An emergency wheel structure for a high-speed maglev vehicle

Abstract

The present invention discloses an emergency wheel structure of a high-speed maglev vehicle, which belongs to the technical field of high-speed maglev vehicles. Through the corresponding arrangement of telescopic rotating components, connecting rods and running wheel pairs on the bottom surface of the bogie at the bottom of the high-speed maglev vehicle, an emergency wheel structure that can be telescopically rotated at the bottom of the high-speed maglev vehicle is formed, which provides assistance for the transfer of the high-speed maglev vehicle after emergency braking. The emergency wheel structure of the high-speed maglev vehicle of the present invention has a simple structure and is easy to set up. It can realize the support of the train body and the running guidance after the emergency stop of the train without interfering with the normal operation of the high-speed maglev train, ensure that the sled mechanism at the bottom of the train body can be away from the rail surface of the sliding rail when the train is towed, avoid excessive wear of the sled mechanism and the sliding rail, extend their service life, ensure the convenience and accuracy of emergency towing of the high-speed maglev vehicle, promote the development of emergency evacuation technology of high-speed maglev transportation, and have good application prospects and promotion value.

Description

Technical Field

[0001] The invention belongs to the technical field of high-speed maglev vehicles, and in particular relates to an emergency wheel structure of a high-speed maglev vehicle. Background Art

[0002] With the continuous development of rail transit technology and the improvement of people's living standards, the requirements for travel quality and travel efficiency are also constantly increasing. At present, although the operating speed of traditional wheel-rail rail transit has been greatly improved compared with before, the operating speed is limited by the wheel-rail adhesion limit and it is difficult to increase it significantly. At the same time, with the continuous accumulation and development of maglev rail transit technology, the research enthusiasm for high-speed maglev rail transit has begun to heat up year by year, and Changdao high-speed maglev has initially achieved commercial application or reached the level of commercial application.

[0003] Most of the existing conventional high-speed maglev vehicles adopt the setting form of holding the rail for operation. There is a certain suspension gap between the maglev vehicle and the top surface of the sliding track when the maglev vehicle is running. When the train suddenly fails or loses power in the section, the maglev train usually uses regenerative braking, resistance braking, eddy current braking and skid braking to stop the train safely. Among them, the skid braking is the last level of braking. When the train speed drops to a very low level, the on-board skid mechanism contacts the sliding rail to brake and decelerate the train.

[0004] At present, when a high-speed maglev train stops in an emergency, most of them provide support for the whole vehicle by contacting the slide mechanism with the track surface, and then the vehicle is towed to the next station for inspection by a professional rescue vehicle. However, when the vehicle is towing, the on-board slide mechanism and the sliding rail are still in contact, that is, the train slides on the sliding rail through the slide mechanism. Although the slide mechanism is set on the maglev train as a braking component and plays a very important role, it is not suitable as a running mechanism when the high-speed maglev train is towed. This is because the friction resistance between the slide mechanism and the track surface of the maglev vehicle is huge when it is towed, which puts a great demand on the traction power of the rescue vehicle and adds additional pressure to the emergency rescue work. At the same time, for the on-board slide mechanism, long-distance towing will quickly increase the wear of its wear plate, resulting in the need for frequent replacement and maintenance. In addition, the long-distance sliding of the slide on the sliding rail will also reduce the life of the sliding brake rail, and serious noise pollution will also be generated during the sliding process. Summary of the invention

[0005] In response to one or more of the above defects or improvement needs in the prior art, the present invention provides an emergency wheel structure for a high-speed maglev vehicle, which can be kept away from the running surface of the sliding rail when the vehicle is operating normally, and can abut the running surface with the running wheels after emergency braking of the high-speed maglev vehicle, and then lift the vehicle body to complete the emergency running of the high-speed maglev vehicle.

[0006] To achieve the above object, the present invention provides an emergency wheel structure of a high-speed maglev vehicle, which is arranged at the bottom of a bogie of the high-speed maglev vehicle and includes a telescopic rotating component, a connecting rod and a running wheel pair;

[0007] The telescopic rotating component includes a hydraulic cylinder body and a piston rod; one end of the hydraulic cylinder body is rotatably connected to the bottom surface of the bogie, and the other end thereof matches one end of the piston rod, so that the piston rod can axially reciprocate and telescope under the change of the hydraulic pressure in the hydraulic cylinder body;

[0008] The connecting rod is a rod-shaped structure, one end of which is hinged to the end of the piston rod away from the hydraulic cylinder body, and the other end is rotatably connected to the bottom surface of the bogie, so that the angle between the axis of the connecting rod and the bottom surface of the bogie when the connecting rod is retracted is an acute angle;

[0009] The running wheel pair includes two running wheels arranged in pairs, and the two running wheels are connected by a coaxially arranged connecting shaft, and the connecting shaft is coaxially arranged at the position where the piston rod and the connecting rod are hinged to each other; then the running wheel pair is away from the sliding rail surface of the high-speed maglev vehicle when not in operation, and can abut against the rail surface of the sliding rail under the rotation and extension of the telescopic rotating component and the coordinated rotation of the connecting rod, and lift up the high-speed maglev vehicle.

[0010] As a further improvement of the present invention, the running wheelset is always located between two vertical planes passing through the hinge position of the hydraulic cylinder body and the bogie, and the hinge position of the connecting rod and the bogie, and the vertical planes are parallel to the axis of the connecting shaft.

[0011] As a further improvement of the present invention, a connecting support is provided on the bottom surface of the bogie corresponding to the rotational connection of the hydraulic cylinder body and / or the connecting rod.

[0012] As a further improvement of the present invention, the emergency wheel structures on the bogie are multiple and are arranged at intervals.

[0013] As a further improvement of the present invention, a plurality of emergency wheel structures are controlled in linkage and are folded up or lowered down in a unified manner.

[0014] As a further improvement of the present invention, all or part of the running wheels are electric wheels; the electric wheels can run autonomously under power supply.

[0015] As a further improvement of the present invention, the vertical stroke of the emergency wheel structure when it is converted from the stowed state to the working state is 8-15 mm.

[0016] As a further improvement of the present invention, the bottom height of the running wheelset when folded is higher than the bottom height of the sled mechanism at the bottom of the high-speed maglev vehicle, and the bottom height of the running wheelset when working is lower than the bottom height of the sled mechanism.

[0017] The above-mentioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0018] In general, compared with the prior art, the above technical solution conceived by the present invention has the following beneficial effects:

[0019] (1) The emergency wheel structure of the high-speed maglev vehicle of the present invention forms a telescopic and rotatable emergency wheel structure at the bottom of the high-speed maglev vehicle by correspondingly arranging telescopic and rotatable components, connecting rods, and running wheel pairs on the bottom surface of the bogie at the bottom of the high-speed maglev vehicle. The emergency wheel structure is always away from the track surface of the sliding rail during the normal operation and braking of the high-speed maglev vehicle, and can be switched to a working state after emergency braking. This not only avoids the interference of the emergency wheel structure with the normal operation and normal braking of the high-speed maglev vehicle after its arrangement, but also effectively realizes the rapid transfer of the vehicle after braking and evacuation, thereby ensuring the operation and braking reliability of the maglev vehicle and improving the transfer efficiency of the vehicle, saving the installation cost and use cost of the rescue equipment.

[0020] (2) The emergency wheel structure of the high-speed maglev vehicle of the present invention optimizes the relative position of the running wheel to the telescopic rotating component and the connecting rod so that the projection of the running wheel pair on the bottom surface of the bogie is always between the hinge position of the telescopic rotating component and the connecting rod, thereby effectively shortening the telescopic stroke of the piston rod and the rotation stroke of the hydraulic cylinder body and the connecting rod, reducing the design difficulty of the emergency wheel structure, realizing rapid response control of the emergency wheel, and ensuring the safe operation of the high-speed maglev train.

[0021] (3) The emergency wheel structure of the high-speed maglev vehicle of the present invention has a simple structure and is easy to set up. It can realize the support of the train body and the running guidance after the train stops in an emergency without interfering with the normal operation of the high-speed maglev train, and ensure that the slide mechanism at the bottom of the train body can be kept away from the track surface of the sliding rail when the train is towed, thereby avoiding excessive wear of the slide mechanism and the sliding rail, extending their service life, ensuring the convenience and accuracy of emergency towing of the high-speed maglev vehicle, and promoting the development of emergency evacuation technology of high-speed maglev transportation. It has good application prospects and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of an emergency wheel structure in an embodiment of the present invention when it is retracted;

[0023] Figure 2 is a schematic structural diagram of the emergency wheel structure in the embodiment of the present invention when it is working;

[0024] Figure 3 is a front view of the structure of the emergency wheel structure in the embodiment of the present invention when it is retracted;

[0025] Figure 4 is a structural front view of the emergency wheel structure in the embodiment of the present invention when it is working;

[0026] Figure 5 is a structural side view of the emergency wheel structure in an embodiment of the present invention;

[0027] Figure 6 is a schematic diagram of the structure of the telescopic rotating component matching the connecting rod in an embodiment of the present invention;

[0028] In all the drawings, the same reference numerals represent the same technical features, specifically:

[0029] 1. Telescopic rotating parts; 2. Connecting rod; 3. Running wheels; 4. Bogie; 5. Connecting support; 6. Sliding rail;

[0030] 101. Hydraulic cylinder body; 102. Piston rod. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0036] Example:

[0037] See also Figures 1 to 6 The emergency wheel structure of the high-speed maglev vehicle in the preferred embodiment of the present invention is arranged on the bottom surface of the bogie 4 of the high-speed maglev vehicle, and includes a correspondingly arranged telescopic rotating component 1, a connecting rod 2 and a running wheel pair 3.

[0038] Specifically, the telescopic rotating component 1 in the preferred embodiment is as follows: Figure 6 As shown in , it is preferably a hydraulic telescopic component, including a hydraulic cylinder body 101 and a piston rod 102. Among them, one end of the hydraulic cylinder body 101 is hinged on the bottom surface of the bogie 4, and the other end is matched with one end of the piston rod 102. By changing the hydraulic pressure in the hydraulic cylinder body 101, the axial telescopic movement of the piston rod 102 can be realized accordingly. At the same time, the other end of the piston rod 102 is hinged and matched with the end of the connecting rod 2, and a running wheel pair 3 is arranged at the hinge position of the two, as shown in FIG. Figures 1 to 5 as shown in .

[0039] Furthermore, the running wheel pair 3 in the preferred embodiment includes a pair of running wheels, a connecting shaft is provided between the two running wheels, the connecting shaft passes through the hinged position of the piston rod 102 and the connecting rod 2, and the two running wheels are respectively rotatably connected to the ends of the connecting shaft, so that the running wheel pair 3 can run on the sliding rail 6. Preferably, some or all of the running wheels provided at the bottom of the high-speed maglev vehicle are electric wheels, which can automatically run after power is supplied (non-electric wheels can be driven when the electric wheels run), so as to avoid the setting of the towing mechanism, so that the high-speed maglev vehicle with an emergency failure can walk to the corresponding station independently. At the same time, in the preferred embodiment, the distance between the two running wheels is preferably designed according to the width of the sliding rail and the length of the connecting shaft.

[0040] Furthermore, the connecting rod 2 in the preferred embodiment is in the shape of a rod, one end of which is hinged to the piston rod 102, and the other end is hinged to the bottom surface of the bogie 4, as shown in FIG. Figure 3 , 4 Preferably, connecting supports 5 are respectively provided on the bottom surface of the bogie 4 corresponding to the ends of the connecting rod 2 and the telescopic rotating component 1, so that the ends of the hydraulic cylinder body 101 and the ends of the connecting rod 2 can be hinged on the corresponding connecting supports 5 respectively.

[0041] In addition, for the running wheel set 3 in the preferred embodiment, it is always between two vertical planes passing through the hinge position of the hydraulic cylinder body 101 and the bogie 4, and the hinge position of the connecting rod 2 and the bogie 4, and the above-mentioned vertical plane is specifically parallel to the axis of the running wheel set 3, so that it can be ensured that the projection of the running wheel set 3 on the bottom surface of the bogie 4 is always between the two hinge positions on the bottom surface of the bogie 4, so that when the running wheel set 3 abuts against the track surface of the sliding rail 6, the telescopic rotating component 1 and the connecting rod 2 can share and transfer the load, ensuring the stress stability of the emergency wheel structure. When the running wheel set 3 rotates to the right below the hinge position of the connecting rod 2, the connecting rod 2 and the bottom surface of the bogie 4 are 90 degrees. At this time, the connecting rod 2 bears all / most of the vertical loads, which is not good for the stress stability of the overall structure.

[0042] In actual settings, the suspension gap of high-speed maglev vehicles is usually 8~13mm, which is relatively small. At the same time, under normal circumstances, if the emergency wheel structure is lower than the lowest point of the vehicle, it will be detrimental to driving safety. Therefore, when the train is operating normally, the emergency wheel structure is in a retracted state, such as Figure 3 When the train stops in an emergency, the hydraulic cylinder body 101 can be controlled to push the piston rod 102, so that the angle between the connecting rod 2 and the bottom surface of the bogie 4 (or the track surface of the sliding rail 6) increases, and then the running wheel set 3 abuts against the track surface of the sliding rail 6 to lift the car body, as shown in FIG. Figure 4At this time, the sled mechanism used for emergency braking of the high-speed maglev vehicle is away from the track surface of the sliding rail 6. After that, the train can be driven on the sliding rail 6 by the towing of the rescue vehicle. Obviously, if the running wheel pair 3 is an electric wheel, the electric wheel can be powered to realize the rotation of the electric wheel, so that the train can automatically run on the sliding rail 6 and automatically run to the maintenance station, avoiding the setting of the corresponding rescue equipment and saving costs.

[0043] In addition, it is worth noting that the vertical stroke required when the running wheel set 3 switches from the stowed state to the working state (the vertical stroke is not equal to the distance between the bottom of the running wheel set 3 and the track surface of the sliding rail 6 when the running wheel set 3 is stowed, but the sum of the above distance and the vehicle's jacking height) is often small, generally 8 to 15 mm, and more preferably 10 mm. In view of this, in actual settings, the overall size of the emergency wheel structure is often small. Therefore, in order to ensure the stable support of the emergency wheel mechanism, in the preferred embodiment, the emergency wheel structures on the bottom surface of the same bogie 4 are arranged at intervals, and the multiple emergency wheel structures are preferably controlled in linkage.

[0044] The emergency wheel structure of the high-speed maglev vehicle in the present invention has a simple structure and is easy to set up. It can realize the support of the vehicle body and the running guidance after the emergency stop of the train without interfering with the normal operation of the high-speed maglev train, ensure that the sled mechanism at the bottom of the vehicle body can be away from the track surface of the sliding rail when the train is towed, avoid excessive wear of the sled mechanism and the sliding rail, extend their service life, ensure the convenience and accuracy of emergency towing of the high-speed maglev vehicle, promote the development of emergency evacuation technology of high-speed maglev transportation, and have good application prospects and promotion value.

[0045] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An emergency wheel structure for a high-speed maglev vehicle, characterized in that: The emergency wheel structure is arranged at the bottom of the bogie of the high-speed maglev vehicle, and comprises a telescopic rotating component, a connecting rod and a running wheel pair; The telescopic rotating component includes a hydraulic cylinder body and a piston rod; one end of the hydraulic cylinder body is rotatably connected to the bottom surface of the bogie, and the other end thereof matches one end of the piston rod, so that the piston rod can axially reciprocate and telescope under the change of the hydraulic pressure in the hydraulic cylinder body; The connecting rod is a rod-shaped structure, one end of which is hinged to the end of the piston rod away from the hydraulic cylinder body, and the other end is rotatably connected to the bottom surface of the bogie, so that the angle between the axis of the connecting rod and the bottom surface of the bogie when the connecting rod is retracted is an acute angle; The running wheel pair includes two running wheels arranged in pairs, the two running wheels are connected by a coaxially arranged connecting shaft, and the connecting shaft is coaxially arranged at the position where the piston rod and the connecting rod are hinged to each other; and the running wheel pair is always between two vertical planes passing through the hinge position of the hydraulic cylinder body and the bogie, and the hinge position of the connecting rod and the bogie respectively, and the vertical plane is parallel to the axis of the connecting shaft; and the bottom height of the running wheel pair when folded is higher than the bottom surface height of the sled mechanism at the bottom of the high-speed maglev vehicle, and the bottom height of the running wheel pair when working is lower than the bottom surface height of the sled mechanism; then the running wheel pair is away from the sliding rail surface of the high-speed maglev vehicle when not working, and can abut the rail surface of the sliding rail under the rotation and extension of the telescopic rotating component and the coordinated rotation of the connecting rod, and lift the high-speed maglev vehicle.

2. The emergency wheel structure of a high-speed maglev vehicle according to claim 1, wherein: A connecting support is provided on the bottom surface of the bogie corresponding to the rotational connection of the hydraulic cylinder body and / or the connecting rod.

3. The emergency wheel structure of a high-speed maglev vehicle according to claim 1, wherein: There are a plurality of emergency wheel structures on the bogie that are arranged at intervals.

4. The emergency wheel structure of a high-speed maglev vehicle according to claim 3, wherein: The multiple emergency wheel structures are controlled in linkage and can be folded up or lowered in a unified manner.

5. The emergency wheel structure of a high-speed maglev vehicle according to any one of claims 1 to 4, wherein: All or part of the running wheels are electric wheels; the electric wheels can run autonomously under power supply.

6. The emergency wheel structure of a high-speed maglev vehicle according to any one of claims 1 to 4, wherein: The vertical travel of the emergency wheel structure when it is converted from the stowed state to the working state is 8-15 mm.

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