Retracting and releasing buffering structure of emergency door

Abstract

The emergency door retracting and releasing buffering structure comprises a rotating shaft and a buffering unit connected with the rotating shaft, a rotating wheel is arranged at the end of the rotating shaft and connected with a steel wire rope or a drawstring of a downward turning type emergency door, and when the downward turning type emergency door is opened or closed, the rotating wheel is driven by the steel wire rope or the drawstring to rotate, and the rotating shaft is driven to rotate. The buffer unit can provide a buffer effect and reduce the rotating speed of the rotating shaft and the rotating wheel, so that the downward-turning emergency door is ensured to be stably folded and unfolded, the problem that the door body is damaged due to the fact that the emergency door is opened too fast is avoided, and passenger evacuation and subsequent maintenance work are prevented from being affected; according to the emergency door retracting and releasing buffering structure, stable retracting and releasing of the downward-turning type emergency door can be guaranteed, the situation that the door body is damaged due to the fact that the emergency door is opened too fast can be avoided, and passenger evacuation and follow-up maintenance work can be prevented from being affected.

Description

Technical Field

[0001] This utility model belongs to the field of subway vehicle evacuation door structures. Specifically, this utility model relates to an evacuation door retraction and buffer structure. Background Technology

[0002] As a crucial component of urban public transportation, the safety and passenger evacuation efficiency of subway vehicles are key considerations in their design and manufacturing. Emergency evacuation doors, serving as lifelines for rapid passenger evacuation in emergency situations, directly impact passenger safety with their reliability. In recent years, the rationale behind the downward-opening evacuation door structure has led to its widespread adoption in Dali. Previously, the buffer and retraction mechanisms of downward-opening evacuation doors often relied on compression springs or gas springs to generate buffering force. This not only resulted in complex structures but also unstable operation, easily causing the evacuation doors to open too quickly. Excessive opening could damage the door, hindering passenger evacuation in emergencies and subsequent maintenance.

[0003] To address the aforementioned problems, patent document 216580500U discloses a buffer and retraction mechanism and an emergency evacuation door for rail vehicles, including a buffer mechanism and a retraction mechanism. The buffer mechanism is mounted on the vehicle frame and connected to the door leaf via a rope, and the buffer mechanism is drive-connected to the retraction mechanism. The buffer mechanism uses a hydraulic damper to limit the linear velocity of the screw sleeve movement to achieve a buffering effect. The damping force can be increased or decreased to accommodate weight fluctuations in the door leaf caused by manufacturing tolerances, ensuring that the unfolding speed of different products tends to be consistent. The retraction mechanism is drive-connected to the upper buffer mechanism, and a ratchet is also provided on the rotating shaft to prevent reverse rotation during retraction and avoid accidental door leaf falling, but it cannot solve the aforementioned problems. Utility Model Content

[0004] This utility model is designed to solve the aforementioned problems. Its purpose is to provide a buffer structure for the opening and closing of a tilt-down evacuation door that ensures smooth operation, prevents damage to the door due to excessively rapid opening, and avoids hindering passenger evacuation and subsequent maintenance. To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] This utility model provides an evacuation door retraction and buffer structure, which includes a rotating shaft and a buffer unit connected to the rotating shaft, with a rotating wheel at the end of the rotating shaft.

[0006] The evacuation door retraction and buffer structure provided by this utility model may also have the following feature: a bearing seat is provided at the end of the rotating shaft.

[0007] The evacuation door retraction buffer structure provided by this utility model may also have the following features: the buffer unit includes a helical gear reducer and a friction buffer assembly connected to the helical gear reducer, and the input shaft of the helical gear reducer is connected to the rotating shaft.

[0008] The evacuation door retraction buffer structure provided by this utility model may also have the following features: the friction buffer assembly includes a housing, a rotating seat, and a friction block; the housing is connected to a helical gear reducer; the rotating seat is connected to the output shaft of the helical gear reducer; and the friction block is movably mounted on the rotating seat.

[0009] The evacuation door retraction buffer structure provided by this utility model may also have the following feature: a connecting sleeve is provided on the rotating seat, and the connecting sleeve is connected to the output shaft of the helical gear reducer.

[0010] The evacuation door retraction buffer structure provided by this utility model may also have the following feature: a sliding groove is provided on the rotating seat, and a friction block is movably disposed in the sliding groove.

[0011] The evacuation door retraction buffer structure provided by this utility model may also have the following feature: the friction block includes a slider and a friction plate, with the friction plate located on the side of the slider near the housing.

[0012] The evacuation door retraction buffer structure provided by this utility model may also have the following feature: the friction buffer assembly further includes a base plate, which is connected to the housing.

[0013] The technical advantages of this utility model are as follows: The evacuation door retraction and buffer structure provided by this utility model includes a rotating shaft and a buffer unit connected to the rotating shaft. The end of the rotating shaft is provided with a rotating wheel, which is connected to the steel wire rope or pull strap of the downward-opening evacuation door. When the downward-opening evacuation door is opened or closed, the rotating wheel is driven to rotate through the steel wire rope or pull strap, which in turn drives the rotating shaft to rotate. The buffer unit can provide a buffering effect, slowing down the rotation speed of the rotating shaft and the rotating wheel, ensuring that the downward-opening evacuation door is retracted and opened smoothly, avoiding the problem of damage to the door body caused by the evacuation door opening too fast, and avoiding affecting the evacuation of passengers and subsequent maintenance work.

[0014] Therefore, the evacuation door retraction and buffer structure provided by this utility model can ensure that the downward-opening evacuation door can be retracted and opened smoothly, avoid damage to the door body caused by opening the evacuation door too quickly, and avoid affecting the evacuation of passengers and subsequent maintenance work. Attached Figure Description

[0015] This manual includes the following figures, which illustrate the following:

[0016] Figure 1 This is a schematic diagram of the evacuation door retraction and buffer structure in an embodiment of this utility model;

[0017] Figure 2 This is a schematic diagram of the rotating seat and friction block in an embodiment of this utility model.

[0018] The components are marked as follows: shaft-10, wheel-11, bearing seat-12, buffer unit-20, helical gear reducer-21, friction buffer assembly-22, housing-221, rotating seat-222, connecting sleeve-2221, slide groove-2222, friction block-223, slider-2231, friction plate-2232, and base plate-224. Detailed Implementation

[0019] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention, and to facilitate its implementation.

[0020] Figure 1 This is a schematic diagram of the evacuation door retraction and buffer structure in an embodiment of this utility model.

[0021] like Figure 1 As shown, the evacuation door retraction and buffer structure provided by this utility model includes a rotating shaft 10 and a buffer unit 20 connected to the rotating shaft 10. The end of the rotating shaft 10 is provided with a rotating wheel 11, and two rotating wheels 11 are respectively set at both ends of the rotating shaft 10. The rotating wheels 11 are connected to the steel wire rope or pull strap of the downward-opening evacuation door. When the downward-opening evacuation door is opened or closed, the rotating wheel 11 is driven to rotate through the steel wire rope or pull strap, which in turn drives the rotating shaft 10 to rotate. The buffer unit 20 can provide a buffering effect, slow down the rotation speed of the rotating shaft 10 and the rotating wheel 11, ensure that the downward-opening evacuation door is retracted and opened smoothly, avoid the problem of damage to the door body caused by the evacuation door opening too fast, and avoid affecting the evacuation of passengers and subsequent maintenance work.

[0022] The end of the rotating shaft 10 is also provided with a bearing seat 12. The two bearing seats 12 are respectively set at both ends of the rotating shaft 10. The bearing seats 12 are set on the vehicle body, which can ensure the smooth rotation of the rotating shaft 10 and the rotating wheel 11 and improve the reliability of the structure.

[0023] The buffer unit 20 includes a helical gear reducer 21 and a friction buffer assembly 22 connected to the helical gear reducer 21. The input shaft of the helical gear reducer 21 is connected to the rotating shaft 10. The friction buffer assembly 22 includes a housing 221, a rotating seat 222, and a friction block 223. The housing 221 is connected to the helical gear reducer 21, and the rotating seat 222 is connected to the output shaft of the helical gear reducer 21, so that the rotating shaft 10 can drive the rotating seat 222 to rotate through the helical gear reducer 21. The rotating seat 222 is rotatably disposed in the housing 221, and the friction block 223 is movably disposed on the rotating seat 222.

[0024] Figure 2 This is a schematic diagram of the rotating seat and friction block in an embodiment of this utility model.

[0025] like Figure 2 As shown, a connecting sleeve 2221 is provided on the rotating base 222, and the connecting sleeve 2221 is connected to the output shaft of the helical gear reducer 21. The rotating base 222 is provided with sliding grooves 2222, with two sliding grooves 2222 respectively located on both sides of the rotating base 222. Friction blocks 223 are slidably disposed within the sliding grooves 2222, with two friction blocks respectively disposed within the two sliding grooves 2222, thereby improving the buffering effect. Each friction block 223 includes a slider 2231 and a friction plate 2232. Located on the side of the slider 2231 near the housing 221, when the rotating shaft 10 drives the rotating seat 222 to rotate through the helical gear reducer 21, the friction block 223, under centrifugal force, causes the friction plate 2232 to abut against the inner wall of the housing 221, providing a buffering effect and acting as a brake, slowing down the rotation speed of the rotating shaft 10 and the rotating wheel 11, ensuring that the downward-opening evacuation door can be opened and closed smoothly, avoiding the problem of the evacuation door opening too fast and causing damage to the door body, and avoiding affecting the evacuation of passengers and subsequent maintenance work.

[0026] The friction buffer assembly 22 also includes a base plate 224, which is connected to the housing 221 and is used to seal the rotating seat 222 inside the housing 221, thereby improving the sealing performance.

[0027] The role and effect of the embodiments

[0028] The evacuation door retraction and buffering structure provided by this utility model includes a rotating shaft 10 and a buffering unit 20 connected to the rotating shaft 10. A rotating wheel 11 is provided at the end of the rotating shaft 10, with two rotating wheels 11 respectively located at both ends of the rotating shaft 10. The rotating wheels 11 are connected to the steel wire rope or pull strap of the downward-opening evacuation door. When the downward-opening evacuation door opens or closes, the steel wire rope or pull strap drives the rotating wheel 11 to rotate, which in turn drives the rotating shaft 10 to rotate. The buffering unit 20 provides a buffering effect, slowing down the rotation speed of the rotating shaft 10 and the rotating wheel 11, ensuring the smooth retraction and opening of the downward-opening evacuation door. This avoids damage to the door body caused by opening the evacuation door too quickly, and prevents disruption to passenger evacuation and subsequent maintenance work. The evacuation door retraction and buffering structure provided by this utility model ensures the smooth retraction and opening of the downward-opening evacuation door, prevents damage to the door body caused by opening the evacuation door too quickly, and prevents disruption to passenger evacuation and subsequent maintenance work.

[0029] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A buffer structure for the opening and closing of an evacuation door, characterized in that, The device includes a rotating shaft (10) and a buffer unit (20) connected to the rotating shaft (10). The rotating shaft (10) has a rotating wheel (11) at its end. The buffer unit (20) includes a helical gear reducer (21) and a friction buffer assembly (22) connected to the helical gear reducer (21). The input shaft of the helical gear reducer (21) is connected to the rotating shaft (10). The friction buffer assembly (22) includes a housing (221), a rotating seat (222), and a friction block (223). The housing (221) is connected to the rotating shaft (10). The helical gear reducer (21) is connected, the rotating seat (222) is connected to the output shaft of the helical gear reducer (21), the friction block (223) is movably disposed on the rotating seat (222), the rotating seat (222) is provided with a connecting sleeve (2221), the connecting sleeve (2221) is connected to the output shaft of the helical gear reducer (21), the rotating seat (222) is provided with a sliding groove (2222), and the friction block (223) is movably disposed in the sliding groove (2222).

2. The evacuation door retraction buffer structure according to claim 1, characterized in that, The end of the shaft (10) is also provided with a bearing seat (12).

3. The evacuation door retraction and buffer structure according to claim 2, characterized in that, The friction block (223) includes a slider (2231) and a friction plate (2232), the friction plate (2232) being located on the slider (2231) on the side close to the housing (221).

4. The evacuation door retraction buffer structure according to claim 3, characterized in that, The friction buffer assembly (22) also includes a base plate (224), which is connected to the housing (221).

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