Tidal seating for rail vehicles and control method

Abstract

The tide seat of the rail vehicle comprises a drive control assembly installed on a seat framework and controlled by a rail vehicle control system, a seat plate assembly hinged to the seat framework and in transmission connection with the drive control assembly, the seat plate assembly moving with the transmission of the drive control assembly, the drive control assembly comprising a drive motor, a controller controlling the operation of the drive motor and connected with a power supply of the rail vehicle, a speed reducer connected with the drive motor and a screw nut assembly connected with an output end of the speed reducer, the controller being in signal transmission connection with the rail vehicle control system, the seat plate assembly comprising a gear assembly engaged with the screw nut assembly and a seat plate fixed with the gear assembly, the gear assembly being hinged to the seat framework and driving the seat plate to unfold downward or fold upward with the movement of the screw nut assembly. The tide seat has stable and reliable self-locking function, improving the reliability and safety of the automatic folding of the seat. The tide seat also provides a control method of the tide seat of the rail vehicle.

Description

Technical Field

[0001] This invention relates to a tidal seat for rail vehicles and its control method, belonging to the field of automatic folding control technology for rail vehicle seats. Background Technology

[0002] Traditional rail vehicles, such as subways and light rail vehicles, mostly have fixed seats, which occupy a large passenger compartment area. During peak hours, the seats cannot be moved, resulting in insufficient space for large numbers of passengers. Reversible seating, or automatically folding seats, can be folded and locked during peak hours to free up space and increase passenger capacity; during off-peak hours, the seats can be unfolded for passenger use. Existing automatic folding seat technologies often suffer from complex structures, poor stability, and high costs in achieving locking when the seat is flat or flipped up. For example, CN106333536A discloses an automatic folding seat, including a rotatable seat, a locking system, and a controller for controlling the seat rotation. The locking system includes an upper locking device and a lower locking device; when the seat is rotated to a flat position, the upper locking device automatically locks the seat; when the seat is rotated to a flipped-up position, the lower locking device automatically locks the seat. The drive mechanism for the folding seats in the aforementioned patent does not achieve self-locking. Instead, it uses upper and lower locking devices to lock the seat after it has been unfolded or folded into place. These locking devices are complex in structure and occupy a large amount of space. Furthermore, many existing automatic folding seats are driven by motors. Low-power motors have insufficient torque to meet the seat's movement requirements. While increasing the motor power can increase the output torque, it also increases the heat generated. Insufficient heat dissipation can damage the internal structure of the seat, reducing its safety performance. Summary of the Invention

[0003] The tidal seat for rail vehicles and its control method provided by this invention have a stable and reliable self-locking function. After the drive motor stops running, the self-locking of the screw and nut assembly realizes the self-locking of the seat position, eliminating the need for additional locking devices, simplifying the internal structure of the seat. By utilizing the large transmission ratio of the combination of the screw and nut assembly and the gear assembly, a relatively large torque can be output from a small-power motor, reducing the output power of the drive motor, thereby reducing the heat generated by the drive motor during operation and improving the reliability and safety of the automatic folding of the seat.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A tidal seat for a rail vehicle includes a drive control assembly mounted on a seat frame and controlled by a rail vehicle control system, and a seat plate assembly hinged to the seat frame and driven by the drive control assembly. The seat plate assembly moves with the drive control assembly. The drive control assembly includes a drive motor, a controller that controls the drive motor and is connected to the rail vehicle's power supply, a reducer connected to the drive motor, and a lead screw and nut assembly connected to the output end of the reducer. The controller is connected to the rail vehicle control system for signal transmission. The seat plate assembly includes a gear assembly meshing with the lead screw and nut assembly and a seat plate fixed to the gear assembly. The gear assembly is hinged to the seat frame and, with the movement of the lead screw and nut assembly, causes the seat plate to unfold downwards or fold upwards.

[0005] Preferably, the output end of the reducer is connected to the lead screw and nut assembly via a torque sensor. The torque sensor is connected to the controller for signal transmission. The lead screw and nut assembly includes a lead screw coaxially connected to the output end of the torque sensor and a transmission nut mounted on the lead screw. The transmission nut meshes with the gear assembly and drives the gear assembly to rotate as the lead screw moves.

[0006] Preferably, the transmission nut is cuboid in shape, and a guide keyway parallel to the lead screw is provided on the transmission nut. A guide key that guides and cooperates with the guide keyway is fixed on the seat frame. The upper end of the lead screw is connected to the torque sensor, and the lower end is pressed into the bearing on the seat frame.

[0007] Preferably, the side of the transmission nut opposite to the gear assembly is a rack surface. The gear assembly includes a gear meshing with the rack surface and a rotating shaft fixed coaxially with the gear. The rotating shaft is hinged to the seat frame, and the inner end of the seat plate is fixed to the rotating shaft.

[0008] Preferably, the gear is integrally formed from a semi-circular toothed disc and a small semi-circular disc. The small semi-circular disc is arranged opposite to the semi-circular toothed disc and their centers coincide. The diameter of the small semi-circular disc is smaller than the diameter of the semi-circular toothed disc. A gear limiting surface is formed between the semi-circular toothed disc and the small semi-circular disc. The circumference of the semi-circular toothed disc has teeth that mesh with the rack surface. The seat frame has a support rod that supports the seat plate when it is unfolded downwards. The support rod is located below the seat plate. When the gear limiting surface abuts against the support rod as the gear rotates, it limits the gear.

[0009] Preferably, the support rod is equipped with a seat plate limit switch that can contact the bottom surface of the seat plate and a gear limit switch that can contact the gear limit surface. The seat plate limit switch and the gear limit switch are respectively connected to the controller for signal transmission.

[0010] Preferably, the upper end of the drive motor has a manual hexagonal shaft coaxially connected to the motor shaft, and the lead screw nut assembly can move with the rotation of the manual hexagonal shaft.

[0011] Preferably, it also includes a power converter that can convert the DC110V power supply of the rail vehicle to a DC24V working power supply. The controller is connected to the DCV power supply of the rail vehicle through the power converter. The power converter has an isolation switch to control the power supply to and from the rail vehicle. Signal indicator lights connected to the controller are installed on the seat.

[0012] The control method for the tidal seats of the rail vehicle described above is characterized in that: under normal power-on conditions, the rail vehicle control system sends an unfolding or folding signal to the controller, which controls the drive motor to run, thereby causing the seat plate to unfold downwards or fold upwards. The controller monitors the operating current of the drive motor in real time. When the operating current of the drive motor suddenly increases, the controller first controls the drive motor to stop running, and then controls the drive motor to rotate in the opposite direction to drive the seat plate back to its original position. Under power-off conditions, the drive motor can be manually rotated to cause the seat plate to unfold downwards or fold upwards.

[0013] Preferably, the torque sensor output torque is set when the seat limit switch contacts the seat plate or when the gear limit switch contacts the gear limiting surface. When the seat plate is unfolded downwards, the torque sensor output torque quickly rises to the set torque, and the seat limit switch contacts the bottom surface of the seat plate, sending an unfolding signal to the controller. Based on the monitored set torque signal and unfolding signal, the controller controls the drive motor to stop running, completing the seat plate unfolding downwards. When the seat plate is folded upwards, the torque sensor output torque quickly rises to the set torque, and the gear limit switch contacts the gear limiting surface, sending a folding signal to the controller. Based on the monitored set torque signal and folding signal, the controller controls the drive motor to stop running, completing the seat plate folding upwards.

[0014] The beneficial effects of the invention are: In the tidal seat of the rail vehicle of this invention, the vehicle control system controls the operation of the drive motor through a controller. The torque output by the drive motor is reduced by a reducer and then transmitted to the lead screw and nut assembly. Through the meshing of the lead screw and nut assembly with the gear assembly, the gear assembly is driven to run, thereby causing the seat plate to unfold downwards or fold upwards. The lead screw and nut assembly has a stable and reliable self-locking function. After the drive motor stops running, the self-locking of the lead screw and nut assembly achieves self-locking of the seat plate position, so that the seat plate automatically locks itself after being folded or unfolded into place, eliminating the need for additional locking devices, simplifying the internal structure of the seat, and the drive control component is small in size, has a low space occupation rate, and is easy to install on the seat frame; in the lead screw and nut assembly, the lead screw and nut cooperate to convert the torque into... The linear torque generated by the nut running on the lead screw is converted into a torque that drives the seat plate through the meshing of the lead screw and nut assembly with the gear assembly. This results in two torque conversions. By utilizing the large transmission ratio of the lead screw and nut assembly and gear assembly, a relatively large torque is output from a small-power motor. This reduces the power output from the reducer and increases the torque to meet the torque requirements of the seat movement. This reduces the output power of the drive motor and the operating current of the drive motor, thereby reducing the heat generated by the drive motor during operation. This improves the safety of the drive control components and effectively reduces seat damage caused by drive motor overheating, thus improving the reliability and safety of the automatic seat folding mechanism.

[0015] A torque sensor is connected to the lead screw and nut assembly at the output end of the reducer. The torque sensor transmits the real-time output torque to the controller. When the seat plate is unfolded downwards, it is supported on the support rod and limited. The real-time output torque of the torque sensor rises rapidly, and the bottom surface of the seat plate contacts the seat plate limit switch, sending an unfolding signal to the controller. The controller detects the rapid increase in the real-time output torque of the torque sensor and the unfolding signal, and then controls the drive motor to stop running. When the seat plate is folded upwards, the gear limit surface abuts against the bottom surface of the support rod and is limited. The real-time output torque of the torque sensor rises rapidly, and the gear limit surface contacts the gear limit switch, sending a folding signal to the controller. The controller detects the rapid increase in the real-time output torque of the torque sensor and the folding signal, and then controls the drive motor to stop running. The dual signal monitoring of the torque sensor and the limit switch ensures that the controller can promptly stop the drive motor, effectively avoiding miscontrol and malfunction, improving the control reliability of the drive control components, and ensuring that the seat plate position is self-locked in time when it is unfolded or folded. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the tidal seat of the rail vehicle in a specific implementation method when the seat plate is unfolded downwards into place.

[0017] Figure 2This is a schematic diagram of a tidal seat on a rail vehicle with the seat panel folded upwards into place.

[0018] Figure 3 This is a schematic diagram of the seat plate assembly when the seat plate is unfolded downwards into place.

[0019] Figure 4 This is a schematic diagram of the seat plate assembly when the seat plate is folded upwards into place.

[0020] Figure 5 A schematic diagram of the drive control components mounted on the seat frame. Detailed Implementation

[0021] The following is combined with Figures 1-5 The embodiments of the present invention will be described in detail.

[0022] A tidal seat for a rail vehicle includes a drive control assembly 2 mounted on a seat frame 1 and controlled by a rail vehicle control system, and a seat plate assembly 3 hinged to the seat frame 1 and driven by the drive control assembly 2. The seat plate assembly 3 moves with the drive control assembly 2. The drive control assembly 2 includes a drive motor 4, a controller 5 that controls the operation of the drive motor 4 and is connected to the power supply of the rail vehicle, a reducer 6 connected to the drive motor 4, and a lead screw and nut assembly 7 connected to the output end of the reducer 6. The controller 5 is connected to the rail vehicle control system for signal transmission. The seat plate assembly 3 includes a gear assembly 8 meshing with the lead screw and nut assembly 7 and a seat plate 9 fixed to the gear assembly 8. The gear assembly 8 is hinged to the seat frame 7 and drives the seat plate 9 to unfold downwards or fold upwards as the lead screw and nut assembly 7 moves.

[0023] In the tidal seating system of the rail vehicle described above, the vehicle control system controls the drive motor 4 via controller 5. The torque output by drive motor 4 is reduced by reducer 6 and then transmitted to lead screw and nut assembly 7. Through the meshing of lead screw and nut assembly 7 with gear assembly 8, gear assembly 8 is driven to run, thereby causing seat plate 9 to unfold downwards or fold upwards. Lead screw and nut assembly 7 has a stable and reliable self-locking function. After drive motor 4 stops running, the self-locking of lead screw and nut assembly 7 achieves self-locking of seat plate 9, so that seat plate 9 automatically locks itself after being folded or unfolded into place, eliminating the need for additional locking devices, simplifying the internal structure of seat 9. The drive control component 2 is small in size, has a low space occupancy rate, and is easy to install on seat frame 1; the lead screw and nut in lead screw and nut assembly 7 cooperate to operate. The torque is converted into a linear torque by the nut running on the lead screw. The meshing of the lead screw and nut assembly 7 with the gear assembly 8 converts the linear torque into a torque that can drive the seat plate 9 to move. This forms two torque conversions. Utilizing the large transmission ratio of the combined transmission of the lead screw and nut assembly 7 and the gear assembly 8, a relatively large torque is output from a small-power motor. This reduces the power output from the reducer 6 and increases the torque to meet the torque requirements of the seat movement. This reduces the output power of the drive motor 4 and the operating current of the drive motor 4, thereby reducing the heat generated by the drive motor 4 during operation. This improves the safety of the drive control assembly 5 and effectively reduces seat damage caused by the overheating of the drive motor, improving the reliability and safety of the automatic seat folding.

[0024] The output end of the reducer 6 is connected to the lead screw and nut assembly 7 via a torque sensor 10. The torque sensor 10 is connected to the controller 5 for signal transmission. The lead screw and nut assembly 7 includes a lead screw 71 coaxially connected to the output end of the torque sensor 10 and a transmission nut 72 mounted on the lead screw 71. The transmission nut 72 meshes with the gear assembly 8 and drives the gear assembly 8 to rotate as the lead screw 71 runs. The torque output by the drive motor is reduced by the reducer 6 and then transmitted to the torque sensor 10. The torque sensor 10 monitors the output torque of the reducer 6 in real time and sends the monitoring signal to the controller 5. The output end of the torque sensor 10 is coaxially connected to the lead screw 71, which drives the lead screw 71 to rotate synchronously. The transmission nut 72 moves along the lead screw 71 as it rotates, and drives the gear assembly 8 to move. The coordinated movement of the lead screw 71 and the transmission nut 72 converts the torque into a linear torque of the transmission nut 72 moving along the lead screw 71. Compared with the rotational speed of the lead screw 71, the linear running speed of the transmission nut 72 is lower, which reduces the power output from the reducer 6. At the same time, the linear torque of the transmission nut 6 acts on the gear assembly 8, which has a larger torque and can drive the gear assembly 8 to move. Through the coordination of the lead screw 71 and the transmission nut 6, the output power required by the drive motor 4 is reduced, so that the low-power drive motor 4 can meet the folding requirements of the seat plate 9.

[0025] The transmission nut 72 is rectangular in shape and has a guide keyway 73 parallel to the lead screw 71. A guide key 74, which guides and engages with the guide keyway 73, is fixed on the seat frame 1. The upper end of the lead screw 71 is connected to the torque sensor 10, and the lower end is pressed into the bearing 11 on the seat frame 1. The engagement of the guide key 74 and the guide keyway 73 guides the movement of the transmission nut 72, ensuring the reliability of the transmission. The connection between the upper end of the lead screw 71 and the torque sensor 10, and the lower end being pressed into the bearing 11, ensures the smooth rotation of the lead screw 71. Simultaneously, the guide key 74 extending into the guide keyway 73 and the constraints imposed on the upper and lower ends of the lead screw 71 by the torque sensor 10 and the bearing 11 respectively reduce the vibration of the lead screw 71 and the transmission nut 72 during transmission, ensuring transmission stability and thus improving transmission reliability.

[0026] The transmission nut 72 has a rack surface 75 opposite to the gear assembly 8. The gear assembly 8 includes a gear 81 that meshes with the rack surface 75 and a rotating shaft 82 that is coaxially fixed with the gear 81. The rotating shaft 82 is hinged to the seat frame 1, and the inner end of the seat plate 9 is fixed to the rotating shaft 82. The inner hole of the transmission nut 2 is a threaded hole that mates with the lead screw 71, and its appearance is cuboid. One side is the rack surface 75 that meshes with the gear 81. Transmission is achieved through the meshing of the transmission nut 72 and the gear 81. The transmission nut 72 drives the gear 81 to rotate, and the rotating shaft 82 rotates synchronously with the gear 81 on the seat frame 1, causing the seat plate 9 to rotate, forming a downward unfolding or upward folding motion. As can be seen from the attached drawings, the transmission nut 72 is clamped between the guide key 74 and the gear 81. The left and right sides of the transmission nut 72 are constrained, which can effectively prevent the vibration of the transmission nut 72 and ensure the reliability of the meshing transmission between the transmission nut 72 and the gear 81. The lead screw 71 engages with the transmission nut 72 to convert torque into linear torque of the transmission nut 72. The transmission nut 72 meshes with the gear 81 to convert linear torque of the transmission nut 72 into torque of the gear 81. Through these two torque conversions, a large transmission ratio is achieved, increasing the torque of the gear 81 and reducing the output power required by the drive motor. That is, by utilizing the combination of the lead screw and nut assembly 7 and the gear assembly 8, which has the characteristic of a large transmission ratio, a small-power motor can output a relatively large torque to reduce the power output in the reducer 6 and increase the torque to meet the torque requirements of the seat movement. This reduces the output power of the drive motor 4, reduces the operating current of the drive motor 4, and thus reduces the heat generated by the drive motor 4 during operation.

[0027] The gear 81 is integrally formed from a semi-circular toothed disk 83 and a small semi-circular disk 84. The small semi-circular disk 84 is arranged opposite to the semi-circular toothed disk 83 and their centers coincide. The diameter of the small semi-circular disk 84 is smaller than the diameter of the semi-circular toothed disk 83. A gear limiting surface 85 is formed between the semi-circular toothed disk 83 and the small semi-circular disk 84. The circumference of the semi-circular toothed disk 83 has teeth that mesh with the rack surface 75. The seat frame 1 has a support rod 12 that supports the seat plate 9 when it is unfolded downwards. The support rod 12 is located below the seat plate 9. When the gear limiting surface 85 abuts against the support rod 12 as the gear 81 rotates, it limits the gear 81. As shown in the attached diagram, the outer periphery of the semi-circular gear disk 83 on gear 81 has teeth that mesh with the rack surface 75, while the outer periphery of the small semi-circular disk 84 has no tooth grooves. A radially arranged gear limiting surface 85 is formed between the semi-circular gear disk 83 and the small semi-circular disk 84. A support rod 12 is provided on the seat frame 1 below the seat plate 9. The support rod 12 supports the seat plate when it is unfolded downwards, that is, the support rod 12 limits the seat plate 9 when it is unfolded, preventing it from continuing to rotate downwards. When gear 81 drives seat plate 9 to fold upward, when gear 81 rotates to the point where gear limiting surface 85 abuts against the bottom of support rod 12, the rotation of gear 81 is limited and can no longer continue to rotate, so that seat plate 9 folds upward in place. Therefore, support rod 12 limits both the downward unfolding of seat plate 9 and the upward folding of seat plate 9. The contact between the bottom surface of seat plate 9 and support rod limits the downward unfolding of seat plate 9, and the abutment between gear limiting surface 85 and the bottom of support rod 12 limits the upward folding of seat plate 9.

[0028] The support rod 12 is equipped with a seat plate limit switch 121 that can contact the bottom surface of the seat plate 9 and a gear limit switch 122 that can contact the gear limit surface 85. The seat plate limit switch 121 and the gear limit switch 122 are respectively connected to the controller 5 for signal transmission. When the bottom surface of the seat plate contacts the support rod 12, the seat plate limit switch 121 is pressed and sends an unfolded signal to the controller 5. When the gear limit surface 85 abuts against the bottom surface of the support rod 12, the gear limit switch 122 is pressed and sends a folded signal to the controller 5. That is, when the seat plate 9 is unfolded, the seat plate limit switch 121 sends a signal to the controller, and when the seat plate 9 is folded, the gear limit switch 122 sends a signal to the controller.

[0029] During the movement of the seat plate 9, the torque sensor 10 transmits the real-time output torque to the controller 5. When the seat plate 9 unfolds downwards to its final position, it is supported on the support rod 12 and is limited. The real-time output torque of the torque sensor 9 increases rapidly, and the bottom surface of the seat plate 9 contacts the seat plate limit switch 121, sending an unfolding signal to the controller 5. The controller 5 detects the rapidly increasing real-time output torque signal from the torque sensor and the unfolding signal, and thus controls the drive motor 4 to stop running. When the seat plate 9 folds upwards to its final position, the gear limiting surface 85 abuts against the bottom surface of the support rod 12 and is limited. The real-time output torque of the force sensor 10 will rise rapidly, and the gear limit surface 85 will contact the gear limit switch 122 to send a folding signal to the controller 5. The controller 5 detects the signal of the rapid rise of the real-time output torque of the torque sensor 10 and the folding signal, and controls the drive motor 4 to stop running. The dual signal monitoring of the torque sensor and the limit switch can ensure that the controller can control the drive motor to stop running in time, effectively avoid miscontrol and misoperation, improve the control reliability of the drive control component 2, and ensure that the seat plate position is self-locked in time when the seat plate is unfolded or folded.

[0030] The drive motor 4 has a manual hexagonal shaft 41 coaxially connected to the motor shaft at its upper end. The lead screw and nut assembly 7 can move with the rotation of the manual hexagonal shaft 41. When the controller 5 is powered off, the seat plate 9 can be manually opened or folded by inserting a hand crank into the manual hexagonal shaft 41 to drive the motor shaft of the drive motor. This allows for manual folding and unfolding of the seat plate 9 in the power-off state, and the seat can also be adjusted in posture even when the power is off.

[0031] This system also includes a power converter that converts the DC110V power supply of the rail vehicle to a DC24V operating power supply. The controller 5 is connected to the DCV power supply of the rail vehicle through the power converter 13. The power converter has an isolating switch that controls the power supply to be turned on and off. The seat 9 is equipped with a signal indicator light 13 connected to the controller 5. The power converter converts the DC110V power supply of the rail vehicle to a DC24V operating voltage to power the drive control component 3, ensuring the stability of the power supply. The isolating switch on the power converter can be manually turned to the electrical isolation state using a key, so that the corresponding seat will not unfold or fold. The folding control of a seat in a certain position can be selected.

[0032] This invention also protects the control method for the tidal seat of the rail vehicle described above, characterized in that: under normal power-on conditions, the rail vehicle control system sends an unfolding or folding signal to the controller 5, and the controller 5 controls the drive motor 4 to run, thereby causing the seat plate 9 to unfold downwards or fold upwards. The controller 5 monitors the operating current of the drive motor 4 in real time. When the operating current of the drive motor 4 suddenly increases, the controller 5 first controls the drive motor 4 to stop running, and then controls the drive motor 4 to rotate in the opposite direction to drive the seat plate 9 back to its original position. Under power-off conditions, the drive motor 4 can be manually rotated to drive the seat plate 9 to unfold downwards or fold upwards. In the above-described control method, under normal power-on conditions, the rail vehicle control system controls the movement of the seat plate 9 through the controller 5. In the absence of obstacles, the seat plate 9 can automatically unfold and fold, and form a self-locking mechanism after reaching its position. When the seat plate 9 encounters an obstacle during movement, it can stop moving in time and retract to its original position, forming anti-pinch protection and improving the safety of the seat plate movement. Under power-off conditions, the drive motor 4 can be manually rotated to manually fold or unfold the seat plate 9, and the seat can also be adjusted in posture under power-off conditions.

[0033] Specifically, when the seat plate limit switch 121 contacts the seat plate 9 or the gear limit switch 122 contacts the gear limit surface 85, the output torque of the torque sensor 10 is the set torque. When the seat plate is unfolded downwards, the output torque of the torque sensor 10 quickly rises to the set torque, and the seat plate limit switch 121 contacts the bottom surface of the seat plate 9 and sends an unfolding signal to the controller 5. The controller 5 controls the drive motor 4 to stop running based on the detected set torque signal and unfolding signal, thus completing the downward unfolding action of the seat plate 9. When the seat plate 9 is folded upwards, the output torque of the torque sensor 10 quickly rises to the set torque, and the gear limit switch 122 contacts the gear limit surface 85 and sends a folding signal to the controller 5. The controller 5 controls the drive motor 4 to stop running based on the detected set torque signal and folding signal, thus completing the upward folding action of the seat plate. The dual signal monitoring of torque sensor 10 and limit switch can ensure that the controller can stop the drive motor 4 in time, effectively avoid miscontrol and misoperation, improve the control reliability of drive control component 2, and ensure that the seat plate position is self-locked in time when the seat plate is unfolded or folded into place.

[0034] The technical solutions of the embodiments of the present invention have been fully described above with reference to the accompanying drawings. It should be noted that the described embodiments are only a part of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

Claims

1. A tidal seat for a rail vehicle, comprising a drive control assembly mounted on a seat frame and controlled by a rail vehicle control system, and a seat plate assembly hinged to the seat frame and driven by the drive control assembly, the seat plate assembly moving with the drive control assembly, characterized in that: The drive control assembly includes a drive motor, a controller that controls the operation of the drive motor and is connected to the power supply of the rail vehicle, a reducer connected to the drive motor and a lead screw and nut assembly connected to the output end of the reducer. The controller is connected to the rail vehicle control system for signal transmission. The seat assembly includes a gear assembly that meshes with the lead screw and nut assembly and a seat plate that is fixed to the gear assembly. The gear assembly is hinged to the seat frame and drives the seat plate to unfold downward or fold upward as the lead screw and nut assembly moves. The output end of the reducer is connected to the lead screw and nut assembly via a torque sensor. The torque sensor is connected to the controller for signal transmission. The lead screw and nut assembly includes a lead screw coaxially connected to the output end of the torque sensor and a transmission nut mounted on the lead screw. The transmission nut meshes with the gear assembly and drives the gear assembly to rotate as the lead screw moves. The transmission nut is rectangular in shape and has a guide keyway parallel to the lead screw. A guide key that guides and engages with the guide keyway is fixed on the seat frame. The upper end of the lead screw is connected to the torque sensor, and the lower end is pressed into the bearing on the seat frame. The transmission nut has a rack surface opposite to the gear assembly. The gear assembly includes a gear that meshes with the rack surface and a rotating shaft that is fixed coaxially with the gear. The rotating shaft is hinged to the seat frame, and the inner end of the seat plate is fixed to the rotating shaft. The gear is integrally formed from a semi-circular toothed disc and a small semi-circular disc. The small semi-circular disc is arranged opposite to the semi-circular toothed disc and their centers coincide. The diameter of the small semi-circular disc is smaller than the diameter of the semi-circular toothed disc. A gear limiting surface is formed between the semi-circular toothed disc and the small semi-circular disc. The circumference of the semi-circular toothed disc has teeth that mesh with the rack surface. The seat frame has a support rod that supports the seat plate when it is unfolded downwards. The support rod is located below the seat plate. When the gear limiting surface abuts against the support rod as the gear rotates, it limits the gear. The support rod is equipped with a seat plate limit switch that can contact the bottom surface of the seat plate and a gear limit switch that can contact the gear limit surface. The seat plate limit switch and the gear limit switch are respectively connected to the controller for signal transmission.

2. The tidal seat for a rail vehicle according to claim 1, characterized in that: The upper end of the drive motor has a manual hexagonal shaft coaxially connected to the motor shaft, and the lead screw nut assembly can move with the rotation of the manual hexagonal shaft.

3. The tidal seat for a rail vehicle according to claim 1, characterized in that: It also includes a power converter that can convert the DC110V power supply of the rail vehicle to a DC24V operating power supply. The controller is connected to the DC110V power supply of the rail vehicle through the power converter. The power converter has an isolation switch to control the power supply to and from the rail vehicle. Signal indicator lights connected to the controller are installed on the seat.

4. The control method for the tidal seat of a rail vehicle according to any one of claims 1 to 3, characterized in that: Under normal power-on conditions, the rail vehicle control system sends an unfolding or folding signal to the controller. The controller then controls the drive motor to run, causing the seat plate to unfold downwards or fold upwards. The controller monitors the operating current of the drive motor in real time. When the operating current of the drive motor suddenly increases, the controller first controls the drive motor to stop running, and then controls the drive motor to rotate in the opposite direction to drive the seat plate back to its original position. In the power-off state, the seat plate can be unfolded downwards or folded upwards by manually rotating the drive motor.

5. The control method for the tidal seat of a rail vehicle according to claim 4, characterized in that: The torque sensor outputs a set torque when the seat limit switch contacts the seat plate or when the gear limit switch contacts the gear limit surface. When the seat plate is fully extended downwards, the torque sensor outputs a set torque, and the seat limit switch contacts the bottom surface of the seat plate, sending an extension signal to the controller. Based on the detected set torque signal and extension signal, the controller stops the drive motor, completing the downward extension of the seat plate. When the seat plate is fully folded upwards, the torque sensor outputs a set torque, and the gear limit switch contacts the gear limit surface, sending a folding signal to the controller. Based on the detected set torque signal and folding signal, the controller stops the drive motor, completing the upward folding of the seat plate.

Images