Evacuation ladder tray locking mechanism of a rail vehicle side door evacuation device

Abstract

The utility model discloses a kind of evacuation ladder tray locking mechanisms of rail vehicle side door evacuation device, solve the problems of instability, complex operation, slip jam and no automatic reset of existing mechanism locking;Including framework assembly, evacuation ladder assembly and sliding tray assembly;Sliding tray assembly is equipped with guide pulley and locking pin bolt, and evacuation ladder assembly is fixedly connected thereon;Framework assembly is equipped with front end, rear end positioning lock, and is opened and closed by swing lever pull lock tongue, swing lever is connected with buckle hand by transmission steel wire rope, hinged pin shaft sleeve torsion reset spring, and is also equipped with tensioning bracket limit steel wire rope deviation.Locking pin bolt and rear end positioning lock interference fit when recovery station, and interference fit with front end positioning lock when pulling out station.The mechanism locking is stable, convenient to operate, slip smoothly, and guarantee rail vehicle emergency evacuation safety and efficiency.

Description

Technical Field

[0001] This technology relates to an evacuation ladder tray locking mechanism for a side door evacuation device of a rail vehicle, specifically belonging to the field of rail vehicle safety equipment technology. Background Technology

[0002] With the rapid development of the rail transit industry, the safe operation of rail vehicles has received widespread attention. Among these, the reliability and convenience of emergency evacuation systems are particularly important as key equipment for ensuring passenger safety. Currently, the main evacuation methods for rail vehicles include end evacuation and side door evacuation. End evacuation suffers from long escape routes and low evacuation efficiency, while side door evacuation has become the mainstream choice due to its shorter distance and direct operation.

[0003] During rail vehicle operation, in emergency situations requiring passenger evacuation, the evacuation ladders in the side door evacuation devices are critical equipment. They need to extend quickly and stably from inside the vehicle to the ground for passenger evacuation. Currently, most rail vehicle side door evacuation ladders are supported by tray assemblies that slide along rails to achieve extension and retraction. However, existing tray locking mechanisms have several drawbacks: First, the locking structure has poor stability; during vehicle movement or when the evacuation ladder is pulled out / retracted, tray displacement deviation can easily occur, affecting the normal use of the evacuation ladder. Second, the unlocking operation is complex and has low transmission efficiency, making it difficult to quickly extend or retract the evacuation ladder in emergencies. Third, there is a lack of automatic reset function; after unlocking, the lock body must be manually reset, increasing the operation steps and delaying evacuation. Fourth, the guide mechanism is poorly designed, and the tray is prone to jamming and deviation during sliding, reducing evacuation efficiency. These problems all lead to safety hazards during emergency evacuations and fail to meet the safety evacuation requirements of rail vehicles. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide an evacuation ladder tray locking mechanism for a side door evacuation device of a rail vehicle. The mechanism has a reasonable structural design, reliable locking, and convenient operation, and can effectively ensure the safety and efficiency of the emergency evacuation process of rail vehicles.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A locking mechanism for an evacuation ladder tray in a side door evacuation device for rail vehicles includes a frame assembly, an evacuation ladder assembly, and a sliding tray assembly. The sliding tray assembly is equipped with guide pulleys and locking pins, and the guide pulleys are adapted to the guide rails of the frame assembly. The evacuation ladder assembly is fixed to the sliding tray assembly by bolts and moves reciprocally linearly along the guide rails with the tray assembly. The frame assembly also includes a front positioning lock and a rear positioning lock adapted to the locking pins of the sliding tray assembly. The front positioning lock and the rear positioning lock are opened and closed by a lever pulling the locking tongue, and the lever is pulled by a handrail via a transmission wire rope. When the sliding tray assembly is in the retraction position, the locking pin and the locking tongue of the rear positioning lock form an interference fit, restricting the axial displacement of the sliding tray assembly along the guide rails. When the sliding tray assembly is in the pull-out position, the locking pin and the locking tongue of the front positioning lock form an interference fit, restricting the axial displacement of the sliding tray assembly along the guide rails.

[0006] Furthermore, the rocker arm includes a mounting block and a pull rod. The two ends of the pull rod are respectively connected to the mounting block and the locking tongue. The mounting block is set on the frame assembly through a hinge pin and rotates around the hinge pin. Simultaneously pulling the pull rod triggers the locking tongue to retract and unlock.

[0007] Furthermore, the pull rod is hinged to the mounting block and the locking tongue via pins to ensure flexibility in the transmission process and reduce wear between components.

[0008] Furthermore, the guide pulleys are provided in at least two sets, symmetrically distributed at the two end corners of the sliding pallet assembly, to ensure the stability of the sliding pallet assembly during movement.

[0009] Furthermore, the guide pulley includes a vertical guide wheel and a lateral anti-deviation wheel. The vertical guide wheel is used to limit the vertical displacement of the sliding pallet assembly, and the lateral anti-deviation wheel is used to prevent it from shifting laterally, thereby further improving the motion accuracy.

[0010] Furthermore, the front-end positioning lock and the rear-end positioning lock also include a return spring and a guide sleeve, forming a spring-return lock body structure to ensure that the lock tongue can stably maintain the locked state when no external force is applied.

[0011] Furthermore, each of the hinge pins of the rocker arm is fitted with a torsion return spring. When the external force of the manual unlocking handle is removed, the torsion return spring drives the rocker arm to return to its initial position, causing the bolts of the front and rear positioning locks to automatically extend and reset, thereby realizing the automatic reset and locking of the lock body. The locking and reset can be completed without additional operation, improving the convenience of use.

[0012] Furthermore, there are at least two locking pins, which enhances locking stability through multi-point locking and avoids safety hazards caused by the failure of a single locking point.

[0013] Furthermore, the locking mechanism also includes a tensioning bracket for limiting the offset of the transmission wire rope. The tensioning bracket is fixedly mounted on the skeleton assembly to ensure the transmission accuracy of the transmission wire rope and prevent the unlocking operation from failing due to wire rope offset.

[0014] The specific working principle is as follows: The evacuation ladder tray locking mechanism of the rail vehicle side door evacuation device of this utility model has two working states in actual use: 1. Recycling Status: When the evacuation ladder is not in use, the sliding pallet assembly is in the recycling position. At this time, the locking pin on the sliding pallet assembly and the locking tongue of the rear positioning lock on the frame assembly form an interference fit and lock. Through the locking action of the rear positioning lock, the axial displacement of the sliding pallet assembly along the guide rail is restricted, ensuring that the evacuation ladder is stably stored inside the side door of the rail vehicle, and preventing the pallet assembly from accidentally sliding due to vibration and other factors during vehicle operation.

[0015] 2. Deployed State: In case of emergency requiring evacuation, staff or passengers pull the handle. The handle, via a transmission steel cable, drives the swing arm to rotate around the hinge pin. Simultaneously, the swing arm pulls the lever, triggering the retraction of the front and rear positioning locks. At this time, the sliding tray assembly can be pushed outward along the guide rail. When the sliding tray assembly reaches the pull-out position, the locking pin aligns with the locking tongue of the front positioning lock, releasing the pull on the handle. The torsion return spring drives the swing arm back to its initial position, and the locking tongue of the front positioning lock extends under the action of the return spring, forming an interference fit with the locking pin, restricting the axial displacement of the sliding tray assembly and keeping the evacuation ladder stably in the deployed position for easy passenger evacuation. After evacuation, pull the handle again to unlock and push the sliding tray assembly back to the recycling position. The rear positioning lock automatically locks, completing the storage process.

[0016] The beneficial effects are as follows:

[0017] 1. Reliable locking and high safety performance: The interference fit locking method, combined with the multi-point locking design, can effectively limit the displacement of the sliding tray assembly and prevent accidental sliding; at the same time, the spring return lock body structure and the torsion return spring ensure the stability of the locking state and greatly improve the safety of emergency evacuation.

[0018] 2. Easy to operate and quick to respond: The linkage design of the handle, transmission wire rope and swing arm enables quick unlocking. The operation is simple and easy to understand. Even in an emergency, the evacuation ladder can be quickly deployed. The lock body can automatically reset and lock without additional operation, further improving the ease of use.

[0019] 3. Stable structure and long service life: The vertical and lateral dual guiding design of the guide pulley, as well as the limiting effect of the tension bracket on the transmission wire rope, ensure the movement accuracy of each component and reduce wear; the hinged connection of each connection part improves the transmission flexibility and extends the service life of the overall mechanism.

[0020] 4. High adaptability and wide range of applications: The overall structure is compact and can be flexibly adjusted according to the side door structure of different types of rail vehicles. It is highly adaptable and can be widely used in the side door evacuation system of various rail transit vehicles. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the evacuation ladder assembly, tray assembly, and frame assembly of the rail vehicle side door evacuation device in this embodiment. Figure 2 This is a schematic diagram of the skeleton component structure in this embodiment; Figure 3 This is a schematic diagram of the handle structure of the skeleton component in this embodiment; Figure 4 This is a schematic diagram of the front-end positioning lock structure of the skeleton component in this embodiment; Figure 5 This is a schematic diagram of the positioning lock structure at the rear end of the skeleton component in this embodiment; Figure 6 This is a schematic diagram of the sliding tray assembly structure in this embodiment; Figure 7 This is a schematic diagram of the guide pulley structure of the sliding tray assembly in this embodiment.

[0022] In the diagram: 1. Frame assembly; 2. Evacuation ladder assembly; 3. Sliding pallet assembly; 4. Guide pulley; 41. Vertical guide wheel; 42. Lateral anti-deviation wheel; 5. Locking pin; 6. Guide rail; 7. Front positioning lock; 8. Rear positioning lock; 9. Swing rod; 91. Mounting block; 92. Pull rod; 10. Lock tongue; 11. Transmission wire rope; 12. Handle; 13. Hinge pin; 14. Tensioning bracket. Detailed Implementation

[0023] The present invention will be further described below with reference to specific embodiments. Example

[0024] like Figures 1-7As shown, this embodiment provides an evacuation ladder tray locking mechanism for a side door evacuation device of a rail vehicle, including a frame assembly 1, an evacuation ladder assembly 2, and a sliding tray assembly 3.

[0025] The sliding pallet assembly 3 is equipped with guide pulleys 4 and locking pins 5. There are two sets of guide pulleys 4, which are symmetrically distributed at the two end corners of the sliding pallet assembly 1 to ensure the stability of the sliding pallet assembly 3 during movement. The guide pulleys 4 include vertical guide wheels 41 and lateral anti-deviation wheels 42. The vertical guide wheels 41 are used to limit the vertical displacement of the sliding pallet assembly 3, and the lateral anti-deviation wheels 42 are used to prevent it from shifting laterally, further improving the movement accuracy. The guide pulleys 4 are adapted to the guide rails 6 of the frame assembly 1. The evacuation ladder assembly 2 is fixed on the sliding pallet assembly 3 by bolts and moves back and forth linearly along the guide rails 4 with the pallet assembly 3.

[0026] In this embodiment, there are two locking pins 5. Multi-point locking further enhances the locking stability and avoids the safety hazards caused by the failure of a single locking point.

[0027] The skeleton assembly 1 also includes a front positioning lock 7 and a rear positioning lock 8 for adapting to the locking pin 5 of the sliding tray assembly 3. The front positioning lock 7 and the rear positioning lock 8 also include a return spring and a guide sleeve, which is a spring return lock body structure that can ensure that the lock tongue 10 can stably maintain the locked state when no external force is applied.

[0028] The front positioning lock 7 and the rear positioning lock 8 are opened and closed by pulling the lock tongue 10 through the swing rod 9. The swing rod 9 is pulled by the handrail 12 through the transmission steel wire rope 11. The swing rod 9 includes a mounting block 91 and a pull rod 92. Pulling the pull rod 92 at the same time triggers the lock tongue 10 to retract and unlock. The pull rod 92 is hinged to the mounting block 91 and the lock tongue 10 through pins to ensure the flexibility of the transmission process and reduce wear between parts. The mounting block 91 is set on the frame assembly 1 through the hinge pin 13 and rotates around the hinge pin 13.

[0029] Each hinge pin 13 of the rocker arm 9 is fitted with a torsion return spring. When the external force of the manual unlocking handle 12 is removed, the torsion return spring drives the rocker arm 9 to return to the initial position, so that the bolts 10 of the front positioning lock 7 and the rear positioning lock 8 automatically extend and reset, realizing the automatic reset and locking of the lock body. The locking and reset can be completed without additional operation, improving the convenience of use.

[0030] The locking mechanism in this embodiment also includes a tensioning bracket 14 for limiting the offset of the transmission wire rope 11. The tensioning bracket 14 is fixedly mounted on the skeleton assembly 1 to ensure the transmission accuracy of the transmission wire rope 11 and to prevent the unlocking operation from failing due to the offset of the wire rope.

[0031] In this embodiment, when the sliding pallet assembly 3 is in the recycling position, the locking pin 5 and the locking tongue 10 of the rear positioning lock 8 form an interference fit to lock the sliding pallet assembly 3 along the guide rail 4; when the sliding pallet assembly 3 is in the pull-out position, the locking pin 5 and the locking tongue 10 of the front positioning lock 7 form an interference fit to lock the sliding pallet assembly 3 along the guide rail 4.

[0032] In this embodiment, when the locking mechanism is in use and in the retracted state, the locking pin 5 and the locking tongue 10 of the rear positioning lock 8 are interference-fitted and locked to ensure the evacuation ladder is stably stored. When it needs to be unfolded, the handle 12 is pulled, which drives the swing arm 9 to rotate through the transmission wire rope 11. The pull rod 92 pulls the locking tongue 10 to retract and unlock, pushing the sliding tray assembly 3 to the pull-out position. The locking pin 5 and the locking tongue 10 of the front positioning lock 7 are locked, completing the unfolding and positioning. After the external force is removed, the torsion return spring drives the swing arm 9 to return to its original position, and the locking tongue 10 automatically extends and locks, ensuring safe use.

[0033] The evacuation ladder tray locking mechanism of the rail vehicle side door evacuation device in this embodiment has a reasonable structural design, reliable locking, and convenient operation. It can effectively meet the safety requirements of emergency evacuation of rail vehicles and has good practical value and promotion prospects.

[0034] Obviously, the above embodiments are merely examples to clearly illustrate the technical solution of this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A locking mechanism for the evacuation ladder tray of a side door evacuation device for a rail vehicle, characterized in that, Includes frame components, evacuation ladder components, and sliding pallet components; The sliding pallet assembly is equipped with guide pulleys and locking pins, and the guide pulleys are adapted to the guide rails of the frame assembly; The evacuation ladder assembly is fixedly mounted on the sliding pallet assembly by bolts and moves back and forth linearly along the guide rail with the sliding pallet assembly; The skeleton assembly also includes a front positioning lock and a rear positioning lock for adapting to the locking pin of the sliding tray assembly. The front positioning lock and the rear positioning lock are opened and closed by pulling the locking tongue with a swing rod. The swing rod is pulled by a lever via a transmission steel wire rope. When the sliding pallet assembly is retracted to the station, the locking pin and the locking tongue of the rear positioning lock form an interference fit to lock, restricting the axial displacement of the sliding pallet assembly along the guide rail; When the sliding pallet assembly is pulled out of the workstation, the locking pin and the locking tongue of the front positioning lock form an interference fit to lock, restricting the axial displacement of the sliding pallet assembly along the guide rail.

2. The evacuation ladder tray locking mechanism of the rail vehicle side door evacuation device according to claim 1, characterized in that, The rocker arm includes a mounting block and a pull rod. The two ends of the pull rod are connected to the mounting block and the locking tongue, respectively. The mounting block is set on the frame assembly through a hinge pin and rotates around the hinge pin. Pulling the pull rod at the same time triggers the locking tongue to retract and unlock.

3. The evacuation ladder tray locking mechanism of the rail vehicle side door evacuation device according to claim 2, characterized in that, The pull rod is hinged to the mounting block and the locking tongue by pins.

4. The evacuation ladder tray locking mechanism of the rail vehicle side door evacuation device according to claim 1, characterized in that, The guide pulleys are provided in at least two sets, symmetrically distributed at the two end corners of the sliding tray assembly.

5. The evacuation ladder tray locking mechanism of the rail vehicle side door evacuation device according to claim 1, characterized in that, The guide pulley includes a vertical guide pulley and a lateral anti-deviation pulley.

6. The evacuation ladder tray locking mechanism of the rail vehicle side door evacuation device according to claim 1, characterized in that, The front-end positioning lock and the rear-end positioning lock also include a return spring and a guide sleeve, forming a spring-return lock body structure.

7. The evacuation ladder tray locking mechanism of the rail vehicle side door evacuation device according to claim 1, characterized in that, Each of the hinge pins of the rocker arm is fitted with a torsion return spring. When the external force of the manual unlocking handle is removed, the torsion return spring drives the rocker arm to return to its initial position, so that the bolts of the front positioning lock and the rear positioning lock automatically extend and reset, thereby realizing the automatic reset and locking of the lock body.

8. The evacuation ladder tray locking mechanism of the rail vehicle side door evacuation device according to claim 1, characterized in that, There are at least two locking pins.

9. The evacuation ladder tray locking mechanism of the rail vehicle side door evacuation device according to claim 1, characterized in that, It also includes a tensioning bracket for limiting the offset of the transmission wire rope, the tensioning bracket being fixedly mounted on the skeleton assembly.

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