Evacuation door drawstring rotary recovery device

Abstract

The emergency door drawstring rotating recovery device comprises a shell, a rotating shaft and a drawstring, the rotating shaft is movably arranged on the shell, the drawstring is wound on the rotating shaft, a rotating recovery assembly is arranged in the shell and connected with the rotating shaft, and when an emergency door is closed, the rotating recovery assembly can drive the rotating shaft to rotate and drive the drawstring to be recovered. According to the rotary withdrawing device for the drawstring of the emergency door, the drawstring is withdrawn and wound on the rotating shaft, so that the withdrawing quality of the drawstring is improved, the drawstring can be normally pulled out when the emergency door is opened next time, the reliability of the structure is improved, and the manpower consumption when the emergency door is closed is reduced; the pull belt recovery quality can be guaranteed, and it can be guaranteed that the pull belt is normally pulled out when the emergency door is opened next time.

Description

Technical Field

[0001] This utility model belongs to the field of evacuation doors. Specifically, this utility model relates to an evacuation door pull strap rotation and recovery device. Background Technology

[0002] Emergency evacuation doors generally require manual operation for opening and closing. The retraction process also requires manually pulling back the strap to retract it before hanging it at a fixed point. However, the fixed point is located high up, and pulling back the strap is inconvenient, making it difficult to guarantee the quality of the strap retraction. This results in the strap not extending properly when the evacuation door is opened next time, affecting the normal opening and closing function of the emergency evacuation door.

[0003] To address the aforementioned problems, patent document CN112141146A discloses a vehicle emergency evacuation door ramp retraction mechanism, which includes a pull strap extending from within for retracting and extending the ramp. It comprises a mounting base with two side walls on a ramp post, with corresponding arc-shaped grooves on the side walls facing the ramp. A boss is provided near the end of the arc-shaped groove's inner edge close to the post. The mounting base contains a ratchet device for retracting and extending the pull strap, which includes a pawl assembly and a ratchet shaft penetrating the two side walls of the mounting base. The pull strap is wound around the ratchet shaft. A ratchet shaft is provided with a ratchet and a crank rocker arm that can rotate around the ratchet shaft. The crank rocker arm is provided with a rotating rod assembly that rotates the ratchet and a button component that controls the rotation of the rotating rod assembly. The button component is mounted to the crank rocker arm via a button shaft. The rotating rod assembly includes a ratchet rotating rod that passes through an arc-shaped groove in the mounting seat. Rotating the button component allows the ratchet rotating rod to pass around a boss within the arc-shaped groove. The crank section of the crank rocker arm can contact or disengage from the pawl assembly when it rotates to control the ratchet rotation to tighten or loosen the belt, but this cannot solve the above-mentioned problem. Utility Model Content

[0004] This utility model is designed to solve the aforementioned problems. Its purpose is to provide a rotary evacuation door pull strap recovery device that facilitates easy and high-quality recovery of the pull strap when the evacuation door is closed, ensuring the pull strap is pulled out normally when the evacuation door is opened again. To achieve this objective, the technical solution adopted by this utility model is as follows:

[0005] This utility model provides an evacuation door pull strap rotation and recovery device, which includes a housing, a rotating shaft and a pull strap. The rotating shaft is movably mounted on the housing, the pull strap is wound around the rotating shaft, and a rotation and recovery assembly is provided inside the housing and connected to the rotating shaft.

[0006] The evacuation door pull belt rotation and recovery device provided by this utility model may also have the following feature: a cover plate is provided on one side of the housing, and one end of the rotating shaft is movably connected to the cover plate.

[0007] The evacuation door pull belt rotation and recovery device provided by this utility model may also have the following feature: a stud is provided between the shell and the cover plate, and the two ends of the stud are respectively connected to the shell and the cover plate.

[0008] The evacuation door pull belt rotation and recovery device provided by this utility model may also have the following feature: a sleeve is fitted on the stud, and the sleeve is located between the shell and the cover plate.

[0009] The evacuation door pull belt rotation and recovery device provided by this utility model may also have the following feature: the rotation and recovery component includes a coil spring, which is disposed inside the housing. One end of the coil spring is connected to the rotating shaft, and the other end of the coil spring is connected to the housing.

[0010] The evacuation door pull belt rotation and recovery device provided by this utility model may also have the following feature: the rotating shaft includes a first shaft section and a second shaft section, the first shaft section is located between the housing and the cover plate, and the second shaft section is located inside the housing.

[0011] The evacuation door pull belt rotation and recovery device provided by this utility model may also have the following feature: both ends of the first section are provided with flanged graphite copper sleeves.

[0012] The evacuation door pull belt rotation and recovery device provided by this utility model may also have the following feature: a pull ring is provided at the end of the pull belt away from the rotating shaft.

[0013] The technical advantages of this utility model are as follows: The evacuation door pull strap rotation and recovery device provided by this utility model includes a housing, a rotating shaft, and a pull strap. The rotating shaft is movably mounted on the housing, and the pull strap is wound around the rotating shaft. A rotation recovery component is provided inside the housing and is connected to the rotating shaft. When the evacuation door is closed, the rotation recovery component can drive the rotating shaft to rotate, thereby driving the pull strap to retract and allowing the pull strap to be wound around the rotating shaft. This improves the quality of pull strap recovery, ensures that the pull strap can be pulled out normally when the evacuation door is opened next time, improves the reliability of the structure, and reduces the manpower consumption when closing the evacuation door.

[0014] Therefore, the evacuation door pull strap rotation and recovery device provided by this utility model can conveniently recover the pull strap when the evacuation door is closed, can ensure the quality of pull strap recovery, and can ensure that the pull strap is pulled out normally when the evacuation door is opened next time. Attached Figure Description

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

[0016] Figure 1 This is a schematic diagram of the structure of the evacuation door pull belt rotation and recovery device in an embodiment of this utility model;

[0017] Figure 2 This is a cross-sectional view of the evacuation door pull belt rotation and recovery device in an embodiment of this utility model;

[0018] Figure 3 This is a schematic diagram of the pull strap structure in an embodiment of this utility model;

[0019] Figure 4 This is a schematic diagram of the coil spring in an embodiment of this utility model.

[0020] The components in the diagram are labeled as follows: housing-10, cover plate-11, stud-12, sleeve-13, shaft-20, first shaft section-21, second shaft section-22, flanged graphite copper sleeve-23, pull strap-30, pull ring-31, rotating recovery assembly-40, and coil spring-41. Detailed Implementation

[0021] 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.

[0022] Figure 1 This is a schematic diagram of the structure of the evacuation door pull belt rotation and recovery device in an embodiment of this utility model; Figure 2 This is a cross-sectional view of the evacuation door pull belt rotation and recovery device in an embodiment of this utility model; Figure 3 This is a schematic diagram of the pull strap structure in an embodiment of this utility model.

[0023] like Figure 1 , Figure 2 as well as Figure 3 As shown, the evacuation door pull strap rotation and retraction device provided by this utility model includes a housing 10, a rotating shaft 20, and a pull strap 30. The housing 10 is in the shape of a cuboid shell. The rotating shaft 20 is movably mounted on the housing 10. One end of the pull strap 30 is connected to the rotating shaft 20 and is wound around the rotating shaft 20. A rotation and retraction assembly 40 is provided inside the housing 10 and is connected to the rotating shaft 20. When the evacuation door is closed, the rotation and retraction assembly 40 can drive the rotating shaft 20 to rotate, thereby driving the pull strap 30 to retract and retract it onto the rotating shaft 20. This improves the quality of pull strap 30 retrieval and ensures that the pull strap 30 can be pulled out normally when the evacuation door is opened next time. This improves the reliability of the structure and reduces the manpower consumption when closing the evacuation door.

[0024] A cover plate 11 is provided on one side of the housing 10. The rotating shaft 20 includes a first shaft section 21 and a second shaft section 22. The first shaft section 21 is located between the housing 10 and the cover plate 11, and the second shaft section 22 is located inside the housing 10. One end of the pull strap 30 is connected to the first shaft section 21. The two ends of the rotating shaft 20 are rotatably connected to the housing 10 and the cover plate 11 respectively, so that the rotating shaft 20 can rotate and drive the pull strap 30 to be wound around the first shaft section 21.

[0025] A stud 12 is provided between the housing 10 and the cover plate 11. The two ends of the stud 12 are connected to the housing 10 and the cover plate 11 respectively, thereby connecting the housing 10 and the cover plate 11. A sleeve 13 is fitted onto the stud 12, and the sleeve 13 is located between the housing 10 and the cover plate 11. Five studs 12 are provided between the housing 10 and the cover plate 11, which can improve the structural strength between the housing 10 and the cover plate 11. Three studs 12 are respectively located at the three corners of the housing 10, and the remaining two studs 12 are adjacent to each other at the remaining corner of the housing 10. The pull strap 30 passes through the sleeve 13 between two adjacent studs 12, making the pull strap 30 smoother during the retraction or extension process.

[0026] Figure 4 This is a schematic diagram of the coil spring in an embodiment of this utility model.

[0027] like Figure 4 As shown, the rotating recovery assembly 40 includes a coil spring 41, which is disposed inside the housing 10. One end of the coil spring 41 is connected to the second shaft segment 22 of the rotating shaft 20, and the other end of the coil spring 41 is connected to the housing 10. When the pull belt 30 is pulled out, the pull belt 30 drives the rotating shaft 30 to rotate, and the coil spring 41 tightens. When the evacuation door is closed, the coil spring 41 relaxes, driving the rotating shaft 30 to reverse, thereby retracting the pull belt 30. This ensures that the pull belt 30 is evenly wound around the first shaft segment 21, improving the recovery quality of the pull belt 30 and ensuring that the pull belt 30 can be pulled out normally when the evacuation door is opened next time. This improves the reliability of the structure and reduces the manpower consumption when closing the evacuation door.

[0028] The first shaft section 21 has flanged graphite copper sleeves 23 at both ends. The flanged graphite copper sleeves 23 can reduce the friction between the rotating shaft 20 and the housing 10 and the cover plate 11, making the rotation of the rotating shaft 20 more stable and smooth, and making the process of the pull belt 30 retracting or pulling out more stable and smooth.

[0029] The end of the pull strap 30 away from the pivot 20 is provided with a pull ring 31, which is used to connect to the door.

[0030] The role and effect of the embodiments

[0031] The evacuation door pull strap rotation and recovery device provided by this utility model includes a housing 10, a rotating shaft 20, and a pull strap 30. The housing 10 is rectangular in shape. The rotating shaft 20 is movably mounted on the housing 10. One end of the pull strap 30 is connected to the rotating shaft 20 and is wound around the rotating shaft 20. A rotation recovery assembly 40 is provided inside the housing 10 and is connected to the rotating shaft 20. When the evacuation door is closed, the rotation recovery assembly 40 can drive the rotating shaft 20 to rotate, thereby driving the pull strap 30 to retract and wrap around the rotating shaft 20. This improves the recovery quality of the pull strap 30 and ensures that the pull strap 30 can be pulled out normally when the evacuation door is opened next time. This improves the reliability of the structure and reduces the manpower consumption when closing the evacuation door. The evacuation door pull strap rotation and recovery device provided by this utility model can conveniently recover the pull strap when the evacuation door is closed, ensure the recovery quality of the pull strap, and ensure that the pull strap can be pulled out normally when the evacuation door is opened next time.

[0032] 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 rotary recovery device for evacuation door pull straps, characterized in that, It includes a housing (10), a rotating shaft (20) and a pull belt (30). The rotating shaft (20) is movably disposed on the housing (10), and the pull belt (30) is wound around the rotating shaft (20). A rotating recovery assembly (40) is provided inside the housing (10), and the rotating recovery assembly (40) is connected to the rotating shaft (20).

2. The evacuation door pull belt rotation and recovery device according to claim 1, characterized in that, The housing (10) has a cover plate (11) on one side, and one end of the rotating shaft (20) is movably connected to the cover plate (11).

3. The evacuation door pull belt rotation and recovery device according to claim 2, characterized in that, A stud (12) is provided between the housing (10) and the cover plate (11), and the two ends of the stud (12) are respectively connected to the housing (10) and the cover plate (11).

4. The evacuation door pull belt rotation and recovery device according to claim 3, characterized in that, A sleeve (13) is fitted onto the stud (12), and the sleeve (13) is located between the housing (10) and the cover plate (11).

5. The evacuation door pull belt rotation and recovery device according to claim 4, characterized in that, The rotating recovery assembly (40) includes a coil spring (41) disposed inside the housing (10). One end of the coil spring (41) is connected to the rotating shaft (20), and the other end of the coil spring (41) is connected to the housing (10).

6. The evacuation door pull belt rotary recovery device according to claim 5, characterized in that, The rotating shaft (20) includes a first shaft segment (21) and a second shaft segment (22), the first shaft segment (21) being located between the housing (10) and the cover plate (11), and the second shaft segment (22) being located inside the housing (10).

7. The evacuation door pull belt rotation and recovery device according to claim 6, characterized in that, The first shaft segment (21) has flanged graphite copper sleeves (23) at both ends.

8. The evacuation door pull belt rotary recovery device according to claim 7, characterized in that, The pull strap (30) has a pull ring (31) at one end away from the pivot (20).

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