Ratchet device for subway emergency evacuation door

Abstract

This utility model discloses a ratchet device for subway emergency evacuation doors, including a U-shaped seat for the retractor rope, a rope safety pin, a first shaft, a U-shaped seat for the ratchet, a second shaft, a ratchet bar, a ratchet body, a rotating support rod, and a safety rope. The rope safety pin is sleeved in the U-shaped seat for the retractor rope and is sleeved in the main support. In this utility model, the main support supports the U-shaped seat for the retractor rope, the ratchet bar, and the ratchet body. The ratchet bar is locked by the elastic force of a second spring, and the first spring provides the return force for the handle. The entire device is made of stainless steel. Pulling the handle can push the ratchet body to rotate from the outside, optimizing the traditional top-pressing ratchet drive structure and achieving a low-wear effect. Simultaneously, the safety rope is fixed to the rope safety pin for safety locking. Releasing the restriction of the safety rope allows the ratchet body to rotate and unlock, making it suitable for high-frequency use scenarios such as subways.

Description

Technical Field

[0001] This utility model relates to the field of ratchet technology, and in particular to a ratchet device for emergency evacuation doors in subways. Background Technology

[0002] As one of the core components of the rail transit safety system, the ratchet device of the subway emergency evacuation door directly affects the reliability of the equipment and the efficiency of emergency response. In recent years, with the acceleration of global urbanization and the expansion of rail transit networks, the market demand for subway safety equipment has continued to grow. Due to its high-precision locking, rapid release and durability, the ratchet device has become a key technical component in the design of emergency evacuation doors. Ratchet mechanisms achieve one-way locking through the meshing of ratchet teeth and pawls, and are widely used in mechanical transmission and safety equipment; in the subway field, they are mainly used for the opening and closing control and self-locking protection of emergency evacuation doors. Some manufacturers have launched smart ratchet devices that integrate sensors and IoT technology, which can monitor equipment status in real time and control it remotely, improving emergency response efficiency. At the same time, it is necessary to develop a ratchet device for subway emergency evacuation doors with a low-wear ratchet structure and a one-button emergency unlocking function, specifically for the high-frequency use of subways. Utility Model Content

[0003] The purpose of this invention is to provide a ratchet device for subway emergency evacuation doors, which is designed to develop a low-wear ratchet structure for high-frequency subway use scenarios.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a ratchet device for subway emergency evacuation doors, comprising a U-shaped seat for a retractor rope, a rope safety pin, a main bracket, a U-shaped seat assembly frame, a first shaft, a ratchet U-shaped seat, a second shaft, a rope retractor safety pin, a first spring, a handle rod, a handle protective sleeve, a third shaft, a ratchet bar, a ratchet body, a side groove, a rotating support rod, a ratchet bushing, a second spring, a fourth shaft, a fifth shaft, a connecting bushing, and... The safety rope includes a safety pin fitted into the U-shaped seat of the retractor rope, which is fitted into the main support. A first shaft is provided in the U-shaped seat of the retractor rope, which is fitted into the ratchet U-shaped seat. A second shaft is fitted into the groove at the bottom of the ratchet U-shaped seat, which is fitted into the safety pin of the retractor. A third shaft is fitted into the main support, which is fitted into the ratchet bar. The ratchet bar is engaged with the ratchet body, which is fitted into the safety pin of the rope.

[0005] As a further technical solution of this utility model, the safety pin of the rope and the main bracket are fixed to each other by a snap ring, and a U-shaped seat assembly frame is fixedly connected to the main bracket.

[0006] As a further technical solution of this utility model, one end of the safety pin of the rope reel is slidably connected to the U-shaped seat of the reel rope, and a first spring is provided between the U-shaped seat of the reel rope and the safety pin of the rope reel.

[0007] As a further technical solution of this utility model, a handle rod is provided on the U-shaped seat of the retractor rope, and a handle protective sleeve is sleeved on the handle rod.

[0008] As a further technical solution of this utility model, the second shaft is sleeved in the side groove, and the side groove is opened on the main support.

[0009] As a further technical solution of this utility model, a ratchet bushing is provided between the ratchet bars, and a rotating support rod is rotatably connected to the ratchet bushing. The bottom end of the rotating support rod is slidably connected to a slot opened at the bottom of the main bracket, and a second spring is provided between the main bracket and the ratchet bushing, and the second spring is sleeved on the rotating support rod.

[0010] As a further technical solution of this utility model, a fourth shaft and a fifth shaft are respectively provided between the main supports, and a connecting sleeve is sleeved on the fourth shaft. A safety rope is sleeved between the connecting sleeve and the fifth shaft, and one end of the safety rope is fixed on the rope safety pin.

[0011] This utility model provides a ratchet device for subway emergency evacuation doors, which has the following advantages: the rope reel safety pin in the main bracket supports the U-shaped seat of the reel rope, the ratchet bar, and the ratchet body. The ratchet bar, under the elastic force of the second spring, presses against the ratchet teeth of the ratchet body to achieve locking. The first shaft in the U-shaped seat of the reel rope supports the U-shaped seat of the ratchet and the handle bar. The first spring between the U-shaped seat of the reel rope and the rope reel safety pin provides the return elastic force of the handle bar. The whole device is made of stainless steel. Pulling the handle bar can push the ratchet body to rotate from the outside. This optimizes the traditional drive structure of pressing the ratchet teeth and achieves a low wear effect. At the same time, the safety rope passing through the fifth shaft and the connecting bushing is fixed on the rope safety pin for safety locking. Releasing the restriction of the safety rope allows the ratchet body to be rotated to unlock. This device can be adapted to high-frequency use scenarios such as subways. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a three-dimensional view of the overall structure of this utility model; Figure 2 This is a side view of the structure of this utility model; Figure 3 This is an exploded view of the overall structure of this utility model.

[0014] In the diagram: 1. Retractor rope U-shaped seat; 2. Rope safety pin; 3. Main support; 4. U-shaped seat assembly frame; 5. First shaft; 6. Ratchet U-shaped seat; 7. Second shaft; 8. Rope retractor safety pin; 9. First spring; 10. Handle lever; 11. Handle protective sleeve; 12. Third shaft; 13. Ratchet; 14. Ratchet body; 15. Side groove; 16. Rotating support rod; 17. Ratchet bushing; 18. Second spring; 19. Fourth shaft; 20. Fifth shaft; 21. Connecting bushing; 22. Safety rope. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0016] Please see the appendix Figure 1 - Appendix Figure 3This utility model provides an embodiment of a ratchet device for subway emergency evacuation doors, comprising a U-shaped seat for a retractor rope 1, a rope safety pin 2, a main support 3, a U-shaped seat assembly frame 4, a first shaft 5, a ratchet U-shaped seat 6, a second shaft 7, a rope retractor safety pin 8, a first spring 9, a handle rod 10, a handle protective sleeve 11, a third shaft 12, a ratchet 13, a ratchet body 14, a side groove 15, a rotating support rod 16, a ratchet bushing 17, a second spring 18, a fourth shaft 19, a fifth shaft 20, a connecting bushing 21, and a safety rope 22. A rope safety pin 2 is fitted into seat 1, and the rope safety pin 2 is fitted into the main support 3. A first shaft 5 is provided in the U-shaped seat 1 of the winder rope, and the first shaft 5 is fitted into the ratchet U-shaped seat 6. A second shaft 7 is fitted into the groove at the bottom of the ratchet U-shaped seat 6, and the second shaft 7 is fitted into the rope winder safety pin 8. A third shaft 12 is fitted into the main support 3, and the third shaft 12 is fitted into the ratchet 13. The ratchet 13 is engaged with the ratchet body 14, and the ratchet body 14 is fitted into the rope safety pin 2. The rope safety pin 2 and the main support 3 are fixed to each other by a retaining spring, and the main support... A U-shaped seat assembly frame 4 is fixedly connected to the main support 3; one end of the rope reel safety pin 8 is slidably connected to the U-shaped seat 1 of the reel rope, and a first spring 9 is provided between the U-shaped seat 1 of the reel rope and the safety pin 8; a handle rod 10 is provided on the U-shaped seat 1 of the reel rope, and a handle protective sleeve 11 is sleeved on the handle rod 10; a second shaft 7 is sleeved in the side groove 15, and the side groove 15 is opened on the main support 3; a ratchet bushing 17 is provided between the ratchet bars 13, and a rotating support rod 16 is rotatably connected to the ratchet bushing 17, and the bottom end of the rotating support rod 16 is slidably connected to the main support. A second spring 18 is provided in the slot at the bottom of the main support 3 and between the main support 3 and the ratchet bushing 17, and the second spring 18 is sleeved on the rotating support rod 16; a fourth shaft 19 and a fifth shaft 20 are respectively provided between the main supports 3, and a connecting shaft sleeve 21 is sleeved on the fourth shaft 19. A safety rope 22 is sleeved between the connecting shaft sleeve 21 and the fifth shaft 20. One end of the safety rope 22 is fixed on the rope safety pin 2. The connecting shaft sleeve 21 and the fifth shaft 20 are used to limit the safety rope 22 to prevent the safety rope 22 from getting tangled in other parts of the device and causing wear. Specifically, in use, the rope reel safety pin 8 in the main bracket 3 supports the reel rope U-shaped seat 1, ratchet 13, and ratchet body 14. The ratchet 13, under the elastic force of the second spring 18, presses against the ratchet teeth of the ratchet body 14 to achieve locking. The first shaft 5 in the reel rope U-shaped seat 1 supports the ratchet U-shaped seat 6 and the handle 10. The first spring 9 between the reel rope U-shaped seat 1 and the rope reel safety pin 8 provides the reset elastic force for the handle 10. The whole is made of stainless steel. Pulling the handle 10 can push the ratchet body 14 to rotate from the outside, which optimizes the traditional drive structure of pressing the ratchet teeth and achieves a low wear effect. At the same time, the safety rope 22 passing through the fifth shaft 20 and the connecting bushing 21 is fixed on the rope safety pin 2 for safety locking. Releasing the restriction of the safety rope 22 allows the ratchet body 14 to be rotated to unlock. It can be adapted to high-frequency use scenarios such as subways.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0019] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A ratchet device for an emergency evacuation door in a subway, comprising a U-shaped seat for a retractor rope (1), a rope safety pin (2), a main support (3), a U-shaped seat assembly frame (4), a first shaft (5), a ratchet U-shaped seat (6), a second shaft (7), a rope retractor safety pin (8), a first spring (9), a handle rod (10), a handle protective sleeve (11), a third shaft (12), a ratchet bar (13), a ratchet body (14), a side slot (15), a rotating support rod (16), a ratchet bushing (17), a second spring (18), a fourth shaft (19), a fifth shaft (20), a connecting bushing (21), and a safety rope (22), characterized in that: The retractor rope U-shaped seat (1) is fitted with a rope safety pin (2), which is fitted in the main bracket (3). The retractor rope U-shaped seat (1) is provided with a first shaft (5), which is fitted on the ratchet U-shaped seat (6). The ratchet U-shaped seat (6) has a second shaft (7) fitted in the groove at the bottom of the ratchet U-shaped seat (6), which is fitted on the rope retractor safety pin (8). The main bracket (3) has a third shaft (12) fitted on the ratchet bar (13), which is engaged with the ratchet body (14). The ratchet body (14) is fitted on the rope safety pin (2).

2. The ratchet device for the emergency evacuation door of the subway according to claim 1, characterized in that: The safety pin (2) of the rope and the main support (3) are fixed to each other by a snap ring, and a U-shaped seat assembly frame (4) is fixedly connected to the main support (3).

3. The ratchet device for the emergency evacuation door of the subway according to claim 1, characterized in that: One end of the rope reel safety pin (8) is slidably connected to the reel rope U-shaped seat (1), and a first spring (9) is provided between the reel rope U-shaped seat (1) and the rope reel safety pin (8).

4. The ratchet device for use in the emergency evacuation door of a subway according to claim 3, characterized in that: The retractor cord U-shaped seat (1) is provided with a handle rod (10), and a handle protective sleeve (11) is sleeved on the handle rod (10).

5. The ratchet device for use in the emergency evacuation door of a subway as defined in claim 1, wherein: The second shaft (7) is fitted into the side slot (15), and the side slot (15) is opened on the main bracket (3).

6. A ratchet device for an emergency evacuation door in a subway according to claim 1, characterized in that: A ratchet bushing (17) is provided between the ratchet bars (13), and a rotating support rod (16) is rotatably connected to the ratchet bushing (17). The bottom end of the rotating support rod (16) is slidably connected to the slot opened at the bottom of the main bracket (3), and a second spring (18) is provided between the main bracket (3) and the ratchet bushing (17), and the second spring (18) is sleeved on the rotating support rod (16).

7. A ratchet device for a subway emergency evacuation door according to claim 6, characterized in that: A fourth shaft (19) and a fifth shaft (20) are respectively provided between the main support (3), and a connecting sleeve (21) is sleeved on the fourth shaft (19). A safety rope (22) is sleeved between the connecting sleeve (21) and the fifth shaft (20), and one end of the safety rope (22) is fixed on the rope safety pin (2).

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