Vehicle body floor protection device and railway vehicle

Abstract

The invention discloses a vehicle body floor protection device and a railway vehicle, and relates to the technical field of railway vehicles, the vehicle body floor protection device comprises a buffer module, a collision sampling module, a load detection module and a control module, a buffer airbag of the buffer module is accommodated in a storage groove of a vehicle body floor, and a turnover cover is arranged at a groove opening of the storage groove; the collision sampling module is used for detecting whether the vehicle body collides; the load detection module is used for detecting whether a vehicle body floor has a carrying object; when the collision sampling module collects collision of the vehicle body and the load detection module detects that no carrying object exists on the floor of the vehicle body, the control module controls the buffering module to inflate the buffering air bag according to a collision signal fed back by the collision sampling module and a no-load signal fed back by the load detection module, and the buffering air bag expands to jack the overturning cover open. And after the overturning cover is opened, the buffering module is controlled to continuously inflate the buffering air bag until the buffering air bag expands and fills the middle passage of the vehicle body floor, and the safety of the whole vehicle is improved through buffering.

Description

Technical Field

[0001] The present invention relates to the technical field of rail vehicles, and in particular to a vehicle body floor protection device and a rail vehicle. Background Art

[0002] The continued acceleration of urbanization and the rapid expansion of rail transit networks are placing ever-stricter demands on the safety of rail vehicles. As an integral part of urban public transportation systems, modern rail vehicles must not only ensure efficient transportation but also achieve comprehensive safety improvements in complex operating environments.

[0003] However, due to the limitations of existing technology and the lack of effective anti-collision protection design for the vehicle floor, when a rail vehicle encounters a major accident such as a collision or derailment while running at high speed, severe longitudinal or lateral impacts will occur between adjacent carriages, and the carriages will experience significant lateral tilt or even complete overturning, causing passengers who are not fixed or standing in the car to be thrown out of their original position due to inertia and their bodies to hit the vehicle floor, causing serious injuries such as limb fractures and internal organ damage to passengers, and safety is still threatened. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a vehicle floor protection device and a rail vehicle. When the vehicle body collides, the cushioning airbag automatically expands and fills the middle aisle of the vehicle body floor, preventing passengers from falling directly onto the vehicle body floor and being injured by collision, thereby improving the safety of the rail vehicle and solving the technical problem of relatively low safety of existing rail vehicles.

[0005] To achieve the above-mentioned objectives, the present invention provides a vehicle floor protection device, comprising a buffer module, a collision sampling module, a load detection module, and a control module. The buffer airbag of the buffer module is accommodated in a storage groove of the vehicle floor, and the notch of the storage groove is provided with a flip cover; the collision sampling module is used to detect whether the vehicle body has collided; and the load detection module is used to detect whether there is a carrying object on the vehicle floor.

[0006] When the collision sampling module detects that the vehicle body has collided and the load detection module detects that there is no carrying object on the vehicle body floor, the control module controls the buffer module to inflate the buffer airbag according to the collision signal feedback from the collision sampling module and the no-load signal feedback from the load detection module. The buffer airbag pushes open the flip cover by expansion, and after the flip cover is opened, the buffer module is controlled to continue to inflate the buffer airbag until the buffer airbag expands and fills the middle aisle of the vehicle body floor.

[0007] In some embodiments, a support rod is fixedly provided on one side of the storage slot, and a guide hole is formed on the support rod. The guide hole extends along the depth direction of the storage slot, and a sliding rod is slidably provided in the guide hole. The sliding rod is hingedly connected to the flip cover via a rotating shaft.

[0008] When the cushioning airbag is stored in the storage groove, the sliding rod is at the lowest position of the guide hole, the flip cover stays in the first position, the rotating shaft is located in the storage groove, and the flip cover remains flush with the vehicle body floor;

[0009] When the cushioning airbag pushes open the flip cover, the sliding rod slides upward from the lowest position to the highest position along the guide hole under the push of the cushioning airbag. After the rotating shaft exceeds the receiving slot, the flip cover rotates from the first position to the second position.

[0010] In some embodiments, an unlocking rod is provided on the side of the flip cover facing the storage slot, and at least two suspension rods are slidably provided between the unlocking rod and the flip cover; a locking rod is provided on the end of the flip cover away from the sliding rod;

[0011] When the cushioning airbag is stored in the storage slot, the unlocking rod and the locking rod abut against each other, and the flip cover is locked;

[0012] When the buffer airbag presses against the unlocking rod, the unlocking rod moves toward the flip cover under the guidance of the suspension rod, the unlocking rod disengages from the locking rod, and the flip cover is unlocked.

[0013] In some embodiments, an abutment slope is provided at one end of the unlocking rod, which is inclined in a direction away from the locking rod; a limiting slope is provided at one end of the locking rod toward the unlocking rod; when the unlocking rod abuts against the locking rod, the abutment slope and the limiting slope abut against each other to form a wedge-shaped fit.

[0014] In some embodiments, a mounting groove is formed on a side of the receiving groove away from the support rod, and a push spring is provided in the mounting groove;

[0015] When the unlocking rod abuts against the locking rod, the locking rod presses the push spring into the installation slot;

[0016] When the unlocking rod is out of contact with the locking rod, the push spring pushes the flip cover to flip from the first position to the second position through the locking rod.

[0017] In some embodiments, the locking rod and the flip cover are hingedly connected via a rotating axis; when the cushioning airbag abuts against the locking rod in the middle aisle, the cushioning airbag pushes the locking rod to rotate around the rotating axis away from the flip cover until the locking rod is in contact with the vehicle floor.

[0018] In some embodiments, the cushioning assembly includes an inflation tube connected to the cushioning airbag, an inflation valve provided on the inflation tube, and a compressed air tank connected to the inflation tube; and further includes an air pressure detection module for detecting the current air pressure of the cushioning airbag;

[0019] When the control module receives the collision signal and the no-load signal, the control module controls the inflation valve to open, and the compressed gas tank inflates the buffer gas tank through the inflation pipe;

[0020] When the air pressure detection module detects that the current air pressure exceeds the set air pressure, the control module closes the inflation valve according to the shutdown signal fed back by the air pressure detection module.

[0021] In some embodiments, the system further includes a fault alarm module and a timing module, wherein the timing module is used to record the inflation time of the cushioning airbag;

[0022] When the inflation time of the cushion airbag recorded by the timing module reaches the set time, the control module determines whether the current air pressure fed back by the air pressure detection module exceeds the set air pressure based on the time signal fed back by the timing module. If not, the fault alarm module is activated.

[0023] In some embodiments, a plurality of pressure-sensitive areas are provided in the middle aisle of the vehicle floor. All pressure-sensitive areas are evenly distributed along the length of the vehicle floor, and the width of each pressure-sensitive area is equal to the width of the middle aisle. A load detection module is provided for each pressure-sensitive area.

[0024] The present invention also provides a rail vehicle comprising the above-mentioned vehicle body floor protection device.

[0025] Compared to the prior art, the present invention designs a vehicle floor protection device comprising a buffer module, a collision sampling module, a load detection module, and a control module. The buffer module's airbag is housed in a storage slot in the vehicle floor, the slot having a flip cover. The collision sampling module detects whether the vehicle has collided, and the load detection module detects whether a load is on the vehicle floor.

[0026] When the collision sampling module detects that the vehicle body has collided and the load detection module detects that there is no carrying object on the vehicle body floor, the control module controls the buffer module to inflate the buffer airbag according to the collision signal fed back by the collision sampling module and the no-load signal fed back by the load detection module. The buffer airbag pushes open the flip cover by expansion, and after the flip cover is opened, the buffer module is controlled to continue to inflate the buffer airbag until the buffer airbag expands and fills the middle aisle of the vehicle body floor, causing the airborne passenger to fall onto the buffer airbag.

[0027] The present invention can control the automatic expansion of the cushioning airbag when the vehicle body collides, and fill the middle aisle of the vehicle body floor, providing effective cushioning for passengers, preventing passengers from falling directly onto the vehicle body floor and being injured by collision, greatly reducing the risk of passenger injury, and improving the safety of rail vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0029] Figure 1 This is a state diagram of a vehicle floor protection device provided by a specific embodiment of the present invention when the cushioning airbag is fully inflated;

[0030] Figure 2 for Figure 1 A diagram showing the state of the center cushion airbag when it is fully inflated on the center aisle of the vehicle floor;

[0031] Figure 3 for Figure 2 State diagram when the cushioning airbag is removed;

[0032] Figure 4 for Figure 3 A magnified view of one end;

[0033] Figure 5 A diagram showing a state of a vehicle floor protection device provided by a specific embodiment of the present invention when the cushioning airbag is accommodated in the receiving groove of the vehicle floor;

[0034] Figure 6 This is a state diagram of a vehicle floor protection device provided by a specific embodiment of the present invention when receiving a fallen carried object;

[0035] Figure 7 for Figure 1 A diagram showing the state of the middle cushion airbag when it is accommodated in the storage groove of the vehicle floor;

[0036] Figure 8 for Figure 7 A partial enlarged view of

[0037] Figure 9 for Figure 1 The state diagram when the middle cushion airbag pushes the unlocking lever away from the locking lever;

[0038] Figure 10 for Figure 1 A diagram showing the state when the middle cushioning airbag pushes the flip cover to rotate from the first position to the second position;

[0039] Figure 11 for Figure 1 A diagram showing the state when the middle cushion airbag pushes the flip cover to flip to the second position;

[0040] Figure 12 for Figure 1The state diagram when the middle cushion airbag pushes the release lever against the vehicle floor.

[0041] The reference numerals are as follows:

[0042] Buffer airbag 1, collision sampling module 2, load detection module 3 and control module 4, vehicle body floor 5, flip cover 6, support rod 7, sliding rod 8, rotating shaft 9, unlocking rod 10, suspension rod 11, locking rod 12, push spring 13, rotating shaft 14 and carried object 15;

[0043] Storage slot 51 and middle aisle 52;

[0044] Guide hole 71;

[0045] abutment slope 101;

[0046] Limiting inclined surface 121. DETAILED DESCRIPTION

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0048] In order to enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0049] The embodiment of the present invention discloses a vehicle floor protection device, as shown in the attached Figures 1 to 4 As shown, the vehicle comprises a buffer module, a collision sampling module 2, a load detection module 3, and a control module 4. The buffer module is used to effectively cushion any falling passengers in the event of a collision. The collision sampling module 2 detects whether the vehicle has collided and can be implemented using, but not limited to, an acceleration sensor or a pressure sensor. The load detection module 3 detects whether a transport object 15 is present on the vehicle floor 5 and can be implemented using, but not limited to, a pressure sensor. The transport object 15 can be either cargo or passengers.

[0050] As attached Figures 7 to 12As shown, the vehicle body floor 5 is provided in a storage groove 51, and the buffer airbag 1 of the buffer module is accommodated in the storage groove 51, that is, a hidden design is adopted. When the rail vehicle is running normally, the deflated buffer airbag 1 is hidden in the vehicle body floor 5, so as to prevent the buffer airbag 1 from occupying the passenger's riding space and ensure the comfort of the car. The notch of the storage groove 51 is provided with a flip cover 6, and the flip cover 6 has two extreme positions. When the rail vehicle is running normally, the flip cover 6 stays in the first position. The flip cover 6 is used to cover the receiving groove to prevent passengers from stepping on air and falling into the receiving groove, thereby reducing the passenger experience. When the rail vehicle collides, the flip cover 6 stays in the second position, and the receiving groove 51 is fully opened to prevent the flip cover 6 from obstructing the buffer airbag 1 from extending to the middle aisle 52 of the vehicle body floor 5.

[0051] When the collision sampling module 2 detects that the vehicle body has collided, and the load detection module 3 detects that there is no carrying object 15 on the vehicle body floor 5, the control module 4 controls the buffer module to inflate the buffer airbag 1 according to the collision signal fed back by the collision sampling module 2 and the no-load signal fed back by the load detection module 3. The buffer airbag 1 pushes open the flip cover 6 by expansion, and controls the buffer module to continue to inflate the buffer airbag 1 after the flip cover 6 is opened, until the buffer airbag 1 expands and fills the middle aisle 52 of the vehicle body floor 5, so that the vacated carrying object 15 falls on the buffer airbag 1, and the attached Figure 6 shown.

[0052] The present invention can control the automatic expansion of the cushioning airbag 1 when the vehicle body collides, and fill the middle aisle 52 of the vehicle body floor 5, providing effective cushioning for passengers, preventing passengers from falling directly onto the vehicle body floor 5 and being injured by collision, greatly reducing the risk of passenger injury, and improving the safety of rail vehicles.

[0053] As a preferred embodiment, a support rod 7 is fixedly provided on one side of the storage groove 51, and a guide hole 71 is formed at the top end of the support rod 7. The guide hole 71 extends along the depth direction of the storage groove 51, and a sliding rod 8 is slidably provided in the guide hole 71. The sliding rod 8 is hingedly connected to the flip cover 6 through a rotating shaft 9, so that the sliding rod 8 drives the flip cover 6 to slide back and forth up and down in the storage groove 51.

[0054] When the cushioning airbag 1 is stored in the storage groove 51, as shown in the attached Figure 7 As shown, the sliding rod 8 is at the lowest position of the guide hole 71, the flip cover 6 stays in the first position, and the rotating shaft 9 is located in the storage groove 51. At this time, one end of the flip cover 6 is against the support rod 7, limiting the rotation of the flip cover 6 around the rotating shaft 9, so that the flip cover 6 remains flush with the vehicle floor 5, avoiding the stepped boss formed by the unevenness of the flip cover 6 and the vehicle floor 5 to trip the passengers and cause secondary injuries to the passengers, ensuring greater safety in the vehicle compartment.

[0055] When the cushioning airbag 1 pushes the flip cover 6, the sliding rod 8 slides upward from the lowest position to the highest position along the guide hole 71 under the push of the cushioning airbag 1, and the flip cover 6 and the rotating shaft 9 slide upward synchronously with the sliding rod 8. After the rotating shaft 9 exceeds the receiving groove 51, as shown in the attached Figure 10 As shown, the flip cover 6 rotates from the first position to the second position around the rotation axis 9, so that the cushioning airbag 1 provides a reliable pushing force for opening the flip cover 6.

[0056] The flip cover 6 in the present invention adopts a sliding-rotating composite motion mechanism, which can ensure that the flip cover 6 remains stably closed and prevents accidental opening through the recessed design when the vehicle is driving normally, and can also provide a reliable flipping force for the flip cover 6 when a collision occurs, ensuring the instant responsiveness of the flip cover 6 under emergency conditions and reducing the risk of the flip cover 6 getting stuck, thereby improving the reliability and safety of the entire device.

[0057] As a preferred embodiment, as shown in the attached Figures 7 to 12 As shown, an unlocking lever 10 is provided on the side of the flip cover 6 facing the storage slot 51. At least two suspension rods 11 are slidably provided between the unlocking lever 10 and the flip cover 6. All suspension rods 11 ensure that the unlocking lever 10 and the flip cover 6 always remain parallel. When the flip cover 6 is in the first position, a movable gap is left between the flip cover 6 and the unlocking lever 10, providing space for the unlocking lever 10 to move relative to the flip cover 6. Preferably, one end of the suspension rod 11 is hingedly connected to the unlocking lever 10, and the other end is provided with a waist-shaped hole, which is slidably connected to a guide pin provided on the flip cover 6. A locking rod 12 is provided on the end of the flip cover 6 away from the sliding rod 8. When the flip cover 6 is in the first position, the locking rod 12 cooperates with the unlocking lever 10 to limit the position of the flip cover 6, allowing the flip cover 6 to remain stably in the first position, preventing the flip cover 6 from accidentally opening and thereby preventing passengers from accidentally stepping into the storage slot 51, effectively improving safety.

[0058] When the cushioning airbag 1 is stored in the storage groove 51, the flip cover 6 is in the first position, and the unlocking rod 10 and the locking rod 12 are in contact with each other. Figure 7 and 8 The flip cover 6 is locked to ensure that the flip cover 6 is stably in the first position.

[0059] When the cushioning airbag 1 presses against the unlocking rod 10, the cushioning airbag 1 pushes the unlocking rod 10 upward by expanding, and the unlocking rod 10 moves toward the flip cover 6 under the guidance of the suspension rod 11, so that the unlocking rod 10 and the locking rod 12 are staggered in the height direction of the storage groove 51, and the unlocking rod 10 and the locking rod 12 are disengaged, as shown in the attached figure. Figure 9 As shown, the flip cover 6 is unlocked, so that the flip cover 6 is fully opened under the push of the cushioning airbag 1, so as to prevent the flip cover 6 from hindering the cushioning airbag 1 from fully expanding.

[0060] As a preferred embodiment, as shown in the attached Figure 10 As shown, one end of the unlocking rod 10 is provided with an abutting inclined surface 101, which is inclined in the direction away from the locking rod 12; the locking rod 12 is provided with a limiting inclined surface 121 at one end facing the unlocking rod 10; when the unlocking rod 10 and the locking rod 12 abut, the abutting inclined surface 101 and the limiting inclined surface 121 abut against each other to form a wedge-shaped fit, and the locking rod 12 limits the unlocking rod 10 from moving in the height direction of the storage groove 51, thereby ensuring that the flip cover 6 is securely fixed and reducing the risk of the flip cover 6 being accidentally flipped open.

[0061] As a preferred embodiment, as shown in the attached Figures 7 to 12 As shown, a mounting groove is formed on the side of the receiving groove 51 away from the support rod 7, and a push spring 13 is provided in the mounting groove. When the unlocking rod 10 is in contact with the locking rod 12, the locking rod 12 squeezes the push spring 13 into the mounting groove. When the unlocking rod 10 is out of contact with the locking rod 12, the push spring 13 pushes the flip cover 6 from the first position to the second position through the locking rod 12, so that the buffer airbag 1 and the push spring 13 jointly push the flip cover 6 open, avoiding the buffer cylinder from being unable to provide a large flipping force for the flip cover 6 due to insufficient inflation in the initial stage, and improving the response speed of the flip cover 6 to meet the emergency triggering requirements at the moment of rail vehicle collision. The redundant drive design ensures that the flip cover 6 operates reliably, avoids delays or jams, and improves reliability.

[0062] It should be noted that the depth of the installation groove is greater than or equal to the natural length of the push spring 13, so as to avoid direct contact between the cushioning airbag 1 and the push spring 13 when the cushioning airbag 1 is fully inflated, thereby avoiding the risk of the push spring 13 puncturing the cushioning airbag 1, and further avoiding the whole device from failing to play a cushioning role due to damage to the cushioning airbag 1, thereby effectively improving the reliability of the whole device.

[0063] As a preferred embodiment, as shown in the attached Figures 7 to 12 As shown, the locking rod 12 and the flip cover 6 are hingedly connected by a rotating shaft 14; when the cushioning airbag 1 is in contact with the locking rod 12 in the middle aisle 52, the cushioning airbag 1 pushes the locking rod 12 to rotate around the rotating shaft 14 in the direction away from the flip cover 6 until the locking rod 12 is in contact with the vehicle body floor 5, thereby preventing the sharp ridges formed by the setting of the limiting slope 121 at the end of the locking rod 12 from piercing the cushioning airbag 1, reducing the risk of accidental damage to the cushioning airbag 1, and ensuring that the cushioning airbag 1 works safer and more reliably.

[0064] In a preferred embodiment, the cushioning assembly includes an inflation tube connected to the cushioning airbag 1, an inflation valve provided on the inflation tube, and a compressed air tank connected to the inflation tube. The vehicle floor protection device also includes an air pressure detection module for detecting the current air pressure of the cushioning airbag 1, which can be, but is not limited to, a pressure sensor.

[0065] When the control module 4 receives a collision signal and an empty load signal, the control module 4 controls the inflation valve to open, and the compressed gas tank inflates the buffer gas tank through the inflation pipe, realizing automatic inflation at the moment of collision. The control accuracy is high and the inflation response speed is high, which is beneficial to improving the safety and reliability of the entire device.

[0066] When the air pressure detection module detects that the current air pressure exceeds the set pressure, control module 4 closes the inflation valve according to the shutoff signal fed back by the air pressure detection module. This automatically stops inflation after the cushion airbag 1 has fully inflated, preventing the cushion airbag 1 from exploding due to overinflation and providing greater safety. The set pressure in this context refers to the internal air pressure of the cushion airbag 1 when it is fully inflated.

[0067] As a preferred embodiment, the vehicle floor protection device further includes a fault alarm module and a timing module. The timing module is used to record the inflation time of the cushion airbag 1. When the inflation time recorded by the timing module reaches the set time, the control module 4 determines whether the current air pressure reported by the air pressure detection module exceeds the set pressure based on the time signal fed back by the timing module. If not, the fault alarm module is activated. That is, during the testing phase, after the cushion airbag 1 is fully inflated, the internal air pressure of the cushion airbag 1 is detected to diagnose the cushion airbag 1 fault. If a fault occurs, an automatic warning alert is issued in a timely manner, thereby reducing the failure rate of the cushion airbag 1 and improving its reliability.

[0068] As a preferred embodiment, as shown in the attached Figures 3 to 5 As shown, a number of pressure-sensitive areas are provided in the middle aisle 52 of the vehicle body floor 5. All the pressure-sensitive areas are evenly distributed along the length direction of the vehicle body floor 5, and the width of each pressure-sensitive area is equal to the width of the middle aisle 52. A load detection module 3 is provided in each pressure-sensitive area. By distributing the load detection modules 3, the entire load of the middle aisle 52 is monitored to ensure that the cushioning airbags 1 can accurately match the aisle contour after coordinated expansion, achieve uniform filling, and achieve better protection effect.

[0069] The working principle of the vehicle floor protection device provided by the present invention is as follows:

[0070] When the collision sampling module 2 detects that the vehicle body has collided, and the load detection module 3 detects that there is no object 15 on the vehicle body floor 5, the control module 4 controls the buffer module to inflate the buffer airbag 1 according to the collision signal fed back by the collision sampling module 2 and the no-load signal fed back by the load detection module 3;

[0071] When the cushion airbag 1 presses against the unlocking rod 10, the cushion airbag 1 pushes the unlocking rod 10 upward by expanding, and the unlocking rod 10 moves toward the flip cover 6 under the guidance of the suspension rod 11, so that the unlocking rod 10 and the locking rod 12 are staggered in the height direction of the storage groove 51, and the unlocking rod 10 and the locking rod 12 are disengaged, and the flip cover 6 is unlocked. Figure 9 As shown; the cushioning airbag 1 and the push spring 13 together push the flip cover 6 upward and continue upward, as shown in the attached Figure 10 As shown, the sliding rod 8 slides upward along the guide hole 71 from the lowest position to the highest position, the flip cover 6 and the rotating shaft 9 slide upward synchronously with the sliding rod 8, after the rotating shaft 9 exceeds the receiving groove 51, the flip cover 6 rotates around the rotating shaft 9 from the first position to the second position;

[0072] When the cushioning airbag 1 expands and fills the middle aisle 52 of the vehicle body floor 5, as shown in the attached Figure 11 As shown, the cushioning airbag 1 pushes the locking rod 12 to rotate around the rotation axis 14 in the direction away from the flip cover 6 until the locking rod 12 is in contact with the vehicle floor 5. Figure 12 shown.

[0073] The present invention also provides a rail vehicle comprising the above-mentioned vehicle body floor protection device, which has the same beneficial effects.

[0074] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0075] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A vehicle floor protection device, characterized in that: The invention comprises a buffer module, a collision sampling module (2), a load detection module (3) and a control module (4); the buffer airbag (1) of the buffer module is accommodated in a receiving slot (51) of a vehicle body floor (5); a notch of the receiving slot (51) is provided with a flip cover (6); the collision sampling module (2) is used to detect whether a collision occurs on the vehicle body; the load detection module (3) is used to detect whether there is a carrying object (15) on the vehicle body floor (5); When the collision sampling module (2) detects that the vehicle body has collided, and the load detection module (3) detects that there is no carrying object (15) on the vehicle body floor (5), the control module (4) controls the buffer module to inflate the buffer airbag (1) according to the collision signal fed back by the collision sampling module (2) and the no-load signal fed back by the load detection module (3), and the buffer airbag (1) pushes open the flip cover (6) by expansion, and controls the buffer module to continue to inflate the buffer airbag (1) after the flip cover (6) is opened, until the buffer airbag (1) is expanded and filled into the middle aisle (52) of the vehicle body floor (5).

2. The vehicle floor protection device according to claim 1, characterized in that: A support rod (7) is fixedly provided on one side of the receiving groove (51), and a guide hole (71) is formed on the support rod (7). The guide hole (71) extends along the depth direction of the receiving groove (51), and a sliding rod (8) is slidably provided in the guide hole (71). The sliding rod (8) is hingedly connected to the flip cover (6) via a rotating shaft (9); When the cushioning airbag (1) is stored in the storage groove (51), the sliding rod (8) is at the lowest position of the guide hole (71), the flip cover (6) stays at the first position, the rotating shaft (9) is located in the storage groove (51), and the flip cover (6) remains flush with the vehicle body floor (5); When the cushioning airbag (1) pushes open the flip cover (6), the sliding rod (8) slides upward from the lowest position to the highest position along the guide hole (71) under the push of the cushioning airbag (1), and after the rotating shaft (9) exceeds the receiving groove (51), the flip cover (6) rotates from the first position to the second position.

3. The vehicle floor protection device according to claim 2, characterized in that: An unlocking rod (10) is provided on the side of the flip cover (6) facing the receiving slot (51), and at least two suspension rods (11) are slidably provided between the unlocking rod (10) and the flip cover (6); a locking rod (12) is provided on the end of the flip cover (6) away from the sliding rod (8); When the cushioning airbag (1) is received in the receiving groove (51), the unlocking rod (10) abuts against the locking rod (12), and the flip cover (6) is locked; When the cushioning airbag (1) presses against the unlocking rod (10), the unlocking rod (10) moves toward the flip cover (6) under the guidance of the suspension rod (11), the unlocking rod (10) is disengaged from the locking rod (12), and the flip cover (6) is unlocked.

4. The vehicle floor protection device according to claim 3, characterized in that: One end of the unlocking rod (10) is provided with an abutting inclined surface (101), and the abutting inclined surface (101) is inclined in a direction away from the locking rod (12); one end of the locking rod (12) facing the unlocking rod (10) is provided with a limiting inclined surface (121); when the unlocking rod (10) and the locking rod (12) abut against each other, the abutting inclined surface (101) and the limiting inclined surface (121) abut against each other to form a wedge-shaped fit.

5. The vehicle floor protection device according to claim 3, characterized in that: A mounting groove is formed on a side of the receiving groove (51) away from the support rod (7), and a push spring (13) is provided in the mounting groove; When the unlocking rod (10) abuts against the locking rod (12), the locking rod (12) presses the push spring (13) into the installation groove; When the unlocking rod (10) is out of contact with the locking rod (12), the pushing spring (13) pushes the flip cover (6) to flip from the first position to the second position via the locking rod (12).

6. The vehicle floor protection device according to claim 3, characterized in that: The locking rod (12) and the flip cover (6) are hingedly connected via a rotating shaft (14); when the cushioning airbag (1) abuts against the locking rod (12) in the middle aisle (52), the cushioning airbag (1) pushes the locking rod (12) to rotate around the rotating shaft (14) in a direction away from the flip cover (6) until the locking rod (12) is in contact with the vehicle body floor (5).

7. The vehicle floor protection device according to any one of claims 1 to 6, characterized in that: The buffer assembly comprises an inflation tube connected to the buffer airbag (1), an inflation valve provided on the inflation tube, and a compressed air tank connected to the inflation tube; and also comprises an air pressure detection module for detecting the current air pressure of the buffer airbag (1); When the control module (4) receives the collision signal and the no-load signal, the control module (4) controls the inflation valve to open, and the compressed gas tank inflates the buffer gas tank through the inflation pipe; When the air pressure detection module detects that the current air pressure exceeds the set air pressure, the control module (4) closes the inflation valve according to the shut-off signal fed back by the air pressure detection module.

8. The vehicle floor protection device according to claim 7, characterized in that: It also includes a fault alarm module and a timing module, wherein the timing module is used to record the inflation time of the cushioning airbag (1); When the inflation time of the cushion airbag (1) recorded by the timing module reaches the set time, the control module (4) determines whether the current air pressure fed back by the air pressure detection module exceeds the set air pressure based on the time signal fed back by the timing module, and if not, activates the fault alarm module.

9. The vehicle floor protection device according to any one of claims 1 to 6, characterized in that: A plurality of pressure-sensing areas are provided in the middle aisle (52) of the vehicle body floor (5), all of the pressure-sensing areas are evenly distributed along the length direction of the vehicle body floor (5), and the width of each pressure-sensing area is equal to the width of the middle aisle (52); and each pressure-sensing area is provided with one load detection module (3).

10. A rail vehicle, characterized in that: The vehicle body floor protection device comprises the vehicle body floor protection device according to any one of claims 1 to 9.

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