Spring compression type buffer structure

Abstract

The spring compression type buffer structure comprises a rotating shaft and a compression spring buffer unit connected with the rotating shaft, a first belt wheel and a second belt wheel are arranged at the two ends of the rotating shaft respectively, a pull belt is wound in the first belt wheel and the second belt wheel, one end of the pull belt is connected with the emergency door, and when the emergency door is opened or closed, the compression spring buffer unit is connected with the first belt wheel. The rotating shaft can be driven to rotate through the first belt wheel and the second belt wheel, the compressed spring buffering unit can absorb torque generated when the rotating shaft rotates, and therefore the rotating speed of the rotating shaft is reduced, it can be guaranteed that the emergency door is stably put down, door body damage caused by too fast opening of the emergency door can be avoided, and passenger evacuation and follow-up maintenance work can be prevented from being affected; the emergency door can be stably put down, 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 evacuation door buffers. Specifically, this utility model relates to a spring compression type 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 issues, patent document CN216580500U discloses a buffer and retrieval mechanism and an emergency evacuation door for rail vehicles. This includes a buffer mechanism and a retrieval mechanism. The buffer mechanism is mounted on the vehicle frame and connected to the door leaf via a rope. The buffer mechanism and the retrieval mechanism are connected by a transmission connection. The buffer mechanism utilizes a hydraulic damper to limit the linear velocity of the threaded 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 consistent deployment speeds for different products. The retrieval mechanism is connected by a transmission connection to the upper buffer mechanism, and a ratchet is also provided on the rotating shaft to prevent reverse rotation during retrieval and avoid accidental door leaf falls. However, this does not solve the aforementioned problems. Utility Model Content

[0004] This utility model is designed to solve the aforementioned problems. Its purpose is to provide a spring-compression buffer structure that ensures the smooth lowering of a tilt-down evacuation door, 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 a spring compression buffer structure, which includes a rotating shaft and a compression spring buffer unit connected to the rotating shaft. The two ends of the rotating shaft are respectively provided with a first pulley and a second pulley, and a pull belt is wound inside the first pulley and the second pulley.

[0006] The spring compression buffer structure provided by this utility model may also have the following feature: an external thread is provided at one end of the rotating shaft near the compression spring buffer unit.

[0007] The spring compression buffer structure provided by this utility model may also have the following features: the spring buffer unit includes a nut seat, a first support plate, a second support plate, a connecting rod, and a spring. The nut seat is movably mounted on the rotating shaft. The first support plate abuts against the nut seat and is movably sleeved on the rotating shaft. The second support plate is sleeved on the rotating shaft. The two ends of the connecting rod are respectively connected to the first support plate and the second support plate. The spring is sleeved on the connecting rod.

[0008] The spring compression buffer structure provided by this utility model may also have the following feature: the spring buffer unit further includes a limiting plate, one side of which is connected to the second support plate.

[0009] The spring compression buffer structure provided by this utility model may also have the following feature: a first bearing seat and a second bearing seat are provided on the rotating shaft, and the first bearing seat and the second bearing seat are respectively provided at both ends of the rotating shaft.

[0010] The spring compression buffer structure provided by this utility model may also have the following feature: a retraction gear is provided on the rotating shaft.

[0011] The technical effects of this utility model are as follows: The spring compression buffer structure provided by this utility model includes a rotating shaft and a compression spring buffer unit connected to the rotating shaft. The two ends of the rotating shaft are respectively provided with a first pulley and a second pulley. A pull belt is wound inside the first pulley and the second pulley. One end of the pull belt is connected to the evacuation door. When the evacuation door is opened or closed, the rotating shaft can be driven to rotate through the first pulley and the second pulley. The compression spring buffer unit can absorb the torque when the rotating shaft rotates, thereby reducing the rotation speed of the rotating shaft. This ensures that the evacuation door is lowered smoothly, avoids damage to the door body caused by the evacuation door opening too fast, and avoids affecting the evacuation of passengers and subsequent maintenance work.

[0012] Therefore, the spring compression buffer structure provided by this utility model can ensure that the evacuation door is lowered 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

[0013] This manual includes the following figures, which illustrate the following:

[0014] Figure 1 This is a schematic diagram of the spring compression buffer structure in an embodiment of this utility model.

[0015] The components are marked as follows: shaft-10, first pulley-11, second pulley-12, belt-13, first bearing seat-14, second bearing seat-15, recovery gear-16, compression spring buffer unit-20, nut seat-21, first support plate-22, second support plate-23, connecting rod-24, and compression spring-25. Detailed Implementation

[0016] 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.

[0017] Figure 1 This is a schematic diagram of the spring compression buffer structure in an embodiment of this utility model.

[0018] like Figure 1 As shown, the spring compression buffer structure provided by this utility model includes a rotating shaft 10 and a spring buffer unit 20 connected to the rotating shaft 10. The two ends of the rotating shaft 10 are respectively provided with a first pulley 11 and a second pulley 12. A pull belt 13 is wound inside the first pulley 11 and the second pulley 12. One end of the pull belt 13 is connected to the evacuation door. When the evacuation door is opened or closed, the rotating shaft 10 can be driven to rotate through the first pulley 11 and the second pulley 12. The spring buffer unit can absorb the torque when the rotating shaft 10 rotates, thereby reducing the rotation speed of the rotating shaft 10, ensuring that the evacuation door is lowered smoothly, avoiding damage to the door body caused by opening the evacuation door too quickly, and avoiding affecting the evacuation of passengers and subsequent maintenance work.

[0019] The rotating shaft 10 has an external thread at one end near the compression spring buffer unit 20. The compression spring buffer unit 20 includes a nut seat 21, a first support plate 22, a second support plate 23, a connecting rod 24, and a compression spring 25. The nut seat 21 is rotatably mounted on the rotating shaft 10 via a threaded engagement. When the rotating shaft 10 rotates, it can drive the nut seat 21 to move along the length direction of the rotating shaft 10. The first support plate 22 is movably sleeved on the rotating shaft 10, and the first support plate 22 abuts against the nut seat 21, so that the nut seat 21 can drive the first support plate 22 to move along the length direction of the rotating shaft 10. The second support plate 23... The disc 23 is rotatably mounted on the rotating shaft 10 to avoid affecting the normal rotation of the rotating shaft 10. The two ends of the connecting rod 24 are respectively connected to the first support disc 22 and the second support disc 23. One end of the connecting rod 24 is connected to the second support disc 23, and the other end of the connecting rod 24 is telescopically mounted on the first support disc 22. A nut is provided at the end of the connecting rod 24 near the first support disc 22. The nut can prevent the connecting rod 24 from slipping off the first support disc 22, thus improving the reliability of the structure. Multiple connecting rods 24 are evenly arranged between the first support disc 22 and the second support disc 23, and a compression spring 25 is sleeved on the connecting rod 24.

[0020] When the rotating shaft 10 rotates, it can drive the nut seat 21 to move along the length of the rotating shaft 10. Part of the torque of the rotating shaft 10 is converted into a thrust generated by the nut seat 21 along the length of the rotating shaft 10 through the nut seat 21. This allows the nut seat 21 to drive the first support plate 22 to move along the length of the rotating shaft 10, thereby pushing the first support plate 22 to compress the compression spring 25. The compression spring 25 absorbs the thrust generated by the nut seat 21 along the length of the rotating shaft 10, thereby continuously converting the torque of the rotating shaft 10 into a thrust generated by the nut seat 21 along the length of the rotating shaft 10. This allows the compression spring buffer unit 20 to suppress the rotation of the rotating shaft 10, prevent the rotating shaft 10 from rotating too fast, ensure that the evacuation door is lowered smoothly, avoid damage to the door body caused by the evacuation door opening too fast, and avoid affecting the evacuation of passengers and subsequent maintenance work.

[0021] The compression spring buffer unit 20 also includes a limiting plate 26. One side of the limiting plate 26 is connected to the second support plate 23. The limiting plate 26 is connected to the vehicle body, thereby preventing the second support plate 23 from rotating. This ensures that the compression spring 25 can effectively absorb the thrust generated by the nut seat 21 along the length of the rotating shaft 10, thus improving the reliability of the structure.

[0022] The rotating shaft 10 is also provided with a first bearing seat 14 and a second bearing seat 15. The first bearing seat 14 and the second bearing seat 15 are respectively located at both ends of the rotating shaft 10, which enables the rotating shaft 10 to rotate smoothly.

[0023] The rotating shaft 10 is equipped with a recovery gear 16, which is connected to the drive structure and can drive the rotating shaft 10 to reverse, thereby facilitating the recovery of the evacuation door.

[0024] The role and effect of the embodiments

[0025] The spring compression buffer structure provided by this utility model includes a rotating shaft 10 and a compression spring buffer unit 20 connected to the rotating shaft 10. The two ends of the rotating shaft 10 are respectively provided with a first pulley 11 and a second pulley 12. A pull belt 13 is wound inside the first pulley 11 and the second pulley 12. One end of the pull belt 13 is connected to the evacuation door. When the evacuation door is opened or closed, the rotating shaft 10 can be driven to rotate through the first pulley 11 and the second pulley 12. The compression spring buffer unit can absorb the torque when the rotating shaft 10 rotates, thereby reducing the rotation speed of the rotating shaft 10, ensuring that the evacuation door is lowered smoothly, avoiding damage to the door body due to the evacuation door opening too fast, and avoiding affecting the evacuation of passengers and subsequent maintenance work.

[0026] When the rotating shaft 10 rotates, it can drive the nut seat 21 to move along the length of the rotating shaft 10. Part of the torque of the rotating shaft 10 is converted into a thrust generated by the nut seat 21 along the length of the rotating shaft 10 through the nut seat 21. This allows the nut seat 21 to drive the first support plate 22 to move along the length of the rotating shaft 10, thereby pushing the first support plate 22 to compress the compression spring 25. The compression spring 25 absorbs the thrust generated by the nut seat 21 along the length of the rotating shaft 10, thereby continuously converting the torque of the rotating shaft 10 into a thrust generated by the nut seat 21 along the length of the rotating shaft 10. This allows the compression spring buffer unit 20 to suppress the rotation of the rotating shaft 10, prevent the rotating shaft 10 from rotating too fast, ensure that the evacuation door is lowered smoothly, avoid damage to the door body caused by the evacuation door opening too fast, and avoid affecting the evacuation of passengers and subsequent maintenance work.

[0027] 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 spring-compression type buffer structure, characterized in that, It includes a rotating shaft (10) and a compression spring buffer unit (20) connected to the rotating shaft (10). The two ends of the rotating shaft (10) are respectively provided with a first pulley (11) and a second pulley (12). A pull belt (13) is wound inside the first pulley (11) and the second pulley (12).

2. The spring compression buffer structure according to claim 1, characterized in that, The shaft (10) has an external thread at one end near the spring buffer unit (20).

3. The spring compression buffer structure according to claim 2, characterized in that, The compression spring buffer unit (20) includes a nut seat (21), a first support plate (22), a second support plate (23), a connecting rod (24), and a compression spring (25). The nut seat (21) is movably mounted on the rotating shaft (10). The first support plate (22) abuts against the nut seat (21) and is movably sleeved on the rotating shaft (10). The second support plate (23) is sleeved on the rotating shaft (10). The two ends of the connecting rod (24) are connected to the first support plate (22) and the second support plate (23) respectively. The compression spring (25) is sleeved on the connecting rod (24).

4. The spring compression buffer structure according to claim 3, characterized in that, The compression spring buffer unit (20) also includes a limiting plate (26), one side of which is connected to the second support plate (23).

5. The spring compression buffer structure according to claim 4, characterized in that, The rotating shaft (10) is also provided with a first bearing seat (14) and a second bearing seat (15), which are respectively located at both ends of the rotating shaft (10).

6. The spring compression buffer structure according to claim 1, characterized in that, The rotating shaft (10) is equipped with a recovery gear (16).

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