the angles and/or the wind power of different slopes, so that different set gliding forces can be obtained by adjusting the angles and/or the wind power of the slopes. And comparing the various set gliding forces with the force detected by the force sensor 3, and judging whether the vehicle to be tested moves to know whether the parking brake performance of the vehicle to be tested reaches the standard under different ramp angles and/or wind power environments. The force sensor 3 has a span greater than the set glide force.
The technical scheme that this embodiment provided, it links to each other with the vehicle that awaits measuring through adopting first connecting piece, the second connecting piece links to each other with the draw gear who is used for providing traction force, first connecting piece and second connecting piece link to each other and first connecting piece and second connecting piece set up force sensor, force sensor is used for detecting the second connecting piece and exerts the force to first connecting piece under the effect of above-mentioned traction force, when the power that force sensor detected is in the within range of setting for glide force, if the vehicle that awaits measuring takes place to remove, then judge that the performance of parking braking is not up to standard. The method obtains various set gliding forces according to different ramp angles or wind power calculation, and can achieve the effect of testing the parking brake performance of the vehicle to be tested under various ramp angles or wind power conditions, thereby widening the test range and solving the problems in the prior art. The device is simple in structure, low in manufacturing cost and testing cost, and capable of testing vehicles to be tested by placing the vehicles on a horizontal plane without being parked on a ramp.
Fig. 3 is a schematic structural diagram of a first connecting element in a testing system for parking brake performance of a railway vehicle according to a first embodiment of the present invention, fig. 4 is an assembly view of the first connecting element in the testing system for parking brake performance of a railway vehicle according to a first embodiment of the present invention, and fig. 5 is a schematic structural diagram of a second connecting element in the testing system for parking brake performance of a railway vehicle according to a first embodiment of the present invention.
As shown in fig. 3 to 5, the first connecting member 1 is connected to the vehicle to be tested and the second connecting member 2, specifically, the first connecting member 1 includes: the first coupler connecting part 11 and the first connecting part 12 are detachably connected, and the first coupler connecting part 11 and the first connecting part 12 can be in screw connection, clamping connection and the like. The first coupler coupling part 11 is used for coupling with a coupler of a vehicle to be tested, and the structure of the first coupler coupling part 11, such as the structure shown in fig. 1, 3 and 4, may be specifically set according to the structure of the coupler.
Second connecting piece 2 links to each other with traction vehicle and first connecting piece 1 respectively, and is specific, second connecting piece 2 includes: the second coupler 21 and the second coupling portion 22 may be fixedly coupled or detachably coupled to each other, or the second coupler 21 and the second coupling portion 22 may be integrally formed. The second coupler attachment portion 21 is used to attach to a coupler of a towing vehicle, and the configuration of the second coupler attachment portion 21, such as the configuration shown in fig. 1 and 5, may be specifically set according to the configuration of the coupler.
The first connecting portion 12 and the second connecting portion 22 are connected, and the force sensor 3 is disposed between the first connecting portion 11 and the second connecting portion 22, and is configured to detect a force applied to the first connecting portion 12 by the second connecting portion 22.
Regarding the structure and the connection manner of the first connection portion 12 and the second connection portion 22, the embodiment provides a specific structure, and those skilled in the art can modify the structure provided in the embodiment to obtain other implementation manners to implement the above functions.
As shown in fig. 3, 4 and 5, the first connection portion 12 includes: the force-receiving base 121 and the two first mounting portions 122, the two first mounting portions 122 are respectively disposed at two ends of the force-receiving base 121. Specifically, one end of each of the two first mounting portions 122 is fixed on the force-receiving base portion 121, and the other end faces the first coupler connecting portion 11 and is detachably connected to the first coupler connecting portion 11. The above force receiving base portion and the two first mounting portions 122 form a frame-type structure as shown in fig. 3 and 4.
The second connection portion 22 includes: the biasing base 221 and the two second mounting portions 222, the two second mounting portions 222 are respectively provided at both ends of the biasing base 221. Specifically, the two second mounting portions 222 are each fixed at one end to the biasing base portion 221 and at the other end toward the second coupler attachment portion 21 and are connected to the second coupler attachment portion 21. The urging base portion 221, the two second mounting portions 222, and the second coupler attachment portion 21 form a frame-shaped structure as shown in fig. 5.
In the process of assembling the first link 1 and the second link 2, one of the first mounting portions 122 of the first connecting portion 12 is passed through the second connecting portion 22, and thereafter, the first connecting portion 12 is assembled with the first coupler connecting portion 11. After assembly, a relative movement can be produced between the first connecting part 1 and the second connecting part 2. As shown in fig. 1, when the traction force of the towing vehicle is in the M direction, the towing vehicle drives the second connecting member 2 to move in the M direction, and the force applying base 221 applies a pulling force in the M direction to the force receiving base 121. When the force sensor 3 is disposed between the force receiving base 121 and the urging base 221, the M-direction tensile force applied by the urging base 221 acts on the force sensor 3, and the force sensor 3 can detect the tensile force.
Besides the above, the number of the first mounting portions 122 may be one, and the first mounting portions are disposed at one end of the force receiving base 121; the number of the second mounting portions 222 may be one, and the second mounting portions may be provided at one end of the urging base portion 221. Alternatively, the present invention may also be implemented in other ways by those skilled in the art, and the present invention is not limited thereto.
Further, the first mounting portions 122 are perpendicular to the force receiving base portion 121, and the second mounting portions 222 are perpendicular to the force applying base portion 221.
In this embodiment, the first coupler connecting portion 11 and the first coupler connecting portion 12 are screwed to each other, a bolt hole is formed in the first coupler connecting portion 11, a bolt hole is also formed in the end portion of the first mounting portion 122, and a bolt is screwed to a nut after passing through the bolt hole of the first mounting portion 122 and the bolt hole of the first coupler connecting portion 11 in this order.
Fig. 6 is a schematic structural diagram illustrating a parking brake performance test performed by the test system according to the first embodiment of the present invention. As shown in fig. 6, the process of testing the parking brake performance of the vehicle 30 under test by using the test system provided in the above description is as follows:
(1) a plurality of gliding forces are calculated in advance according to different ramp angles and/or wind power.
(2) Parking the vehicle 30 to be tested and the traction vehicle 40 on a straight track, loading the vehicle 30 to be tested according to the specified load weight of the vehicle 30 to be tested, and simulating the passenger carrying state of the vehicle 30 to be tested;
(3) connecting the test system with a vehicle 30 to be tested and a traction vehicle 40 respectively;
(4) connecting the force sensor 3 with a data processing device 4 (shown in fig. 6), wherein the data processing device 4 is used for displaying the value detected by the force sensor 3, or the data processing device 4 compares the value detected by the force sensor 3 with the gliding force and displays the comparison result;
(5) applying only parking brake to the vehicle 30 to be tested;
(6) starting the traction vehicle 40 to operate;
(7) judging whether the vehicle 30 to be measured moves or not in the process that the force detected by the force sensor 3 is smaller than the downward sliding force; if the parking brake is moved, the parking brake performance does not reach the standard; if the parking brake is not moved, the parking brake performance reaches the standard.
Example two
The embodiment provides a testing method, and the rail vehicle parking brake performance testing system provided by the embodiment is adopted.
Fig. 7 is a flowchart of a method for testing parking brake performance of a rail vehicle according to a second embodiment of the present invention. The testing method provided by the embodiment can be executed by a data processing device, and the data processing device is connected with the force sensor. As shown in fig. 7, the testing method provided by this embodiment includes the following steps:
The motion state of the vehicle to be tested on the straight track comprises the following steps: a stationary state and a moving state. Whether the vehicle to be detected moves or not can be detected by arranging a position sensor, a photoelectric switch and the like.
For example, a photoelectric switch is arranged to detect whether the vehicle to be detected moves, and the photoelectric switch is connected with the data processing device and sends switching value data to the data processing device in real time. The data processing device judges whether the switching value data sent by the photoelectric switch generates jumping, if the jumping occurs, the vehicle to be tested moves, namely: is in a moving state.
And step 702, when the vehicle to be detected is in a moving state, the data processing device acquires the traction force detected by the force sensor.
The set glide force is calculated from a plurality of ramp angles and/or wind forces and stored in a data processing device.
And step 704, the data processing device judges that the parking brake performance of the vehicle to be tested does not reach the standard.
The technical scheme that this embodiment provided, through adopting above-mentioned test system, adopt first connecting piece to link to each other with the vehicle that awaits measuring, the second connecting piece links to each other with the draw gear who is used for providing traction force, first connecting piece and second connecting piece link to each other and first connecting piece and second connecting piece set up force sensor, force sensor is used for detecting the second connecting piece and applies the force to first connecting piece under the effect of above-mentioned traction force, when the power that force sensor detected is in the within range of setting for glide force, if the vehicle that awaits measuring takes place to remove, then judge that the performance of parking braking is not up to standard. The method obtains various set gliding forces according to different ramp angles or wind power calculation, and can achieve the effect of testing the parking brake performance of the vehicle to be tested under various ramp angles or wind power conditions, thereby widening the test range and solving the problems in the prior art. The device is simple in structure, low in manufacturing cost and testing cost, and capable of testing vehicles to be tested by placing the vehicles on a horizontal plane without being parked on a ramp.
Further, the set sliding force can be calculated by the following formula:
F＝mgsinθ+fcosθ，
wherein F is the set gliding force, m is the total mass of the vehicle to be measured, g is the gravity acceleration, theta is the set ramp angle, and F is the maximum wind power.
In addition to the above-mentioned solutions provided in this embodiment, other testing methods may also be adopted, such as:
a display device is used in connection with the force sensor 3 for displaying the pulling force detected by the force sensor 3. The operator compares the data displayed by the display device with the set glide force. And when the pulling force that force sensor detected is less than the gliding force of setting, operating personnel observes the vehicle that awaits measuring and whether takes place to remove, and then judges whether parking brake performance is up to standard.
Specifically, the wheel of the vehicle to be tested can be marked so as to observe whether the vehicle to be tested moves or not.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically connected, electrically connected or can communicate with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. A rail vehicle parking brake performance testing system, comprising: the device comprises a first connecting piece, a second connecting piece, a force sensor and a traction device; wherein the content of the first and second substances,
the first connecting piece is used for being connected with a vehicle to be tested, the second connecting piece is used for being connected with a traction device, and the traction device is used for providing traction force for the second connecting piece; the first connecting piece is also connected with the second connecting piece; the force sensor is arranged between the first connecting piece and the second connecting piece and used for detecting the force applied to the first connecting piece by the second connecting piece under the action of the traction force; when the vehicle to be tested moves, if the force detected by the force sensor is less than or equal to the set sliding force, the parking brake performance of the vehicle to be tested does not reach the standard;
the first connecting piece comprises a first coupler connecting part and a first connecting part which are detachably connected, and the first coupler connecting part is used for being connected with a coupler of the vehicle to be tested;
the second coupling includes a second coupler coupling portion for coupling with a coupler of the towing vehicle and a second coupling portion;
the first connecting portion is connected with the second connecting portion, and the force sensor is arranged between the first connecting portion and the second connecting portion.
2. The rail vehicle parking brake performance testing system of claim 1, wherein the second connection portion comprises: the force applying base part and the second installation parts are respectively arranged at two ends of the force applying base part, and the end parts of the second installation parts are fixed on the second coupler connecting part;
the first connection portion includes: the device comprises a stress base and first installation parts respectively arranged at two ends of the stress base; the first installation part arranged at one end of the force bearing base part penetrates through a region surrounded by the force application base part, the second installation parts arranged at two ends of the force application base part and the second coupler connection part; the end parts of the first mounting parts arranged at the two ends of the stressed base part are detachably connected with the first coupler connecting part;
the force sensor is disposed between the force receiving base and the force applying base.
3. The rail vehicle parking brake performance testing system of claim 2, wherein the first mounting portions at both ends of the stressed base are perpendicular to the stressed base.
4. The rail vehicle parking brake performance testing system of claim 3, wherein the second mounting portions at both ends of the apply base are perpendicular to the apply base.
5. The rail vehicle parking brake performance testing system of any one of claims 2-4, wherein the first coupler attachment portion and the end of the first mounting portion are each provided with bolt holes.
6. The rail vehicle parking brake performance testing system of claim 1, wherein the towing attachment is a towing vehicle.
7. The rail vehicle parking brake performance testing system of claim 1, wherein the second coupler engagement portion and the second engagement portion are integrally formed.
8. A test method using the rail vehicle parking brake performance test system of any one of claims 1 to 7, comprising:
acquiring the motion state of a vehicle to be detected on a straight track;
when the vehicle to be detected is in a moving state, acquiring traction force detected by a force sensor;
when the traction force is smaller than or equal to a set sliding force, judging that the braking performance of the vehicle to be tested does not reach the standard;
the set glide force is calculated by the following formula:
F＝mgsinθ+fcosθ，
wherein F is the set gliding force, m is the total mass of the vehicle to be measured, g is the gravity acceleration, theta is the set ramp angle, and F is the maximum wind power.
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| CN109187057B (en) * | 2018-11-02 | 2024-04-12 | 中车浦镇阿尔斯通运输系统有限公司 | Method for checking parking brake capability |
| CN112326277A (en) * | 2020-11-05 | 2021-02-05 | 北京城市轨道交通咨询有限公司 | Train testing method and device, computer equipment and storage medium |
| CN112857623B (en) * | 2021-01-11 | 2023-04-07 | 中车制动系统有限公司 | Pulling pressure sensor for car coupler and car coupler buffering device |
| CN116481837B (en) * | 2023-05-18 | 2024-04-19 | 襄阳达安汽车检测中心有限公司 | Auxiliary trolley for semitrailer parking brake test and test method |
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