A bogie axle box for high-speed trains with overload self-adjusting structure

Abstract

The present invention discloses a bogie axle box for high-speed trains with an overload self-adjusting structure, comprising a bogie housing, an axle box housing, a gauge changing mechanism, and further comprising: an air spring, the air spring being located at the gap between the bogie housing and the axle box housing; a support member for reducing the friction between the axle box housing and the axle box support rail, the support member being arranged at one end of the axle box housing in contact with the axle box support rail; a first groove, the first groove being arranged on the outside of the axle box housing; a detection member acting on the first groove and the sunken track of the track changing device, and being able to inform the driver of the gauge changing state. In the present invention, when the gauge change is completed and the wheel pair distance is adjusted, the second connecting rod is separated from the pressure switch under the elastic action of the first spring and the second spring, thereby disconnecting the circuit, reminding the operator in the control room that the limit pin has been re-locked, and the real-time state of the gauge changing operation can be effectively informed to the operator in the control room.

Description

Technical Field

[0001] The invention relates to the technical field of high-speed train gauge change, and in particular to a bogie axle box for a high-speed train with an overload self-adjusting structure. Background Art

[0002] With the rapid development of global economic integration, cross-border passenger and freight transportation has grown rapidly in recent years. However, due to the different track gauges of railways in different countries, cross-border railway transportation has been seriously hindered. In order to solve the problem that the different track gauges of railways in different countries hinder cross-border railway transportation, variable track gauge trains are proposed. That is, when a train travels on the railway of another country, it changes the spacing between the wheels on its own wheelset to adapt to the track gauge of the railway of another country.

[0003] In order to achieve automatic track gauge change of the train, the bogie and the ground device need to cooperate perfectly. The process is divided into five steps: the first step is that the wheels drive into the sunken track of the ground track change device, so that the axle box on the outside of the wheel, which was originally suspended in the air, falls on the support rail, and the axle box begins to contact the support rail and support the weight of the train, transferring the weight of the vehicle from the wheel to the axle box. At this time, the wheels are suspended in the air, and because the other powered carriages are still running, the axle box and the support rail slide and rub, and the train can still continue to move forward; the second step is to open the locking pin that maintains the spacing between the wheel pairs through the unlocking guide rail of the ground track change device; the third step is to apply an outward and inward force to the wheel through the guide rail to expand or reduce the spacing between the wheels; the fourth step is to insert the locking pin into the new position through the guide rail of the ground track change device to determine the new position relationship between the wheel and the axle; the fifth step is to let the wheel contact the track again and transfer the weight of the train from the axle box back to the wheel. However, during the entire track change process, the axle box and the axle box support rail need to slide and rub against each other, which requires continuous spraying of lubricant on the track, so as to provide support and help keep the vehicle moving forward. However, this method has high maintenance costs and high friction, which leads to serious wear of the axle box support rail. CRRC replaced the straight axle box support rail with hundreds of rollers, and changed the sliding friction to rolling friction. Since the friction is reduced, no lubricant is required. However, the rollers installed vertically and horizontally on the axle box support rail are costly to build. With long-term use, friction between the rollers and the axle box is inevitable, resulting in inaccurate detection of the distance sensor between the rollers and the axle box, making it impossible for the driver in the cockpit to accurately judge whether the track change operation is completed, resulting in usage defects. Summary of the invention

[0004] The purpose of the present invention is to solve the above-mentioned problems and to propose a bogie axle box for high-speed trains with an overload self-adjusting structure.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A bogie axle box for a high-speed train with an overload self-adjusting structure comprises a bogie housing, an axle box housing, a track gauge changing mechanism, and further comprises:

[0007] An air spring, wherein the air spring is located at a gap between the bogie housing and the axle box housing;

[0008] A support member for reducing the friction between the axle box housing and the axle box support rail, wherein the support member is arranged at one end where the axle box housing contacts the axle box support rail;

[0009] A first groove, wherein the first groove is formed on the outer side of the axle box housing;

[0010] A detection member acts on the first groove and the sunken rail of the track changing device and can inform the driver of the track gauge change status.

[0011] As a further description of the above technical solution:

[0012] The support member comprises a support arm fixed at the bottom end of the axle box housing and a first rotating wheel rotatably connected to the support arm through a pin shaft.

[0013] As a further description of the above technical solution:

[0014] The detection part includes a first connecting rod that passes through the axle box housing, a connecting platform is provided at one end of the first connecting rod close to the sinking track, a limiting rod located in the guide groove of the limiting guide rail is provided at one end of the connecting platform away from the axle box support rail, a moving platform is provided at one end of the first connecting rod away from the sinking track, and a transmission part that cooperates with the moving platform for transmission is provided in the axle box housing.

[0015] As a further description of the above technical solution:

[0016] The transmission member includes a positioning notch opened on the movable platform and a third groove opened on the axle box housing, the third grooves are respectively fixed with a pressure switch and a fixed plate, a second connecting rod is slidably connected to the fixed plate, and a transmission block adapted to the positioning notch is fixedly connected to the end of the second connecting rod, and the transmission block is elastically connected to the fixed plate through a second spring.

[0017] As a further description of the above technical solution:

[0018] A first spring capable of returning the movable platform to its original position is arranged between the movable platform and the inner surface wall at the bottom end of the first groove.

[0019] As a further description of the above technical solution:

[0020] Limiting plates are arranged on both sides of the moving platform, and limiting grooves matching with the limiting plates are arranged on the inner surface walls on both sides of the first groove.

[0021] As a further description of the above technical solution:

[0022] A second groove is provided on the axle box housing, a fixing rod is provided in the second groove, and a limiting wheel is rotatably connected to the fixing rod.

[0023] As a further description of the above technical solution:

[0024] The first rotating wheel is provided with a conical tread.

[0025] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0026] 1. In the present invention, when the axle box housing slides on the axle box support rail, the first connecting rod rises, and the first connecting rod drives the moving platform to move, and the movement of the moving platform in the vertical direction is converted into the movement of the transmission block and the second connecting rod in the horizontal direction. The transmission block is elastically connected to the fixed plate through the second spring. When the second connecting rod abuts against the pressure switch, the pressure switch can conduct the circuit and send a signal to feed back to the state conversion switch in the train control room to remind the operator in the control room that the limit pin has been successfully unlocked. When the gauge change is completed and the wheelset distance is adjusted, the second connecting rod is separated from the pressure switch under the elastic action of the first spring and the second spring, thereby disconnecting the circuit, reminding the operator in the control room that the limit pin has been re-locked, which can effectively inform the operator in the control room of the real-time status of the gauge change operation.

[0027] 2. In the present invention, by setting the first rotating wheel, the cost of transforming the axle box support rail into a roller is reduced. Similarly, the sliding fit is converted into a rotating fit, which can reduce the friction between the axle box housing and the axle box support rail, reduce wear, thereby reducing the time for changing the track gauge and improving efficiency.

[0028] 3. In the present invention, the track changing device does not need special insulation treatment, and the operation and maintenance cost is low. When the train passes through the ground device at a speed of 15 km / h, one bogie can be changed within 10 seconds, and the track changing of the entire train can be completed within three minutes, which greatly reduces the waiting time for traveling through different track gauges. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a side structural schematic diagram of a bogie axle box for a high-speed train with an overload self-adjusting structure proposed by the present invention;

[0030] Figure 2 The invention proposes a high-speed train bogie axle box with an overload self-adjusting structure. Figure 1 A local enlarged structural schematic diagram;

[0031] Figure 3This is a front view structural schematic diagram of a bogie axle box for a high-speed train with an overload self-adjusting structure proposed by the present invention;

[0032] Figure 4 The invention proposes a high-speed train bogie axle box with an overload self-adjusting structure. Figure 3 B is a schematic diagram of a local enlarged structure;

[0033] Figure 5 This is a schematic diagram of the cross-sectional structure of an axle box shell of a high-speed train bogie axle box with an overload self-adjusting structure proposed by the present invention;

[0034] Figure 6 The invention proposes a high-speed train bogie axle box with an overload self-adjusting structure. Figure 5 Schematic diagram of the local enlarged structure of C.

[0035] Legend:

[0036] 1. Bogie housing; 2. Axle box housing; 3. Gauge changing mechanism; 4. Air spring; 5. First groove; 6. Support arm; 7. First rotating wheel; 8. Second groove; 9. Limiting wheel; 10. Fixed rod; 11. First connecting rod; 12. Connecting platform; 13. Limiting rod; 14. Limiting groove; 15. Limiting plate; 16. Moving platform; 17. First spring; 18. Positioning notch; 19. Transmission block; 20. Third groove; 21. Fixed plate; 22. Pressure switch; 23. Second connecting rod; 24. Second spring. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0038] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0039] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] See also Figure 1-6 The present invention provides a technical solution: a bogie axle box for a high-speed train with an overload self-adjusting structure, comprising a bogie housing 1, an axle box housing 2, and a gauge-changing mechanism 3. The axle box support rail and the sinking rail are prior art. The axle box support rail can support the weight of the train and transfer the weight of the vehicle from the wheel to the axle box. The sinking rail makes the axle box originally suspended outside the wheel fall on the axle box support rail, and also includes:

[0042] An air spring 4, the air spring 4 is located at the gap between the bogie housing 1 and the axle box housing 2, the air spring 4 can play a shock absorbing effect, and the bogie housing 1 and the axle box housing 2 are elastically connected through the air spring 4;

[0043] A support member for reducing the friction between the axle box housing 2 and the axle box support rail, the support member is arranged at one end of the axle box housing 2 that contacts the axle box support rail, the support member comprises a support arm 6 fixed to the bottom end of the axle box housing 2 and a first rotating wheel 7 rotatably connected to the support arm 6 via a pin shaft, the first rotating wheel 7 abuts against the axle box support rail, a conical tread is provided on the first rotating wheel 7, and the axle box support rail is provided with a conical tread that matches the conical tread, and the conical tread can adjust the walking distance of the wheel, and the cost of transforming the axle box support rail into a roller is reduced by setting the first rotating wheel 7, and the sliding fit is also converted into a rotating fit, which can reduce the friction between the axle box housing 2 and the axle box support rail, reduce wear, thereby reducing the time for changing the track gauge and improving efficiency;

[0044] A first groove 5, the first groove 5 is opened on the outer side of the axle box housing 2, the first groove 5 is formed on the axle box housing 2 and the first groove 5 passes through the axle box housing 2;

[0045] A detection member that acts on the first groove 5 and the sinking track of the track-changing device and can inform the driver of the track gauge change status, the detection member includes a first connecting rod 11 that passes through the axle box housing 2, a connecting platform 12 is fixed to the end of the first connecting rod 11 close to the sinking track, a limiting rod 13 located in the limiting guide rail guide groove is provided at the end of the connecting platform 12 away from the axle box support rail, the limiting guide rail is fixed on the ground, the limiting guide rail guide groove is inclined, and the cooperation between the limiting guide rail and the limiting rod 13 can prevent the train from deviating, a moving platform 16 is fixedly connected to the top of the first connecting rod 11, a first spring 17 that can reset the moving platform 16 is provided between the moving platform 16 and the inner surface wall of the bottom end of the first groove 5, the moving platform 16 is elastically connected to the inner surface wall of the first groove 5 through the first spring 17, and a transmission member that cooperates with the moving platform 16 for transmission is provided in the axle box housing 2.

[0046] Specifically, Figure 4 and Figure 6As shown, the transmission member includes a positioning notch 18 provided on the moving platform 16, the cross section of the positioning notch 18 is triangular, and a third groove 20 provided on the axle box housing 2, the third groove 20 is respectively fixedly connected with a pressure switch 22 and a fixed plate 21, the pressure switch 22 is fixedly connected with the end of the third groove 20, a second connecting rod 23 is slidably connected to the fixed plate 21, and a transmission block 19 adapted to the positioning notch 18 is fixedly connected to the end of the second connecting rod 23, the moving platform 16 transmission block 19 is slidably matched, and when the axle box housing 2 slides on the axle box support rail, the first connecting rod 11 is raised, and the first connecting rod 11 drives the moving platform 16 to move, and the moving platform 16 is driven by the moving The vertical movement of the platform 16 is converted into the horizontal movement of the transmission block 19 and the second connecting rod 23. The transmission block 19 is elastically connected to the fixed plate 21 through the second spring 24. When the second connecting rod 23 abuts against the pressure switch 22, the pressure switch 22 can turn on the circuit and send a signal to the state conversion switch in the train control room to remind the operator in the control room that the limit pin has been successfully unlocked. When the track gauge is changed and the wheelset distance is adjusted, the second connecting rod 23 is separated from the pressure switch 22 under the elastic action of the first spring 17 and the second spring 24, thereby disconnecting the circuit and reminding the operator in the control room that the limit pin has been re-locked.

[0047] Specifically, Figure 1 and Figure 4 As shown, both ends of the outer wall of the movable platform 16 corresponding to the inner wall of the first groove 5 are fixedly connected with the limiting plates 15, and the inner walls on both sides of the first groove 5 are provided with limiting grooves 14 adapted to the limiting plates 15. The cooperation between the limiting plates 15 and the limiting grooves 14 can prevent the movable platform 16 from shifting during the movement.

[0048] Specifically, Figure 1 and Figure 2 As shown, a second groove 8 is provided on the axle box housing 2, a fixing rod 10 is provided in the second groove 8, a limiting wheel 9 is rotatably connected to the fixing rod 10, and the limiting wheel 9 abuts against the side surface of the guide rail, which can further improve the sliding effect.

[0049] Working principle: When the axle box housing 2 slides on the axle box support rail, the first connecting rod 11 rises, and the first connecting rod 11 drives the moving platform 16 to move, and the vertical movement of the moving platform 16 is converted into the horizontal movement of the transmission block 19 and the second connecting rod 23. The transmission block 19 is elastically connected to the fixed plate 21 through the second spring 24. When the second connecting rod 23 abuts against the pressure switch 22, the pressure switch 22 can conduct the circuit and send a signal to feedback the state conversion switch in the train control room to remind the operator in the control room that the limit pin has been unlocked successfully. When the track gauge is changed and the wheelset distance is adjusted, the second connecting rod 23 and the pressure switch are connected under the elastic action of the first spring 17 and the second spring 24. 22 is separated, thereby disconnecting the circuit, reminding the operator in the control room that the limit pin has been re-locked, which can effectively inform the operator in the control room of the real-time status of the gauge change operation. By setting the first rotating wheel 7, the cost of transforming the axle box support rail into a roller is reduced. Similarly, the sliding fit is converted into a rotating fit, which can reduce the friction between the axle box housing 2 and the axle box support rail, reduce wear, thereby reducing the gauge change time and improving efficiency. In addition, the gauge change device does not require special insulation treatment, and the operation and maintenance cost is low. When the train passes through the ground device at a speed of 15 / km per hour, a bogie can be changed within 10 seconds, and the entire train can be changed within three minutes, which greatly reduces the waiting time for traveling through different gauges.

[0050] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A bogie axle box for a high-speed train with an overload self-adjusting structure, comprising a bogie housing (1), an axle box housing (2), a track gauge changing mechanism (3), and an air spring (4), wherein the air spring (4) is located at a gap between the bogie housing (1) and the axle box housing (2); A support member for reducing the friction between the axle box housing (2) and the axle box support rail, the support member being arranged at one end of the axle box housing (2) in contact with the axle box support rail; A first groove (5), the first groove (5) being formed on the outside of the axle box housing (2); A detection member that acts on the first groove (5) and the sinking rail of the track changing device and can inform the driver of the track gauge change status; the support member comprises a support arm (6) fixed to the bottom end of the axle box housing (2) and a first rotating wheel (7) rotatably connected to the support arm (6) via a pin shaft; the detection member comprises a first connecting rod (11) that passes through the axle box housing (2); a connecting platform (12) is provided at one end of the first connecting rod (11) close to the sinking rail; a limiting rod (13) located in a guide groove of a limiting guide rail is provided at one end of the connecting platform (12) away from the axle box support rail; a moving platform (16) is provided at one end of the first connecting rod (11) away from the sinking rail; and a transmission member that cooperates with the moving platform (16) for transmission is provided in the axle box housing (2); It is characterized in that The transmission member comprises a positioning notch (18) formed on the movable platform (16) and a third groove (20) formed on the axle box housing (2); the third groove (20) is respectively fixedly connected with a pressure switch (22) and a fixed plate (21); a second connecting rod (23) is slidably connected to the fixed plate (21); a transmission block (19) adapted to the positioning notch (18) is fixedly connected to the end of the second connecting rod (23); and the transmission block (19) is elastically connected to the fixed plate (21) via a second spring (24).

2. The high-speed train bogie axle box with an overload self-adjusting structure according to claim 1, characterized in that: A first spring (17) capable of returning the movable platform (16) to its original position is provided between the movable platform (16) and the inner surface wall of the bottom end of the first groove (5).

3. The high-speed train bogie axle box with an overload self-adjusting structure according to claim 1, characterized in that: Limiting plates (15) are provided on both sides of the moving platform (16), and limiting grooves (14) matching the limiting plates (15) are provided on the inner surface walls on both sides of the first groove (5).

4. The high-speed train bogie axle box with an overload self-adjusting structure according to claim 1, characterized in that: The axle box housing (2) is provided with a second groove (8), a fixing rod (10) is provided in the second groove (8), and a limiting wheel (9) is rotatably connected to the fixing rod (10).

5. The high-speed train bogie axle box with an overload self-adjusting structure according to claim 1, characterized in that: The first rotating wheel (7) is provided with a conical tread.

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