Railway train and its gauge changing device

Abstract

The application discloses a track train and a track gauge conversion device thereof, and relates to the technical field of track transportation. The track gauge conversion device comprises a track conversion line, a track conversion bogie, a magnetic circuit guide rail, a magnetic circuit coil assembly, a rotary hydraulic cylinder, a distance detection module and an oil supply module. The track conversion bogie can move on the track conversion line. The magnetic circuit coil assembly and the magnetic circuit guide rail repel each other through a magnetic field, so as to unload the load acting on the wheel. The rotary hydraulic cylinder comprises a cylinder body and a piston rod. The distance detection module is used for detecting the distance between the wheel and the center of the axle. The oil supply module is used for supplying oil to the rotary hydraulic cylinder when the distance detected by the corresponding distance detection module is inconsistent with the set track conversion distance, so that the piston rod extends or retracts relative to the cylinder body, and the distance between the wheel and the center of the axle is adjusted. The track gauge conversion device can quickly convert the track without damaging the overall structure of the bogie, greatly reduces the track conversion time, accelerates the operation efficiency of the cross-country train, and reduces the labor and material costs.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rail transit, in particular to a rail gauge conversion device. The present application also relates to a rail train having the rail gauge conversion device. BACKGROUND

[0002] Currently, the main rail gauges in the world are meter gauge 1067mm, broad gauge 1520mm, broad gauge 1676mm, and standard gauge 1435mm. With the development of international railway intermodal transport and the demand of international trade, trains need to complete railway transportation in lines with different rail gauges in different countries. When trains cross borders, the train bogies need to be replaced, resulting in a waste of a large amount of manpower, material resources, and time cost.

[0003] In the existing system, the common rail gauge conversion method mainly designs the wheelset and axle of the bogie to be in an extensible state. Specifically, in the existing disclosed train rail gauge conversion method (for example, CN114454908A), the middle of the axle is disconnected, a piston mechanism is arranged between the wheels, a piston mechanism is arranged between the frame and the clamping seat, the clamping seat adopts a single rail or double rail structure, and the wheelset, the bogie, and the clamping seat are converted to achieve dynamic rail conversion of the train.

[0004] However, in the process of implementing the present application, the inventors found that at least the following problems exist in the prior art:

[0005] Although this method can achieve the purpose of train rail conversion, it destroys the basic structure of the train bogie, affects the stress condition of the bogie during train operation, and affects the safety of train operation.

[0006] Therefore, it is necessary for those skilled in the art to timely provide a rail gauge conversion device capable of not damaging the overall structure of the bogie and quickly converting the rail gauge, and a rail train having the rail gauge conversion device. SUMMARY

[0007] The purpose of the present application is to provide a rail gauge conversion device capable of quickly converting the rail gauge without damaging the overall structure of the bogie. Another purpose of the present application is to provide a rail train comprising the above rail gauge conversion device.

[0008] To achieve the above purpose, the present application provides a rail gauge conversion device, comprising:

[0009] a rail conversion line;

[0010] a rail conversion bogie, the rail conversion bogie being provided with an axle and a wheel, and the rail conversion bogie being movable on the rail conversion line through the wheel;

[0011] a magnetic circuit guide rail, the magnetic circuit guide rail being fixed to the rail conversion line;

[0012] The magnetic circuit coil assembly is installed on the variable-gauge bogie, and the magnetic circuit coil assembly and the magnetic circuit guide rail repel each other through a magnetic field to unload the load acting on the wheel;

[0013] The rotating hydraulic cylinder comprises a cylinder body connected with the axle and a piston rod sleeved on the axle and connected with the wheel;

[0014] The distance detection modules are distributed at intervals in the center of the variable-gauge track to detect the distance between the wheel and the center of the axle;

[0015] The oil supply module is connected with the distance detection modules and the rotating hydraulic cylinder to supply oil to the rotating hydraulic cylinder when the distance detected by the corresponding distance detection module is inconsistent with the set variable-gauge distance, so that the piston rod extends or retracts relative to the cylinder body, and the distance between the wheel and the center of the axle is adjusted.

[0016] In some embodiments, the rotating hydraulic cylinder further comprises:

[0017] The end cover is provided with a retracting oil nozzle and an extending oil nozzle, the retracting oil nozzle is connected with the oil supply module through a retracting oil supply pipe, and the extending oil nozzle is connected with the oil supply module through an extending oil supply pipe;

[0018] The piston cover is connected with the cylinder body to form a retracting closed chamber between the piston cover and the piston rod and an extending closed chamber between the piston rod and the cylinder body;

[0019] The rotating sleeve is arranged between the piston cover and the end cover, and the rotating sleeve is connected with the piston cover in an interference fit, the rotating sleeve can rotate relative to the end cover, and the rotating sleeve is provided with a retracting oil passage and an extending oil passage;

[0020] The inside of the piston cover is provided with a retracting oil channel, the retracting oil channel is communicated with the retracting oil passage, so that the hydraulic oil in the retracting oil nozzle flows into the retracting closed chamber through the retracting oil passage and the retracting oil channel, and the piston rod is retracted; the inside of the piston cover and the cylinder body is provided with a communicating extending oil channel, the extending oil channel is communicated with the extending oil passage, so that the hydraulic oil in the extending oil nozzle flows into the extending closed chamber through the extending oil passage and the extending oil channel, and the piston rod is extended.

[0021] In some embodiments, the retracting oil passage comprises an inner circle retracting oil groove arranged in the inner circle of the rotating sleeve, an outer circle retracting oil groove arranged in the outer circle of the rotating sleeve, and a retracting oil hole communicating the inner circle retracting oil groove and the outer circle retracting oil groove;

[0022] The extending oil passage comprises an inner circle extending oil groove arranged in the inner circle of the rotating sleeve, an outer circle extending oil groove arranged in the outer circle of the rotating sleeve, and an extending oil hole communicating the inner circle extending oil groove and the outer circle extending oil groove.

[0023] In some embodiments, the rotary hydraulic cylinder further comprises a rotary check ring, which is sleeved on the piston rod and connected with the piston cover to fix the end cover.

[0024] In some embodiments, sealing rings are arranged between the end cover and the piston cover, between the end cover and the rotary sleeve, between the end cover and the rotary check ring, and between the rotary sleeve and the piston cover.

[0025] In some embodiments, a mounting bracket is further included, one end of which is connected to the end cover and the other end of which is connected to the oil supply module, and the retracting oil supply pipe and the extending oil supply pipe are fixed to the mounting bracket.

[0026] In some embodiments, the retracting oil nozzle and the extending oil nozzle are connected to the end cover by threads.

[0027] In some embodiments, a roller assembly arranged on both sides of the magnetic circuit guide rail and a centering guide arm mounted on the variable gauge bogie are further included, the centering guide arm being in rolling contact with the roller assembly to realize the centering of the variable gauge bogie on the variable gauge track.

[0028] In some embodiments, the distance detection module is a laser range finder, and a plurality of laser range finders are distributed equidistantly in the center of the sleepers of the variable gauge track.

[0029] The application further provides a rail train comprising the variable gauge conversion device of any one of the above.

[0030] With respect to the above background technology, the variable gauge conversion device provided by the embodiments of the application comprises a variable gauge track, a variable gauge bogie, a magnetic circuit guide rail, a magnetic circuit coil assembly, a rotary hydraulic cylinder, a plurality of distance detection modules, and an oil supply module. It can be understood that when the variable gauge bogie moves from one end of the variable gauge track to the other end, the magnetic circuit guide rail is energized with the magnetic circuit coil assembly, and through magnetic field repulsion, the load acting on the wheel is transferred to the variable gauge bogie connected with the magnetic circuit coil assembly, thereby realizing wheel unloading. After the wheel is unloaded, the vertical load acting on the connection between the wheel and the axle is reduced, and the relative sliding load at the interference fit between the wheel and the axle is reduced. During the forward movement of the variable gauge bogie, the plurality of distance detection modules measure the relative distance between the wheel center and the axle center in real time, and the oil supply module compares the relative distance measured by the distance detection modules with the system set variable gauge distance. When the gauge is widened, the oil supply module supplies oil to the rotary hydraulic cylinder, so that the piston rod extends relative to the cylinder body, thereby increasing the distance between the wheel center and the axle center; when the gauge is narrowed, the oil supply module supplies oil to the rotary hydraulic cylinder, so that the piston rod retracts relative to the cylinder body, thereby reducing the distance between the wheel center and the axle center.

[0031] In this way, the aforementioned gauge-changing device can achieve rapid gauge changes without damaging the overall structure of the bogie. Specifically, the magnetic circuit guide rail and the magnetic circuit coil assembly installed on the gauge-changing bogie repel each other when energized, realizing the unloading of the load between the wheel and the axle. This improves the ability of the rotating hydraulic cylinder to push the wheel when there is no load between the wheel and the axle. At the same time, through the linkage of the rotating hydraulic cylinder, the oil supply module, and several distance detection modules distributed in the gauge-changing line, the real-time accurate measurement and adjustment of the inner distance of the wheel after unloading is realized. The rotating hydraulic cylinder installed on the axle can realize the extension and shortening of the inner distance of the wheel during the rotation of the axle, thereby achieving the gauge change of the bogie. This significantly reduces the gauge-changing time, shortens the train passage time between different gauges, speeds up the operation efficiency of cross-border trains, and reduces manpower and material costs. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the overall structure of the gauge changing device in the embodiments of this application;

[0034] Figure 2 for Figure 1 A partial structural schematic diagram of the gauge changing device shown.

[0035] Figure 3 for Figure 2 A schematic diagram of the track gauge changing bogie in the track gauge changing device shown.

[0036] Figure 4 for Figure 3 A partial structural schematic diagram of the track-changing bogie shown;

[0037] Figure 5 for Figure 3 A schematic diagram of the wheelset structure in the track-changing bogie shown;

[0038] Figure 6 for Figure 5 A cross-sectional view of the wheelset shown;

[0039] Figure 7 for Figure 3 A schematic diagram of the rotating hydraulic cylinder in the track-changing bogie shown.

[0040] Figure 8 for Figure 7 A cross-sectional view of the rotary hydraulic cylinder shown.

[0041] Figure 9 Fig. 1 is a schematic diagram of a partial structure of a rotary hydraulic cylinder; Figure 8

[0042] Figure 10 Fig. 2 is a schematic diagram of an oil path distribution in the rotary hydraulic cylinder shown in Fig. 1; Figure 8

[0043] Figure 11 Fig. 3 is a schematic diagram of a structure of a rotary sleeve in the rotary hydraulic cylinder shown in Fig. 1. Figure 10

[0044] Wherein:

[0045] 1. A variable gauge bogie; 12. A roller assembly; 13. A magnetic path guide rail; 14. A variable gauge track; 15. A distance detection module;

[0046] 2. A wheel;

[0047] 3. An axle; 31. An axle flange;

[0048] 4. A rotary hydraulic cylinder; 41. A piston rod; 42. A cylinder body; 43. An end cover; 44. An oil supply nozzle; 441. A retracting oil nozzle; 442. An extending oil nozzle; 45. A rotary check ring; 46. A rotary sleeve; 461. A retracting oil hole; 462. An extending oil hole; 47. A bearing; 48. A piston cover; 49. An extending oil path; 50. A sealing ring; 51. A retracting oil path;

[0049] 5. A magnetic path coil assembly;

[0050] 6. A centering guide arm;

[0051] 7. An oil supply module;

[0052] 81. A retracting oil supply pipe; 82. An extending oil supply pipe;

[0053] 9. A mounting bracket. DETAILED DESCRIPTION

[0054] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0055] In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0056] It should be noted that the "upper end, lower end, left side, right side" and other orientation words described below are defined based on the drawings of the specification.​​​

[0057] Please refer to Figures 1 to 11 , Figure 1 It is the overall structure schematic diagram of the track gauge conversion device in the embodiments of the present application; Figure 2 It is Figure 1 The local structure schematic diagram of the track gauge conversion device shown in the figure; Figure 3 It is Figure 2 The structure schematic diagram of the track conversion bogie in the track gauge conversion device shown in the figure; Figure 4 It is Figure 3 The local structure schematic diagram of the track conversion bogie shown in the figure; Figure 5 It is Figure 3 The structure schematic diagram of the wheel set in the track conversion bogie shown in the figure; Figure 6 It is Figure 5 The cross-sectional view of the wheel set shown in the figure; Figure 7 It is Figure 3 The structure schematic diagram of the rotating hydraulic cylinder in the track conversion bogie shown in the figure; Figure 8 It is Figure 7 The cross-sectional view of the rotating hydraulic cylinder shown in the figure; Figure 9 It is Figure 8 The local structure schematic diagram of the rotating hydraulic cylinder shown in the figure; Figure 10 It is Figure 8 The oil distribution schematic diagram of the rotating hydraulic cylinder shown in the figure; Figure 11 It is Figure 10 The structure schematic diagram of the rotating sleeve in the figure.

[0058] The track gauge conversion device provided by the embodiments of the present application comprises a track conversion line 14, a track conversion bogie 1, a magnetic circuit guide rail 13, a magnetic circuit coil assembly 5, a rotating hydraulic cylinder 4, a plurality of distance detection modules 15 and an oil supply module 7.

[0059] The track conversion bogie 1 is provided with a wheel set, specifically, a wheel 2 is in interference fit with an axle 3, the wheel set is installed on the track conversion bogie 1 through an axle box, and the track conversion bogie 1 can move on the track conversion line 14 through the wheel 2.

[0060] The magnetic circuit guide rail 13 is fixed to the track conversion line 14, the magnetic circuit coil assembly 5 is installed on the track conversion bogie 1, and the magnetic circuit coil assembly 5 and the magnetic circuit guide rail 13 repel each other through a magnetic field to unload the load acting on the wheel 2.

[0061] The rotating hydraulic cylinder 4 comprises a cylinder body 42 connected with the axle 3 and a piston rod 41 sleeved on the axle 3 and connected with the wheel 2, the piston rod 41 is sleeved on the axle 3 and is in sliding connection with the axle 3, the cylinder body 42 is fastened with the axle flange 31 through bolts, the piston rod 41 is connected with the wheel 2 through bolts, the cylinder body 42 is sleeved on the outside of the piston rod 41, the cylinder body 42 is in sliding connection with the piston rod 41, and the contact positions of the cylinder body 42 and the piston rod 41 are provided with sealing O-rings.

[0062] Several distance detection modules 15 are spaced apart in the center of the track changing line 14 to detect the distance between the center of the wheel 2 and the axle 3. The oil supply module 7 is connected to several distance detection modules 15 and the rotary hydraulic cylinder 4 to supply oil to the rotary hydraulic cylinder 4 when the distance detected by the corresponding distance detection module 15 is inconsistent with the set track changing distance, so that the piston rod 41 extends or retracts relative to the cylinder body 42, thereby realizing the adjustment of the distance between the center of the wheel 2 and the axle 3.

[0063] Of course, depending on actual needs, the aforementioned distance detection module 15 is a laser rangefinder, and several laser rangefinders are distributed at equal intervals in the center of the sleepers of the track change line 14.

[0064] Understandably, when the bogie 1 moves from one end of the track change line 14 to the other, the magnetic circuit guide rail 13 and the magnetic circuit coil assembly 5 are energized. Through magnetic field repulsion, the load acting on the wheel 2 is transferred to the bogie 1 connected to the magnetic circuit coil assembly 5, thereby unloading the wheel 2.

[0065] It should be noted that the magnetic circuit coil assembly 5 includes a magnetic circuit coil mounting plate and a magnetic coil mounted on the magnetic circuit coil mounting plate. The magnetic circuit coil mounting plate is symmetrically mounted on the bottom of the variable track bogie 1 by bolts. The variable track bogie 1 moves forward on the variable track line 14. The magnetic circuit guide rail 13 is energized with the magnetic coil on the magnetic circuit coil mounting plate. Through magnetic field repulsion, the load acting on the wheel 2 is transferred to the variable track bogie 1 connected to the magnetic circuit coil mounting plate, thereby unloading the wheel 2.

[0066] The track-changing line 14 is approximately 10 meters long and accommodates a single track-changing bogie 1 for the entire train. After wheel 2 is unloaded, the remaining power bogies provide the power for the current track-changing bogie 1 to move forward. When wheel 2 moves forward after being unloaded, the vertical load on the connection between wheel 2 and axle 3 decreases, and the relative sliding load at the interference fit between wheel 2 and axle 3 decreases. During the forward movement of track-changing bogie 1, several distance detection modules 15 measure the relative distance between the center of wheel 2 and axle 3 in real time. The oil supply module 7 compares the relative distance measured by the distance detection modules 15 with the track-changing distance set by the system.

[0067] When the track gauge widens, the oil supply module 7 supplies oil to the rotary hydraulic cylinder 4, causing the piston rod 41 to extend relative to the cylinder body 42, thereby increasing the distance between the center of the wheel 2 and the axle 3; when the track gauge narrows, the oil supply module 7 supplies oil to the rotary hydraulic cylinder 4, causing the piston rod 41 to retract relative to the cylinder body 42, thereby shortening the distance between the center of the wheel 2 and the axle 3.

[0068] Thus, by using the above-mentioned gauge conversion device, the bogie can be quickly converted without damaging the overall structure of the bogie. Specifically, the magnetic circuit guide rail 13 and the magnetic circuit coil assembly 5 installed on the gauge conversion bogie 1 repel each other after being energized, thereby achieving load unloading between the wheel 2 and the axle 3, improving the ability of the rotating hydraulic cylinder 4 to push the wheel 2 under the load-free state between the wheel 2 and the axle 3. At the same time, through the linkage of the rotating hydraulic cylinder 4, the oil supply module 7, and the distance detection module 15 distributed in the gauge conversion track 14, real-time and accurate measurement and adjustment of the inside distance of the wheel 2 after unloading are achieved. The rotating hydraulic cylinder 4 installed on the axle 3 can elongate and shorten the inside distance of the wheel 2 during the rotation of the axle 3, thereby achieving the conversion of the bogie, greatly reducing the conversion time, shortening the passing time of the train between different gauges, accelerating the operation efficiency of the cross-country train, and reducing the cost of manpower and resources.

[0069] In some embodiments, the gauge conversion device further comprises a roller assembly 12 arranged on both sides of the magnetic circuit guide rail 13 and a centering guide arm 6 installed on the gauge conversion bogie 1. The centering guide arm 6 is symmetrically installed on both sides of the gauge conversion bogie 1 by bolts, and the centering guide arm 6 is in rolling contact with the roller assembly 12 to realize the centering of the gauge conversion bogie 1 during movement on the gauge conversion track 14.

[0070] When the gauge conversion bogie 1 moves from one end to the other end of the gauge conversion track 14, the centering guide arm 6 installed on the gauge conversion bogie 1 is in opposite rolling contact with the roller assembly 12 arranged on both sides of the magnetic circuit guide rail 13, thereby realizing the centering of the gauge conversion bogie 1 on the gauge conversion track 14.

[0071] The roller assembly 12 installed on both sides of the magnetic circuit guide rail 13 and the centering guide arm 6 installed on both ends of the gauge conversion bogie 1 realize the centering of the bogie twice, thereby improving the measurement accuracy of the laser range finder installed at the center of the gauge conversion track 14 during the movement of the wheel 2.

[0072] It should be noted that, according to the wheel pair arrangement on the gauge conversion bogie 1, the rotating hydraulic cylinder 4 is arranged one-to-one with the wheel 2, that is, two rotating hydraulic cylinders 4 are arranged on one axle 3, and the two rotating hydraulic cylinders 4 are respectively connected with the wheels 2 on both sides. This can realize bidirectional gauge conversion of the train, shorten the passing time of the train between different gauges, accelerate the operation efficiency of the cross-country train, and reduce the cost of manpower and resources.

[0073] In some embodiments, the rotating hydraulic cylinder 4 further comprises an end cover 43, a piston cover 48, and a rotating sleeve 46.

[0074] The end cover 43 is provided with an oil supply nozzle 44. Specifically, the oil supply nozzle 44 comprises a retracting oil nozzle 441 and an extending oil nozzle 442. The retracting oil nozzle 441 is connected with the oil supply module 7 through a retracting oil supply pipe 81, and the extending oil nozzle 442 is connected with the oil supply module 7 through an extending oil supply pipe 82.

[0075] The retracting oil nozzle 441 and the extending oil nozzle 442 are both connected to the end cover 43 by screwing.

[0076] The piston cover 48 is connected to the cylinder body 42 by screwing, and the retracting closed chamber is formed between the piston cover 48 and the piston rod 41, and the extending closed chamber is formed between the piston rod 41 and the cylinder body 42.

[0077] The rotating sleeve 46 is arranged between the piston cover 48 and the end cover 43, the bearing 47 is arranged between the end cover 43 and the piston cover 48, the rotating sleeve 46 is connected to the piston cover 48 in interference, the rotating sleeve 46 can rotate relative to the end cover 43, and the retracting oil passage and the extending oil passage are arranged on the rotating sleeve 46.

[0078] The inside of the piston cover 48 is provided with the retracting oil passage 51, the retracting oil passage 51 is communicated with the retracting oil passage, so that the hydraulic oil in the retracting oil nozzle 441 flows into the retracting closed chamber through the retracting oil passage and the retracting oil passage 51, and the retracting of the piston rod 41 is realized; the inside of the piston cover 48 and the cylinder body 42 is provided with the extending oil passage 49 communicated, the extending oil passage 49 is communicated with the extending oil passage, so that the hydraulic oil in the extending oil nozzle 442 flows into the extending closed chamber through the extending oil passage and the extending oil passage 49, and the extending of the piston rod 41 is realized.

[0079] In some embodiments, the retracting oil passage includes the inner circle retracting oil groove arranged in the inner circle of the rotating sleeve 46, the outer circle retracting oil groove arranged in the outer circle of the rotating sleeve 46, and the retracting oil hole 461 communicated between the inner circle retracting oil groove and the outer circle retracting oil groove; correspondingly, the extending oil passage includes the inner circle extending oil groove arranged in the inner circle of the rotating sleeve 46, the outer circle extending oil groove arranged in the outer circle of the rotating sleeve 46, and the extending oil hole 462 communicated between the inner circle extending oil groove and the outer circle extending oil groove.

[0080] That is to say, the inner circle and the outer circle of the rotating sleeve 46 are provided with four oil grooves, and the oil grooves corresponding to the inner circle and the outer circle are communicated through the oil holes.

[0081] In order to fix the end cover 43, the rotating hydraulic cylinder 4 further includes the rotating retaining ring 45, the rotating retaining ring 45 is sleeved on the piston rod 41 and is fastened and connected to the piston cover 48 by screwing, so as to fix the end cover 43.

[0082] In order to ensure the sealing performance of the inner cavity of the cylinder body 42, the sealing ring 50 is arranged between the end cover 43 and the piston cover 48, between the end cover 43 and the rotating sleeve 46, between the end cover 43 and the rotating retaining ring 45, and between the rotating sleeve 46 and the piston cover 48.

[0083] In some embodiments, the track gauge conversion device further comprises a mounting bracket 9, one end of the mounting bracket 9 is connected to the end cover 43, and the other end of the mounting bracket 9 is connected to the bracket of the oil supply module 7, and the retracting oil supply pipe 81 and the extending oil supply pipe 82 are fixed to the mounting bracket 9.

[0084] With the above track gauge conversion device, during the forward movement of the track conversion bogie 1, the laser range finder measures the relative distance between the inner side of the wheel 2 and the center of the axle 3 in real time, and the oil supply module 7 compares the relative distance measured by the laser range finder with the system set track conversion distance; when the track gauge is widened (at this time, the wheel 2 needs to be pushed outward to make the distance between the inner side of the wheel 2 and the center of the axle 3 longer), the oil supply module 7 supplies oil to the extending oil supply pipe 82, the hydraulic oil flows into the extending oil path 49 through the extending oil nozzle 442, the outer circle extending oil groove of the rotating sleeve 46, the extending oil hole 462 and the inner circle extending oil groove, thereby entering the extending sealed chamber of the rotating hydraulic cylinder 4, at the same time, the oil supply module 7 is connected with the retracting oil nozzle 441 through the retracting oil supply pipe 81, thereby connecting the retracting oil path 51, and at the same time, the hydraulic oil in the retracting sealed chamber between the piston cover 48 and the piston rod 41 is sucked, so as to realize the extending of the wheel 2 driven by the piston rod 41; when the track gauge is narrowed (at this time, the wheel 2 needs to be pulled inward to make the distance between the inner side of the wheel 2 and the center of the axle 3 shorter), the oil supply module 7 supplies oil to the retracting oil supply pipe 81, the hydraulic oil flows into the retracting oil path 51 through the retracting oil nozzle 441, the outer circle retracting oil groove of the rotating sleeve 46, the retracting oil hole 461 and the inner circle retracting oil groove, thereby entering the retracting sealed chamber of the rotating hydraulic cylinder 4, so as to realize the shortening of the distance between the wheel 2 and the center of the axle 3.

[0085] After the inner side distance of the two wheels 2 in the track conversion bogie 1 is measured by the laser range finder, the oil supply module 7 stops working, the hydraulic oil in the chamber of the rotating hydraulic cylinder 4 remains relatively static, the coil in the magnetic circuit guide rail 13 and the magnetic circuit coil assembly 5 stops power supply, the bogie is unloaded, the wheel 2 is loaded, and the interference fit between the wheel 2 and the axle 3 is further tightened, so as to realize the bidirectional conversion of the track gauge of the train in the track conversion device, and the track conversion function of the track conversion bogie 1.

[0086] The track conversion device described in the specific embodiments is provided in a track train.

[0087] It should be noted that in the present specification, relational terms such as first and second are used only to distinguish one entity from another, and do not necessarily require or imply that there is any such actual relationship or order between these entities.

[0088] The rail train and the rail gauge conversion device thereof provided by the present application are described in detail above. The principles and implementation manners of the present application are described by using specific examples in the present article, and the above description of the examples is only used to help understand the scheme of the present application and the core idea thereof. It should be pointed out that, for those skilled in the art, some improvements and modifications can be made to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A gauge changing device, characterized in that, include: Track switching line (14); A track-changing bogie (1) is provided, on which an axle (3) and a wheel (2) are mounted. The track-changing bogie (1) can move on the track-changing line (14) via the wheel (2). Magnetic circuit guide rail (13), the magnetic circuit guide rail (13) is fixed to the track changing line (14); Magnetic circuit coil assembly (5), the magnetic circuit coil assembly (5) is installed on the variable track bogie (1), the magnetic circuit coil assembly (5) and the magnetic circuit guide rail (13) repel each other through magnetic field to unload the load acting on the wheel (2); A rotary hydraulic cylinder (4) includes a cylinder body (42) connected to the axle (3) and a piston rod (41) sleeved on the axle (3) and connected to the wheel (2); A plurality of distance detection modules (15) are spaced apart in the center of the track changing line (14) to detect the distance between the wheel (2) and the center of the axle (3); The oil supply module (7) is connected to several distance detection modules (15) and the rotary hydraulic cylinder (4) to supply oil to the rotary hydraulic cylinder (4) when the distance detected by the corresponding distance detection module (15) is inconsistent with the set track change distance, so that the piston rod (41) extends or retracts relative to the cylinder body (42) to realize the distance adjustment between the wheel (2) and the center of the axle (3).

2. The gauge changing device as described in claim 1, characterized in that, The rotary hydraulic cylinder (4) also includes: End cap (43), the end cap (43) is provided with a retractable oil nozzle (441) and an extended oil nozzle (442), the retractable oil nozzle (441) is connected to the oil supply module (7) through a retractable oil supply pipe (81), and the extended oil nozzle (442) is connected to the oil supply module (7) through an extended oil supply pipe (82); A piston cover (48) is connected to the cylinder body (42) so that a retractable sealed chamber is formed between the piston cover (48) and the piston rod (41), and an extended sealed chamber is formed between the piston rod (41) and the cylinder body (42). Rotary sleeve (46) is disposed between piston cover (48) and end cover (43), and the rotary sleeve (46) is interference-fitted with piston cover (48). The rotary sleeve (46) can rotate relative to end cover (43). The rotary sleeve (46) is provided with retractable oil passage and extended oil passage. The piston cover (48) has a retraction oil passage (51) inside, which is connected to the retraction oil passage, so that the hydraulic oil in the retraction nozzle (441) flows into the retraction sealed chamber through the retraction oil passage and the retraction oil passage (51), thereby retracting the piston rod (41). The piston cover (48) and the cylinder (42) have a connecting extension oil passage (49) inside, which is connected to the extension oil passage, so that the hydraulic oil in the extension nozzle (442) flows into the extension sealed chamber through the extension oil passage and the extension oil passage (49), thereby extending the piston rod (41).

3. The gauge changing device as described in claim 2, characterized in that, The retraction oil passage includes an inner ring retraction oil groove located on the inner ring of the rotating sleeve (46), an outer ring retraction oil groove located on the outer ring of the rotating sleeve (46), and a retraction oil hole (461) connecting the inner ring retraction oil groove and the outer ring retraction oil groove. The extended oil passage includes an inner ring extended oil groove located on the inner ring of the rotating sleeve (46), an outer ring extended oil groove located on the outer ring of the rotating sleeve (46), and an extended oil hole (462) connecting the inner ring extended oil groove and the outer ring extended oil groove.

4. The gauge changing device as described in claim 2, characterized in that, The rotary hydraulic cylinder (4) also includes a rotary retaining ring (45), which is sleeved on the piston rod (41) and connected to the piston cover (48) to fix the end cover (43).

5. The gauge changing device as described in claim 4, characterized in that, Sealing rings (50) are provided between the end cap (43) and the piston cap (48), between the end cap (43) and the rotating sleeve (46), between the end cap (43) and the rotating retaining ring (45), and between the rotating sleeve (46) and the piston cap (48).

6. The gauge changing device as described in claim 2, characterized in that, It also includes a mounting bracket (9), one end of which is connected to the end cap (43), and the other end of which is connected to the oil supply module (7). The retractable oil supply pipe (81) and the extended oil supply pipe (82) are fixed on the mounting bracket (9).

7. The gauge changing device as described in claim 2, characterized in that, Both the retractable nozzle (441) and the extended nozzle (442) are threadedly connected to the end cap (43).

8. The gauge changing device as described in any one of claims 1-7, characterized in that, It also includes roller assemblies (12) disposed on both sides of the magnetic circuit guide rail (13) and centering guide arms (6) mounted on the track-changing bogie (1). The centering guide arms (6) make rolling contact with the roller assemblies (12) to achieve centering of the track-changing bogie (1) on the track-changing line (14).

9. The gauge changing device as described in any one of claims 1-7, characterized in that, The distance detection module (15) is a laser rangefinder, and several of the laser rangefinders are distributed at equal intervals in the center of the sleepers of the track changing line (14).

10. A rail train, characterized in that, Includes the gauge changing device as described in any one of claims 1-9.

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