Vehicle bottom door locking state monitoring device

Abstract

The invention discloses a vehicle bottom door locking state monitoring device, and relates to the technical field of vehicle door locking monitoring. The rotating shaft is rotatably connected to the bottom of the vehicle body and connected with a box door, a driving plate is arranged on the box door, a driving piece is arranged at one end of the rotating shaft and connected with a generator arranged on the side wall of the vehicle body through a transmission assembly, the generator communicates with a first conductive block, and a second conductive block is arranged on the side, close to the box door, of the first conductive block; the second conductive block is fixed to one end of the moving rod, the moving rod slides in the height direction of the vehicle body, the extending direction of the moving rod is the same as the sliding direction, the other end of the moving rod abuts against the driving plate, and the second conductive block is connected with a prompting device, so that workers can conveniently observe the closing condition of the box door, and the monitoring efficiency and precision of the closing of the box door are improved.

Description

Technical Field

[0001] The invention relates to the technical field of locking state monitoring, and in particular to a locking state monitoring device for a vehicle bottom door. Background Art

[0002] A hopper car is a transport vehicle with a hopper plate at the bottom of the vehicle body. It can be divided into two types according to the structure: covered and uncovered. It is often used in industries such as coal coking and metal smelting to transport production materials, such as quenching cars, hot sintering ore cars, hopper-type weighing cars, etc. During the unloading process of the hopper car, the bottom hopper plate is opened to form an inclined surface, and the goods slide down and are unloaded under their own weight. In actual use, after the hopper car is unloaded, the unloading door needs to be closed, and the staff needs to observe with the naked eye whether the box door is closed. Since the gap of the box door is at a low position, the staff needs to bend down and walk for a long time to observe. The inspection method is not convenient enough and is detrimental to the health of the staff. In addition, it is impossible to detect tiny gaps through naked eye observation, and production raw materials leak out of the gap from the hopper car, which increases unnecessary production costs.

[0003] In summary, it can be seen that developing a vehicle bottom door locking state monitoring device that is convenient for staff to monitor and has accurate monitoring effect is a problem that needs to be solved urgently by technical personnel in this field. Summary of the invention

[0004] The purpose of the present invention is to provide a vehicle bottom door locking state monitoring device, which solves the problem of inconvenience in manually monitoring the bottom door gap of an open vehicle and inaccurate monitoring results.

[0005] To achieve the above object, the present invention provides a vehicle bottom door locking state monitoring device, comprising:

[0006] Vehicle body;

[0007] A rotating shaft rotatably connected to the bottom of the vehicle body, the rotating shaft is connected to a box door, a driving plate is provided on the box door, a driving member is provided at one end of the rotating shaft, the driving member is connected to a generator arranged on the side wall of the vehicle body through a transmission assembly, the generator is communicated with a first conductive block, a second conductive block is provided on the side of the first conductive block close to the box door, the second conductive block is fixed to one end of a moving rod, the moving rod slides along the height direction of the vehicle body, the extending direction of the moving rod is the same as the sliding direction, the other end of the moving rod abuts against the driving plate, and the second conductive block is connected to a prompt device.

[0008] Preferably, a hydraulic rod is provided at the bottom of the vehicle body, and there are two rotating shafts. One end of the hydraulic rod is fixedly connected between the two rotating shafts, and the other end of the hydraulic rod is rotatably connected to each box door through a rotating block.

[0009] Preferably, the transmission assembly includes a linkage member and a transmission shaft. The transmission shaft is located on the same side as the generator and is parallel to the moving rod. The linkage member is specifically two bevel gears. One bevel gear is arranged on the side of the driving member away from the rotating shaft, and the other bevel gear is arranged on the end of the moving rod close to the box door. The two bevel gears are meshed, and the transmission shaft moves synchronously with the driving member.

[0010] Preferably, the generator has a connecting shaft, a ratchet is provided at the end of the transmission shaft away from the box door, a connecting groove is provided inside the connecting shaft, the connecting groove cooperates with the teeth of the ratchet, and the ratchet rotates unidirectionally in the connecting groove. When the box door is opened, the ratchet rotates relative to the connecting groove, and when the box door is closed, the ratchet is locked with the connecting groove, so that the transmission shaft rotates together with the connecting shaft.

[0011] Preferably, the first conductive block is provided with a limiting groove at one end close to the box door, and the second conductive block is provided with a limiting block. When the first conductive block and the second conductive block are in contact, the limiting block extends into the limiting groove to lock the positions of the first conductive block and the second conductive block.

[0012] Preferably, the moving rod is slidably connected to the vehicle body through an elastic member, and when the elastic member is in a relaxed state, the first conductive block is separated from the second conductive block, and one end of the moving rod abutting against the driving plate extends out of the box door.

[0013] Preferably, a fixing plate is provided at one end of the elastic member facing away from the door, the moving rod is passed through the fixing plate, and the fixing plate is perpendicular to the elastic member and the moving rod.

[0014] Preferably, the prompt device is specifically an alarm light and a sensor, and a battery is also connected between the first conductive block and the generator. The battery is connected to each generator through an input line, and the battery is also connected to each first conductive block through a first output line, so that the second conductive block is connected to the alarm light and the sensor through a second output line.

[0015] Preferably, the extension directions of the hydraulic rods are parallel to each other and perpendicular to the rotating shaft, the extension direction of the rotating shaft is perpendicular to the transmission shaft, the extension direction of the transmission shaft is the height direction of the vehicle body, the transmission shaft is parallel to the moving rod, the first conductive block and the second conductive block are symmetrically distributed on both sides of the battery, and the generator is arranged on the side wall between the battery and the linkage.

[0016] Preferably, an insulating pad is bonded to one end of the movable rod abutting against the second conductive block, the insulating pad and the second conductive block are in contact with each other, one end of the first conductive block is fixed to the side wall of the vehicle body through the insulating block, the side wall of the vehicle body has multiple protection boxes, each protection box covers each generator, transmission shaft, first conductive block, second conductive block and the outside of the movable rod respectively, and the alarm light and sensor are fixed to the vehicle body through the mounting rod.

[0017] With respect to the above-mentioned background technology, the vehicle bottom door locking state monitoring device provided by the present invention includes a vehicle body, a rotating shaft is provided on the inner side of the bottom plate of the vehicle body, the rotating shaft can rotate relative to the vehicle body, and box doors are extended from the rotating shaft to the side walls at both ends of the vehicle body, the box doors can rotate with the rotating shaft, and a driving plate is extended on the box door, the driving plate extends through the plane where the side wall of the vehicle body is located, a driving member is provided at one end of the rotating shaft, the driving member is coaxially arranged with the rotating shaft, the driving member is connected to the generator on the side wall of the vehicle body through a transmission assembly, after the driving member rotates, the generator generates electrical energy through the transmission assembly, the generator is connected to a first conductive block fixed on the same side wall, a moving rod is slidably connected to the side wall between the first conductive block and the box door, a second conductive block is provided at the end of the moving rod facing away from the box door, and the other end is abutted against the driving plate, and in addition, the second conductive block is connected to a prompt device.

[0018] When the box door is opened, the moving rod slides to the side close to the box door, the first conductive block is separated from the second conductive block, the locking status detection device of the open car bottom door is disconnected, and the prompt device does not operate. When the staff closes the box door of the car body, the box door drives the rotating shaft to rotate, and the driving member rotates together with the rotating shaft. The generator connected to the driving member through the transmission assembly rotates synchronously, and the generator generates electrical energy. When the box door is fully closed, the driving plate pushes the moving rod in contact with it, and the moving rod lifts the second conductive block and fits the first conductive block to form a connected circuit between the generator, the second conductive block, and the prompt device. The prompt device works to remind the staff that the box door is fully closed. If the box door is not fully closed, the driving plate does not contact the moving rod or the driving plate does not push the moving rod enough, the first conductive block is separated from the second conductive block, and the electrical energy generated by the generator cannot be transmitted to the prompt device, and the prompt device cannot operate. The staff can understand that the box door is not fully closed through the status of the prompt device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0020] Figure 1 1 is a schematic structural diagram of a vehicle bottom door locking state monitoring device provided by an embodiment of the present invention;

[0021] Figure 2 1 is a schematic diagram of the structure of the vehicle bottom door locking state monitoring device provided by an embodiment of the present invention after the protection box is hidden;

[0022] Figure 3 is a bottom view of a vehicle bottom door locking state monitoring device provided by an embodiment of the present invention;

[0023] Figure 4 It is a schematic diagram of the structure of the vehicle bottom door locking state monitoring device provided by an embodiment of the present invention after the protection box and the vehicle body are hidden;

[0024] Figure 5 yes Figure 4 A schematic diagram of the enlarged structure of the middle A area;

[0025] Figure 6 It is a schematic diagram of the assembly structure of the rotating shaft and the transmission shaft provided in an embodiment of the present invention;

[0026] Figure 7 yes Figure 6 Schematic diagram of the enlarged structure of the middle B area;

[0027] in:

[0028] 1-body; 2-hydraulic rod; 3-rotating block; 4-rotating shaft; 5-box door; 6-driving member; 7-linkage member; 8-transmission shaft; 9-connecting shaft; 10-ratchet; 11-connecting slot; 12-generator; 13-battery; 14-input line; 15-first output line; 16-first conductive block; 17-elastic member; 18-moving rod; 19-second conductive block; 20-limiting block; 21-driving plate; 22-installing rod; 23-second output line; 24-warning light; 25-sensor; 26-protection box. DETAILED DESCRIPTION

[0029] 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.

[0030] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0031] Please refer to the instruction manual Figure 1 To Attachment Figure 7The vehicle bottom door locking state monitoring device includes a vehicle body 1, which can be set as a square coverless shell. A rotating shaft 4 is provided on the inner side of the lower end surface of the vehicle body 1. The rotating shaft 4 extends to a box door 5 toward the side wall of the vehicle body 1. The box door 5 is fixedly connected to the rotating shaft 4 and can rotate with the rotating shaft 4. In addition, a driving plate 21 is provided on the box door 5. The driving plate 21 and the box door 5 are located in the same plane, and the driving plate 21 extends out of the side plate of the vehicle body 1. A driving member 6 is connected to one end of the rotating shaft 4. The driving member 6 is specifically a circular turntable. The driving member 6 is coaxially arranged with the rotating shaft 4. The driving member 6 is located on the outer side of the side wall of the vehicle body 1 and is connected to a generator 12 on the side wall of the vehicle body 1 through a transmission assembly. The rotor of the generator 12 is connected to the transmission assembly. When the rotating shaft 4 drives the rotor in the generator 12 to rotate through the transmission assembly, the generator 12 generates electrical energy. In addition, The generator 12 is connected to a first conductive block 16, and a moving rod 18 is slidably connected to the side wall between the first conductive block 16 and the box door 5. A second conductive block 19 is provided on the side of the moving rod 18 close to the first conductive block 16, and the other end corresponds to the driving plate 21, wherein the extending direction of the moving rod 18 is the height direction of the vehicle body 1, and the sliding direction of the moving rod is consistent with its extending direction. When the moving rod 18 slides downward, the first conductive block 16 fixed on the moving rod 18 moves together, so that the first conductive block 16 is separated from the second conductive block, and the vehicle bottom door locking state monitoring device is in an open circuit state as a whole. The moving rod 18 slides upward, the second conductive block 19 is lifted, the first conductive block 16 is in contact with the second conductive block 19, and the monitoring device is a closed loop. A prompt device is connected to the second conductive block 19 to display the closed state of the box door 5.

[0032] Since the driving plate 21 corresponds to the moving rod 18, that is, when the driving plate 21 moves with the box door 5, the driving plate 21 can contact the moving rod 18, and the moving rod 18 can be pushed by the driving plate 21. When the box door 5 is fully closed, the driving plate 21 pushes the moving rod 18 to a greater extent, and the second conductive block 19 fits with the first conductive block 16. The electric energy generated by the rotation of the box door 5 can be transmitted to the alarm light 24. The alarm light 24 works to remind the operator that the box door 5 is fully closed. If the box door 5 is not fully closed, the driving plate 21 does not push the moving rod 18 far enough, so that the first conductive block 16 is separated from the second conductive block 19, and the electric energy generated by the generator 12 cannot be transmitted to the prompt device. The prompt device does not work, and the staff can easily tell that the box door 5 is not fully closed.

[0033] There are two box doors 5 in the vehicle body 1, and naturally there are also two rotating shafts 4 connected to the box doors 5. The two rotating shafts 4 are arranged on both sides of the symmetry axis in the length direction of the bottom end of the vehicle body 1, and the two rotating shafts 4 are close to the symmetry axis. A hydraulic rod 2 is fixedly connected between the two rotating shafts 4. In order to balance the force on the box door 5, a hydraulic rod 2 is provided at both ends of each box door 5. The other end of the hydraulic rod 2 is rotatably connected to a rotating block 3, and the rotating block 3 is fixed on one end of the box door 5 close to the side wall. The hydraulic rod 2 contracts and drives the rotating block 3 to rotate, and the box door 5 connected to the rotating block 3 opens accordingly. The setting direction of the hydraulic rod 2 is perpendicular to the rotating shaft 4, so that when the extension and retraction distance of the hydraulic rod 2 is the same, the rotation angle of the box door 5 is maximized, thereby shortening the time required to open or close the box door 5.

[0034] The transmission assembly includes a transmission shaft 8 and a linkage member 7. The rotation direction of the driving member 6 is perpendicular to the bottom of the vehicle body 1, and the rotation direction of the transmission shaft 8 is parallel to the bottom of the vehicle body 1. If the two movements are to be synchronized, the transmission shaft 8 and the driving member 6 are matched through the linkage member 7. The linkage member 7 is specifically a bevel gear. A bevel gear is arranged on the side of the driving member 6 away from the rotating shaft 4, and the axis of the bevel gear coincides with the axis of the driving member 6. Similarly, a bevel gear is arranged on the end of the transmission shaft 8 close to the box door 5, and the axis of the bevel gear coincides with the axis of the transmission shaft 8. The teeth of the two bevel gears are meshed with each other. At this time, the rotation axes of the two bevel gears are perpendicular to each other, and the driving member 6 and the transmission shaft 8 connected to each bevel gear can move synchronously.

[0035] In some embodiments, the cargo in the open car needs to be unloaded from the open car door 5. During this process, the open car bottom door closure monitoring device does not need to be operated. To avoid the open car bottom door closure monitoring device from operating during unloading, please refer to the attached manual. Figure 4 To the attached Figure 7 , with Figure 4Taking the components in the middle A area as an example, a battery 13 is connected between the generator 12 and the first conductive block 16, a ratchet 10 is provided at one end of the transmission shaft 8 close to the generator 12, the ratchet 10 is made of rigid material, and the gear teeth on the same ratchet 10 are all arc plates bent in the same direction, and the engine is provided with a connecting shaft 9 at one end close to the rotating shaft 4, a connecting groove 11 is provided inside the connecting shaft 9, and a baffle is provided on the inner side wall of the connecting groove 11, and the baffle is made of elastic material, which can be specifically spring steel. The bending direction of each baffle is opposite to the bending direction of the teeth of the ratchet wheel 10. When the ratchet wheel 10 is inserted into the connecting groove 11, the arc-shaped teeth of the ratchet wheel 10 are arranged between the baffles. When the hydraulic rod 2 opens the box door 5, the rotating shaft 4 rotates, and the transmission shaft 8 moves with the rotating member through the linkage member 7. The ratchet wheel 10 arranged at the upper end of the transmission shaft 8 rotates, and the tooth tips of the teeth of the ratchet wheel 10 are attached to the side surface of the inner arc of the baffle, and the teeth squeeze the baffle to deform the baffle, and the baffle moves toward the inner wall of the connecting groove 11 One side moves closer until the tip of the gear tooth slides out of the baffle. In this process, only the ratchet 10 rotates relative to the connecting groove 11, and the connecting shaft 9 in which the connecting groove 11 is set is stationary. That is to say, during the process of opening the box door 5, the generator 12 cannot generate electrical energy, preventing the connecting shaft 9 from reversing, causing the generator 12 to reversely charge the battery 13. The electrical energy generated during the closing process is offset, resulting in a delayed monitoring effect or an inability to monitor. When the box door 5 is closed, the outer arc surface of the ratchet 10 teeth abuts against the outer arc surface of the baffle. As the ratchet 10 rotates, the ratchet 10 teeth further slide into the angle formed by the baffle and the connecting groove 11, so that the ratchet 10 is engaged with the connecting groove 11, and the connecting piece can move with the transmission shaft 8. The connecting shaft 9 drives the generator 12 rotor to rotate, and the generator 12 generates electrical energy. The prompting device is specifically an alarm light 24 and a sensor 25. The electrical energy is transmitted to the alarm light 24 and the sensor 25. The alarm light 24 and the sensor 25 prompt the worker that the box door 5 is completely closed.

[0036] In addition, a limit block 20 is provided on the side of the second conductive block 19 away from the moving rod 18, and the size of the limit block 20 gradually shrinks toward the side close to the conductive block. The first conductive block 16 is provided with a limit groove at the position corresponding to the limit block 20, and the port of the limit groove faces the second conductive block 19. When the staff completely closes the box door 5, the side wall of the tapered portion of the limit block 20 can slide with the limit groove, and the auxiliary limit block 20 accurately extends into the limit groove. The limit block 20 is engaged with the limit groove to lock the connection state of the first conductive block 16 and the second conductive block 19, thereby avoiding the first conductive block and the second conductive block 19 from offsetting and causing the contact area to become smaller, and the electric energy of the battery 13 cannot be transmitted to the alarm light 24 and the sensor 25, resulting in errors in the monitoring results of the vehicle bottom door locking state monitoring device.

[0037] In the circuit loop in which the generator 12 generates electric energy and transmits the electric energy to the alarm light 24 and the sensor 25, since there are two doors 5, there are also two generators 12 that generate electric energy by rotating the shaft 4. Each generator 12 is connected to a battery 13 through an input line 14. The battery 13 is square in shape. Since the generator 12 is located at the lower end of the battery 13, the input line 14 is connected to the bottom of the battery 13. Since the alarm light 24 is arranged on the side walls of the battery 13, the battery 13 extends first output lines 15 from both ends, respectively. Each first output line 15 is connected to the first conductive blocks 16 on both sides of the battery 13, and can be connected to the first conductive blocks 16. A second output line 23 is connected to the lower side of the second conductive block 19, and the second output line 23 is connected to the alarm light 24. When the box door 5 is closed, the connecting shaft 9 drives the rotor of the generator 12 to rotate, and the generator 12 generates electrical energy, which is transmitted to the battery 13 through the input line 14. When the box door 5 is completely closed, the driving plate 21 pushes the moving rod 18 to make the first conductive block 16 fit with the second conductive block 19, and the electrical energy is transmitted from the battery 13 to the first conductive block 16 through the first output line 15. Then, the second conductive block 19 that is fitted with the first conductive block 16 receives the electrical energy and transmits it to the alarm light 24 through the second output line 23. The alarm light 24 operates to remind the staff that the box door 5 is completely closed.

[0038] The elastic member 17 is fixedly connected to the side wall of the vehicle body 1. The elastic member 17 is specifically a tension spring, and the tension direction is consistent with the extension direction of the length of the moving rod 18. The elastic member 17 is provided with a fixing plate at the end away from the box door 5. The elastic member 17 is located at one end of the fixing plate, and the moving rod 18 is penetrated at the other end. The fixing plate is perpendicular to the elastic member 17 and the moving rod 18 respectively. When the elastic member 17 is in a relaxed state, there is a gap between the second conductive block 19 fixedly connected to one end of the moving rod 18 and the first conductive block 16, and the other end extends out of the plane where the box door 5 is located. When the door 5 is closed, the extended part of the moving rod 18 abuts against the driving plate 21 on the door 5 and is pushed, pushing the extended part of the moving rod back to the inside of the side wall. Because the moving rod 18 is a rigid rod, the second conductive block 19 at the other end is also lifted by the same distance. When the elastic member 17 is in a relaxed state, the spacing between the first conductive block 16 and the second conductive block is the same as the length of the moving rod 18 along the extended side wall. The door 5 is completely closed, that is, the extended part of the moving rod 18 is completely pushed back to the inside of the side wall, and the first conductive block 16 fits with the second conductive block 19.

[0039] The hydraulic rod 2 is set in a direction perpendicular to the rotating shaft 4, so that the hydraulic rod 2 can adjust the angle of the box door 5 to the maximum extent after extending and retracting the same distance. The two rotating shafts 4 are parallel to each other, and the transmission shafts 8 connected to the rotating shafts 4 are also parallel to each other. An insulating pad is bonded to one end of the moving rod 18 abutting against the second conductive block 19, and the insulating pad is in contact with the second conductive block 19. One end of the first conductive block 16 is fixed to the side wall of the vehicle body 1 through the insulating block. The first conductive block 16 and the second conductive block 19 are fixedly connected by insulating materials to avoid short circuits with other metal parts, so that the vehicle bottom door locking state monitoring device fails. A plurality of protection boxes 26 are provided on one side of the vehicle body 1, and each protection box 26 covers the outside of each generator 12, the transmission shaft 8, the first conductive block 16, the second conductive block 19 and the moving rod 18 respectively. The alarm light 24 and the sensor 25 are fixed to one end of the side wall of the vehicle body 1 close to the box door 5 through the mounting rod 22. Each protection box 26 prevents the power supply line from being damaged by the external environment, thereby extending the service life of the open car bottom door closing state monitoring device.

[0040] 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.

[0041] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A vehicle bottom door locking state monitoring device, characterized in that: include: Car body (1); A rotating shaft (4) is rotatably connected to the bottom of the vehicle body (1), the rotating shaft (4) is connected to a box door (5), a driving plate (21) is provided on the box door (5), a driving member (6) is provided at one end of the rotating shaft (4), the driving member (6) is connected to a generator (12) provided on the side wall of the vehicle body (1) through a transmission assembly, the generator (12) is communicated with a first conductive block (16), a second conductive block (19) is provided on a side of the first conductive block (16) close to the box door (5), the second conductive block (19) is fixed to one end of a moving rod (18), the moving rod (18) slides along the height direction of the vehicle body (1), the extending direction of the moving rod (18) is the same as the sliding direction, the other end of the moving rod (18) abuts against the driving plate (21), and the second conductive block (19) is connected to a prompt device.

2. The vehicle bottom door locking state monitoring device according to claim 1, characterized in that: A hydraulic rod (2) is provided at the bottom of the vehicle body (1), and there are two rotating shafts (4). One end of the hydraulic rod (2) is fixedly connected between the two rotating shafts (4), and the other end of the hydraulic rod (2) is rotatably connected to each of the box doors (5) via a rotating block (3).

3. The vehicle bottom door locking state monitoring device according to claim 1, characterized in that: The transmission assembly comprises a linkage member (7) and a transmission shaft (8). The transmission shaft (8) and the generator (12) are located on the same side and are parallel to the moving rod (18). The linkage member (7) is specifically two bevel gears, one bevel gear is arranged on the side of the driving member (6) away from the rotating shaft (4), and the other bevel gear is arranged on the end of the moving rod (18) close to the box door (5). The two bevel gears are meshed, and the transmission shaft (8) moves synchronously with the driving member (6).

4. The vehicle bottom door locking state monitoring device according to claim 3, characterized in that: The generator (12) has a connecting shaft (9), and a ratchet (10) is provided at one end of the transmission shaft (8) away from the box door (5). A connecting groove (11) is provided inside the connecting shaft (9), and a baffle in the connecting groove (11) cooperates with the gear teeth of the ratchet (10). The ratchet (10) rotates unidirectionally in the connecting groove (11). When the box door (5) is opened, the ratchet (10) rotates relative to the connecting groove (11). When the box door (5) is closed, the ratchet (10) is locked with the connecting groove (11), so that the transmission shaft (8) rotates together with the connecting shaft (9).

5. The vehicle bottom door locking state monitoring device according to claim 4, characterized in that: The first conductive block (16) is provided with a limiting groove at one end close to the box door (5), and the second conductive block (19) is provided with a limiting block (20). When the first conductive block (16) and the second conductive block (19) are in contact with each other, the limiting block (20) extends into the limiting groove to lock the positions of the first conductive block (16) and the second conductive block (19).

6. The vehicle bottom door locking state monitoring device according to claim 5, characterized in that: The moving rod (18) is slidably connected to the vehicle body (1) via an elastic member (17); when the elastic member (17) is in a relaxed state, the first conductive block (16) and the second conductive block (19) are separated, and one end of the moving rod (18) abutting against the driving plate (21) extends out of the box door (5).

7. The vehicle bottom door locking state monitoring device according to claim 6, characterized in that: A fixing plate is provided at one end of the elastic member (17) facing away from the box door (5), the moving rod (18) passes through the fixing plate, and the fixing plate is perpendicular to the elastic member (17) and the moving rod (18).

8. The vehicle bottom door locking state monitoring device according to claim 7, characterized in that: The prompt device is specifically an alarm light (24) and a sensor (25); a battery (13) is also connected between the first conductive block (16) and the generator (12); the battery (13) is connected to each of the generators (12) via an input line (14); the battery (13) is also connected to each of the first conductive blocks (16) via a first output line (15); and the second conductive block (19) is connected to the alarm light (24) and the sensor (25) via a second output line (23).

9. The vehicle bottom door locking state monitoring device according to claim 8, characterized in that: The extension directions of the hydraulic rods (2) are parallel to each other and perpendicular to the rotating shaft (4); the extension direction of the rotating shaft (4) is perpendicular to the transmission shaft (8); the extension direction of the transmission shaft (8) is the height direction of the vehicle body (1); the transmission shaft (8) is parallel to the moving rod (18); the first conductive block (16) and the second conductive block (19) are symmetrically distributed on both sides of the battery (13); and the generator (12) is arranged on a side wall between the battery (13) and the linkage member (7).

10. The vehicle bottom door locking state monitoring device according to any one of claims 1 to 9, characterized in that: The movable rod (18) is bonded with an insulating pad at one end thereof abutting against the second conductive block (19), and the insulating pad and the second conductive block (19) are in contact with each other. One end of the first conductive block (16) is fixed to the side wall of the vehicle body (1) through the insulating block. The side wall of the vehicle body (1) has a plurality of protection boxes (26), and each of the protection boxes (26) covers the outer side of each of the generators (12), the transmission shaft (8), the first conductive block (16), the second conductive block (19) and the movable rod (18). The warning light (24) and the sensor (25) are fixed to the vehicle body (1) through a mounting rod (22).

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