Bridge crossing device and transfer device of railway maintenance vehicle set and railway maintenance vehicle set

Abstract

The utility model provides a bridge crossing device and a transfer device of a railway maintenance vehicle set and the railway maintenance vehicle set. The gap bridge device comprises a swing arm and a clamping plate, the clamping plate is fixed to one end of the swing arm, and the other end of the swing arm is connected with a first transfer device rail. One end of the telescopic piece is connected with the swing arm, and the other end of the telescopic piece is connected with a carriage of the first transfer device rail; the baffle is provided with a clamping groove and is fixed at the end part of the second transfer device track; the telescopic piece extends to drive the swing arm to swing until the clamping plate abuts against the clamping groove of the baffle and reaches preset pressure, the telescopic piece is locked, and the swing arm is connected with the first transfer device rail and the second transfer device rail. The gap bridge device solves the technical problems that a traditional gap bridge device is complex in structure and inconvenient to operate.

Description

Technical Field

[0001] This application relates to the technical field of railway maintenance train sets, specifically to a bridge device, a transfer device, and a railway maintenance train set. Background Technology

[0002] During railway maintenance, tracks are laid on the railway maintenance trains to allow the traveling crane to operate. Since there are gaps between the train cars, track connecting devices, such as bridge tracks, are used to connect the tracks on adjacent cars to ensure the traveling crane can operate continuously and smoothly, thus guaranteeing the smooth progress of maintenance work.

[0003] During railway maintenance, materials and equipment are transferred from car A to car B. Due to the characteristics of railway lines such as curves, the inner and outer rails of the gantry crane at the connection point between the two cars are telescopic and extended. At the same time, it is necessary to ensure that the gantry crane can carry heavy objects smoothly through the bridge device at the connection point between the two cars.

[0004] Currently, the conditions for transporting machinery and materials at railway construction sites are poor, making handling difficult and mostly relying on manual labor. Railway maintenance train sets primarily address this issue, integrating the carrying and hoisting of machinery and materials with the maintenance workshop. The hoisting of various machinery and materials from the material depot to the work workshop requires the transfer device's track to adapt to various track conditions, including curves, superelevations, and gradients. Furthermore, during operations, the transfer device must adapt to changing track conditions, enabling it to move back and forth between two carriages on various tracks.

[0005] Currently, there are no practical application cases for this solution. Related patents mainly focus on the layout of the entire vehicle, and there are no separate patents specifically for the transfer device and bridge mechanism. Domestic patent CN118183476A, "A Bridge Track Device and a Bridge Track Device for Railway Maintenance Train Sets," uses a hinged design at one end, with a protruding transition track plate forming a finger-shaped plate structure with the fixed end track plate. During train travel and operation, deflection and extension at a certain angle are achieved mainly through the hinge point and the gap between the finger-shaped plates. Its adaptability is limited, and repeated collisions and friction during operation pose certain risks. In other words, it suffers from technical problems such as complex structure, inconvenient operation, and limited adaptability.

[0006] The information disclosed in the background section is only intended to enhance the understanding of the background of this application, and therefore may contain information that is not part of the prior art known to those skilled in the art. Utility Model Content

[0007] This application provides a new type of railway maintenance trainset, including a bridge device, a transfer device, and the railway maintenance trainset itself.

[0008] According to a first aspect of the embodiments of this application, a bridge-crossing device for a railway maintenance car group is provided, wherein a first transfer device track and a second transfer device track are fixed to the outer roof of adjacent cars of the railway maintenance car group; the bridge-crossing device includes:

[0009] A swing arm and a clamping plate, wherein one end of the swing arm is fixed to the clamping plate and the other end of the swing arm is connected to the track of the first transfer device;

[0010] A telescopic component, one end of which is connected to the swing arm, and the other end of which is connected to the carriage of the first transfer device track;

[0011] A baffle with a slot is fixed to the end of the track of the second transfer device;

[0012] The telescopic component extends and drives the swing arm to swing until the card plate abuts against the slot of the baffle and reaches a preset pressure, at which point the telescopic component locks, and the swing arm connects to the first transfer device track and the second transfer device track.

[0013] According to a second aspect of the embodiments of this application, a transfer device for railway maintenance train sets is provided, comprising:

[0014] Multiple sets of running wheelsets, each set of running wheelsets has two running wheels spaced apart, and the center distance a1 between the two running wheels of the same running wheelet set is greater than the preset gap L between the swing arm and the track of the second transfer device.

[0015] According to a third aspect of the embodiments of this application, a road maintenance vehicle group is provided, comprising:

[0016] The aforementioned bridge crossing device;

[0017] The aforementioned transfer device.

[0018] The embodiments of this application, by adopting the above technical solutions, have the following technical effects:

[0019] When it is necessary to separate the connected first transfer device track and second transfer device track, the working process is as follows:

[0020] The retraction of the telescopic component causes the swing arm to swing back until the clamping plate leaves the slot of the baffle and reaches a preset position, at which point the telescopic component locks again. There is a gap between the first and second transfer device tracks. The preset position setting is the locking condition for the telescopic component's retraction, ensuring that the telescopic component, swing arm, and clamping plate stop at the preset position, minimizing the impact on other structures and avoiding collisions.

[0021] The bridge device for railway maintenance train sets disclosed in this application has a simple structure and is easy to operate, and can easily realize the connection and disconnection between the first transfer device track and the second transfer device track. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0023] Figure 1 This is a schematic diagram of the bridge device of the railway maintenance train set installed on the first transfer device track and the second transfer device track according to an embodiment of this application;

[0024] Figure 2 This is a schematic diagram of the bridge device for a railway maintenance train set according to an embodiment of this application, connecting the first transfer device track and the second transfer device track on a curved section;

[0025] Figure 3 This is a schematic diagram showing the fixing of the swing arm and the clamping plate of the bridge device for the railway maintenance train set according to an embodiment of this application;

[0026] Figure 4 This is a schematic diagram of the baffle 5 of the bridge device for a railway maintenance train set according to an embodiment of this application;

[0027] Figure 5 This is a schematic diagram of the transfer device for railway maintenance train sets according to an embodiment of this application;

[0028] Figure 6 This is a schematic diagram of the side guide device of the transfer device for railway maintenance train sets according to an embodiment of this application.

[0029] Figure label:

[0030] The first transfer device consists of: track 1, telescopic component 2, swing arm 3, clamping plate 4, and chamfer 41.

[0031] Baffle 5, baffle chamfer 51, second transfer device track 6

[0032] Transfer device 9, side guide device 91, elastic suspension structure 911, running wheel 92. Detailed Implementation

[0033] To make the technical solutions and advantages of the embodiments of this application clearer, the exemplary embodiments of this application will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0034] Example 1

[0035] like Figure 1 and Figure 2As shown, in this embodiment of the railway maintenance car group's bridge device, the first transfer device track 1 and the second transfer device track 6 are fixed to the outer roof of adjacent carriages of the railway maintenance car group. The bridge device for the railway maintenance car group in this embodiment includes:

[0036] The swing arm 3 and the clamping plate 4 are provided. One end of the swing arm 3 is fixed to the clamping plate 4 and the other end of the swing arm is connected to the first transfer device track 1, which may be hinged.

[0037] Telescopic component 2, one end of which is connected to the swing arm 3 by a hinge, and the other end is connected to the carriage of the first transfer device track 1;

[0038] A baffle 5 with a slot is fixed to the end of the track 6 of the second transfer device;

[0039] The telescopic component extends and drives the swing arm 3 to swing until the card plate 4 abuts against the slot of the baffle 5 and reaches a preset pressure. At this point, the telescopic component locks, and the swing arm 3 connects to the first transfer device track 1 and the second transfer device track 6.

[0040] A first transfer device track and a second transfer device track are fixed to the outer roof of adjacent carriages of a railway maintenance car unit, respectively. In this embodiment, a bridging device is installed at the first and second transfer device tracks, connecting them. This allows the transfer device of the railway maintenance car unit to move on the first transfer device track, the bridging device, and the second transfer device track.

[0041] The railway maintenance train crossing device of this application has a swing arm 3 with a card plate 4 fixed at one end and the other end of the swing arm hinged to the first transfer device track 1; one end of the telescopic member 2 is hinged to the swing arm 3 and the other end is connected to the carriage of the first transfer device track 1; and a baffle 5 with a slot is fixed to the end of the second transfer device track 6.

[0042] When a bridging device is needed to connect the first transfer device track 1 and the second transfer device track 2, the working process is as follows:

[0043] The telescopic component 2 extends, causing the swing arm 3 to swing until the locking plate 4 abuts against the slot of the baffle 5 and reaches a preset pressure. At this point, the telescopic component 2 locks, and the swing arm 3 connects the first transfer device track 1 and the second transfer device track 6. The preset pressure setting is the locking condition for the extension of the telescopic component 2, thus ensuring the strength of the connection between the first transfer device track 1 and the second transfer device track 2 by the bridge-crossing device.

[0044] When it is necessary to separate the connected first transfer device track 1 and second transfer device track 2, the working process is as follows:

[0045] The retraction of telescopic component 2 causes the swing arm 3 to swing back until the locking plate 4 leaves the slot of the baffle 5 and reaches the preset position, at which point the telescopic component 2 locks again. There is a gap between the first transfer device track 1 and the second transfer device track 6. The preset position setting is the locking condition for the retraction of telescopic component 2, thus ensuring that telescopic component 2, swing arm 3, and locking plate 4 stop at the preset position, minimizing the impact on other structures and avoiding collisions.

[0046] The bridge device for railway maintenance train sets in this application has a simple structure and is easy to operate, and can easily realize the connection and disconnection between the first transfer device track 1 and the second transfer device track 6.

[0047] When the railway maintenance train is traveling (i.e., in non-operational condition), the swing arm 3 is opened, disconnecting the material transfer device tracks (first transfer device track 1 and second transfer device track 6) between the two carriages of the railway maintenance train, ensuring that the transfer device tracks of the two carriages will not collide or interfere with each other when passing through any section of the track during travel. In the operating condition of the railway maintenance train, the bridge device connects the first transfer device track 1 and the second transfer device track 6, enabling material hoisting and transfer on various lines.

[0048] On straight sections of road, after the bridge section is installed, the running surfaces of the first transfer device track 1 and the second transfer device track 6 are aligned, and the side guide surfaces of the first transfer device track 1 and the second transfer device track 6 are also aligned.

[0049] During implementation, such as Figure 1 and Figure 2 As shown, the card plate 4 abuts against the slot of the baffle 5 to reach a preset pressure, the telescopic member is locked in position, and a preset gap L is maintained between the swing arm 3 and the second transfer device track 6.

[0050] At this point, there is no contact between the swing arm 3 and the second transfer device track 6, but a preset gap is maintained. In this way, during the extension and retraction of the telescopic component 2, the swing arm 3 and the second transfer device track 6 always maintain a certain distance, avoiding collision between the swing arm 3 and the second transfer device track 6.

[0051] To ensure that the swing arm 3 can be connected with the B-car transfer device track (second transfer device track 6) on both curved and straight sections to form a track that allows smooth passage through the transfer device, a certain gap L is reserved between the swing arm 3 and the end of the B-car track. This gap can accommodate the extension and retraction of the coupler connecting the railway maintenance train set and the contraction of the inner rail and extension of the outer rail of the transfer device track when passing through curves.

[0052] During implementation, such as Figure 4 As shown, the slot is U-shaped, and the opening of the slot faces the second transfer device track 6.

[0053] In this way, the extension of the telescopic component 2 causes the swing arm 3 to swing until the card plate 4 abuts against the card slot of the baffle 5 and reaches the preset pressure, at which point the slot opening plays a role in avoiding collision.

[0054] Specifically, the telescopic component 2 extends and drives the swing arm 3 to swing until the card plate 4 abuts against the card slot of the baffle 5 and reaches the preset pressure, and a distance is maintained between the card plate 4 and the bottom of the card slot.

[0055] In this way, the force between the clamping plate 4 and the baffle 5 is mainly in the vertical direction, and will not exert additional force on the second transfer device track 6, thus reducing the impact of the bridge device on the second transfer device track 6. If the bridge device malfunctions and needs to be repaired or its parts replaced, the replacement is easier and less costly.

[0056] During implementation, such as Figure 4 As shown, the side of the slot of the baffle 5 facing the card plate 4 has a baffle chamfer 51, which forms a flared opening to facilitate the alignment of the card plate 4.

[0057] The flared design makes it easier to align the four card plates.

[0058] Specifically, the horn opening 51 is located at the middle position on the side of the slot of the baffle 5 facing the card plate 4.

[0059] To ensure that the swing arm 3 can bear load well during operation, the bridge crossing device baffle 5 is designed with a slot with a flared opening in the middle. When the swing arm 3 approaches the baffle 5, the clamping plate 4 on the swing arm 3 gradually enters the slot on the baffle. When the transfer device passes the swing arm 3, the swing arm 3 transfers part of the load to the baffle 5 through the clamping plate 4, thus improving the load condition of the swing arm 3.

[0060] During implementation, such as Figure 3 As shown, the side of the card plate 4 facing the slot of the baffle 5 has a card plate chamfer 41;

[0061] The shape of the chamfer 51 of the baffle matches the shape of the chamfer 41 of the card plate.

[0062] This ensures that the two fit together tightly and that the force is evenly distributed between them.

[0063] In order to make the swing arm 3, the first transfer device track 1, and the second transfer device track 6 overlap into a track with a relatively smooth outline, the contact surface between the baffle 5 and the swing arm 3 has been chamfered multiple times, so that the swing arm 3 and the baffle 5 can form a relatively smooth track after overlapping on different lines or curves.

[0064] In practice, the telescopic component 2 is a hydraulic cylinder.

[0065] 1) When not in operation, the cylinder retracts, the hydraulic lock locks, and the swing arm 3 forms a certain angle with the A car transfer device track (i.e., the first transfer device track 1) and is separated from the B car transfer device track (the second transfer device track 2) by a certain gap, so that the railway maintenance train can pass smoothly through any line operation without interference.

[0066] 2) During operation, the hydraulic cylinder of the bridge crossing device extends, and the swing arm 3 gradually approaches the baffle 5. When the swing arm 3 contacts the baffle 5 and reaches the preset pressure, the hydraulic cylinder stops extending and retracting, and the hydraulic lock locks. At this time, the bridge crossing device connects with the A-car transfer device track (i.e., the first transfer device track 1) and the B-car transfer device track (the second transfer device track 2) to form a track that allows smooth passage through the transfer device.

[0067] Example 2

[0068] The railway maintenance car group transfer device in this application embodiment, such as Figure 5 As shown, it includes:

[0069] Multiple running wheel pairs, each running wheel pair having two running wheels 92 spaced apart, the center distance a1 between the two running wheels 92 of the same running wheel pair being greater than the preset gap L between the swing arm 3 and the second transfer device track 6.

[0070] During implementation, such as Figure 5 As shown, the transfer device 9 also includes:

[0071] The side guide device 91 has multiple side guide wheel pairs, each side guide wheel pair has two side guide wheels spaced apart, and the center distance a2 between the two side guide wheels of the same side guide wheel pair is greater than the preset gap L between the swing arm 3 and the second transfer device track 6.

[0072] To accommodate the angle formed between the swing arm 3 of the bridge-crossing device and the tracks of both the A-car and B-car transfer devices on curved sections, as well as the shortening of the inner rail, the lengthening of the outer rail, and the certain gap between the end of the swing arm and the end of the B-car track, the traveling wheels and side guide devices of the transfer device are all paired structures. Furthermore, the center distance a1 between the two traveling wheels of the same pair and the center distance a2 between the two side guide wheels of the same pair are greater than the reserved gap L between the swing arm and the end of the B-car track (the second transfer device track 6). This ensures that the transfer device does not become unstable due to suspension when passing over the bridge-crossing device, preventing instability in its traveling or side guide center of gravity.

[0073] like Figure 6 As shown, the side guide device also includes an elastic suspension structure 911, which connects to the side guide wheelset. When the track gauge of the bridge crossing device changes, the elastic suspension structure 911 allows the side guide wheels to synchronously compress or reset to adapt to the changing track gauge.

[0074] To accommodate the changes in track gauge at the bridge crossing point on curved sections, the side guide wheels adopt an elastic suspension structure 911, which allows for a certain amount of extension and retraction along the track gauge direction. Each pair of side guide wheels can adapt to changes in track gauge, ensuring that the transfer device can be smoothly guided through the bridge crossing point on curved sections.

[0075] To facilitate power supply and adapt to different line curves, the transfer device uses a spring-loaded cable reel for power supply and is equipped with limit rollers and cable support grooves for cable limiting and guidance. When the transfer device moves, it pulls the cable along the cable support groove. When retracting the cable, the transfer trolley moves back, and the cable reel automatically retracts the cable using spring force.

[0076] The bridge crossing device in Embodiment 1 and the transfer device in Embodiment 2 work together. When the railway maintenance train is traveling (i.e., in non-operational conditions), the swing arm 3 is opened to disconnect the transfer device tracks (first transfer device track 1 and second transfer device track 6) of the materials in the two carriages of the railway maintenance train, ensuring that the transfer device tracks of the two cars will not collide or interfere with each other when passing through any section of the road during the journey.

[0077] During parking operations, the swing arm 3 of the overpass device swings and connects with the track of the transfer device to form a certain angle and gap. The material transfer device can smoothly hoist and reciprocate within the two carriages of the train set through a pair of traveling wheels with a certain center distance and retractable side guide wheels. It can operate on curves with a minimum radius of R145m.

[0078] Example 3

[0079] The railway maintenance train set of this application includes the bridge crossing device described in Embodiment 1 and the transfer device described in Embodiment 2.

[0080] This application has the following advantages:

[0081] In this invention, during non-operational conditions, the bridge crossing device is disconnected from the first transfer device track 1 and the second transfer device track 6. The disconnection distance ensures that there is no interference under various operating conditions such as coupler extension and retraction, track curves, slopes, and superelevation, ensuring smooth train operation.

[0082] During operation, the swing arm 3 of the overpass device rotates, forming a relatively smooth track outline with the A / B vehicle track (i.e., the first transfer device track 1 and the second transfer device track 6) on the outside of the traveling wheels and side guide wheels of the transfer device; at the same time, a certain gap is reserved between the end of the overpass device and the end of the vehicle track, which can ensure that there is no interference between the overpass device and the A / B vehicle track (i.e., the first transfer device track 1 and the second transfer device track 6) in various working conditions such as curves, superelevation and slopes, and can adapt to working conditions such as the extension and contraction of the inner and outer rails and the angle deflection.

[0083] When the swing arm 3 of the bridge crossing device overlaps with the B-car track (i.e., the second transfer device track 6), the locking plate and the baffle horn-mouth locking groove cooperate to prevent the swing arm 3 from becoming a cantilever structure bearing, which helps to improve the load condition of the bridge crossing device.

[0084] To accommodate the varying track conditions (curves, ramps, superelevations, etc.) and the resulting gaps between the bridge crossing device and the A / B trains, where the track gauge of the transfer device changes, the traveling wheelsets and side guide wheelsets of the transfer device are arranged in pairs. The center distance a1 between the two traveling wheels of the same traveling wheelset and the center distance a2 between the two side guide wheels of the same side guide wheelset are greater than the reserved gap L between the swing arm and the end of the B train track (second transfer device track 6). The side guide wheelsets are suspended and can extend or retract a certain amount along the side guide direction to adapt to the changing track gauge at the bridge crossing device, ensuring smooth travel and guidance of the transfer device.

[0085] To accommodate different curved routes, a spring-loaded cable reel is used for power supply, and limit rollers and cable trays are installed for cable positioning and guidance. When the transfer device moves, it pulls the cable along the cable tray. When retracting the cable, the transfer trolley moves back, and the cable reel automatically retracts the cable using spring force.

[0086] In the description of this application and its embodiments, it should be understood that the terms "top", "bottom", "height", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0087] In this application and its embodiments, unless otherwise expressly specified and limited, the terms "set," "install," "connect," "link," "fix," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0088] In this application and its embodiments, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0089] The foregoing disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described above. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0090] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0091] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A bridge crossing device for a railway maintenance vehicle, characterized in that The first transfer device track (1) and the second transfer device track (6) are fixed to the outer roof of adjacent carriages of the railway maintenance car group; the bridge device includes: A swing arm (3) and a clamping plate (4), one end of the swing arm (3) is fixed to the clamping plate (4) and the other end of the swing arm is connected to the track (1) of the first transfer device; Telescopic component (2), one end of which is connected to the swing arm (3) and the other end is connected to the carriage of the first transfer device track (1); A baffle (5) with a slot is fixed to the end of the second transfer device track (6); The telescopic component extends and drives the swing arm (3) to swing until the card plate (4) abuts against the slot of the baffle (5) and reaches the preset pressure. Then the telescopic component locks, and the swing arm (3) connects the first transfer device track (1) and the second transfer device track (6).

2. The bridge device of claim 1, wherein The card plate (4) abuts against the slot of the baffle (5) to reach a preset pressure, the telescopic member is locked in position, and a preset gap L is maintained between the swing arm (3) and the second transfer device track (6).

3. The bridge device of claim 2, wherein, The slot is U-shaped, and the opening of the slot faces the track (6) of the second transfer device.

4. The bridge device of claim 3, wherein, The side of the slot of the baffle (5) facing the card plate (4) has a baffle chamfer (51), and the baffle chamfer (51) is formed to be aligned with the flared mouth.

5. The bridge device of claim 4, wherein, The card plate (4) has a card plate chamfer (41) on the side facing the card slot of the baffle (5); The shape of the baffle chamfer (51) and the shape of the card plate chamfer (41) are matched to achieve a tight fit.

6. The bridge device according to any one of claims 1 to 4, characterized in that The telescopic component (2) is a hydraulic cylinder.

7. A transfer device for a railway maintenance vehicle, characterized in that include: Multiple sets of running wheels, each set of running wheels has two running wheels spaced apart, the center distance a1 between the two running wheels of the same running wheel set is greater than the preset gap L between the swing arm (3) and the second transfer device track (6).

8. The transfer device of claim 7, wherein, Also includes: The side guide device has multiple side guide wheel pairs, each side guide wheel pair has two side guide wheels spaced apart, and the center distance a2 between the two side guide wheels of the same side guide wheel pair is greater than the preset gap L between the swing arm (3) and the second transfer device track (6).

9. The transfer device of claim 8, wherein, The side guide device also includes an elastic suspension structure (911) connected to the side guide wheelset.

10. A railway maintenance vehicle train, characterized in that include: The bridge device according to any one of claims 1 to 6; The transfer device according to any one of claims 7 to 9.

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