Emergency evacuation ramp apparatus capable of being automatically released

Abstract

Disclosed in the present invention is an emergency evacuation ramp apparatus capable of being automatically released. The apparatus comprises a first-stage ramp hingedly connected to a fixed frame and a second-stage ramp hingedly connected to the first-stage ramp; the first-stage ramp and the second-stage ramp are each provided with at least two hingedly connected panels, and the two panels located in the middle are movable panels; linkage rod systems are connected between the ends of the two movable panels away from each other and the fixed frame, and under the action of energy storage apparatuses, the linkage rod systems drive the first-stage ramp and the second-stage ramp to be unfolded or folded. The apparatus further comprises rotating mechanisms; one end of each rotating mechanism is connected to the corresponding linkage rod system, the other end of each rotating mechanism is connected to the corresponding movable panel, and the linkage rod systems can drive the two movable panels to flip; the energy storage apparatuses are connected between the first-stage ramp and a vehicle body; cables are connected to the first-stage ramp. According to the present invention, by means of a two-fold ramp and flippable movable panels, the space occupied by the evacuation ramp in a folded state is reduced in the length direction of a vehicle; and by means of linkage rod systems and gear drive pairs related thereto, one-press automatic unfolding of the two-fold ramp is achieved.

Description

Automatically released emergency evacuation ramp Technical Field

[0001] The invention relates to a rail transit evacuation device, in particular to an automatically released emergency evacuation ramp device. Background Art

[0002] To enable passengers to escape in an emergency, subway cars have permanent emergency evacuation systems in front of the driver's cab at both ends, including evacuation doors and ramps. To increase the driver's cab's observation area, the evacuation ramp must not block the evacuation door glass when folded. For example, patent CN110329291A discloses a four-folding technology, in which the ramp folds entirely below the glass area. However, this four-folding ramp takes up too much space in the vehicle's length direction and cannot meet space requirements. In response, patent CN103241251B discloses a two-folding technology, in which a two-stage large ramp frame folds inward, and a movable pedal folds in a diamond shape between the two-stage large ramp frame, thereby clearing the observation area. The two folding ramps fold inward in a diamond shape, and when released, the second-stage large ramp frame requires manual intervention or the addition of a complex additional power mechanism. In unmanned driving projects, if there is no professional crew intervention, there is a risk of affecting escape efficiency.

[0003] With the increasing requirements for the operational efficiency and automation level of urban rail transit, new fully automatic unmanned driving technologies have begun to be promoted and applied, and the driver's console has gradually been integrated into the passenger compartment. This requires the driver's console and the emergency evacuation system to reduce space occupancy as much as possible to increase passenger space; at the same time, in order to improve escape efficiency, the emergency evacuation system is required to automatically release with one button to reduce manual intervention. Taking the above requirements into consideration, the emergency evacuation ramp needs to have the characteristics of taking up little space in the direction of the vehicle length in the recovery state and automatically launching with one button.

[0004] Summary of the Invention

[0005] Purpose of the invention: The purpose of the present invention is to provide an emergency evacuation ramp device that occupies little space in the longitudinal direction of the vehicle in a recovered state and can be automatically released by one button.

[0006] Technical solution: The automatically releasable emergency evacuation ramp device described in the present invention includes a first-level ramp hinged on a fixed frame and a second-level ramp hinged to the first-level ramp; the first-level ramp and the second-level ramp are respectively provided with at least two hinged pedals, and the two pedals located at the hinge of the first-level ramp and the second-level ramp are both movable pedals; a linkage rod system is connected between the ends of the two movable pedals that are away from each other and the fixed frame, and the linkage rod system drives the first-level ramp and the second-level ramp to unfold or fold under the action of an energy storage device; a rotating mechanism is provided between the linkage rod system and the ends of the two movable pedals, one end of the rotating mechanism is connected to the linkage rod system, and the other end is connected to the movable pedal, so that the linkage rod system drives the two movable pedals to flip; a cable is connected between the first-level ramp and the fixed frame; an energy storage device for releasing and recovering the first-level ramp is connected between the first-level ramp and the vehicle body.

[0007] The linkage system, under the action of the energy storage device, drives the two movable pedals to flip outward. When flipping outward, that is, the movable pedals flip downward from above the fixed pedals, they can support loads as long as there are load points on the ramp. However, if they flip inward, that is, flip upward from below the fixed pedals, the ramp cannot directly support the movable pedals and requires an additional locking device. Therefore, the outward flipping movable pedals of the present invention simplify the device structure while achieving one-touch automatic deployment of the two folding ramps.

[0008] Among them, the linkage rod system includes a linkage rod with one end hinged to the fixed frame, a first-level linkage rotating rod hinged to the linkage rod, and a second-level linkage rotating rod hinged to the first-level linkage rotating rod; the middle part of the first-level linkage rotating rod is hinged to the middle part of the first-level ramp; the end of the second-level linkage rotating rod is hinged to the middle part of the second-level ramp.

[0009] Among them, the first-level ramp is provided with a first-level fixed pedal near the fixed frame end, and the first-level fixed pedal is hinged to the first-level movable pedal through the first-level pedal hinge; the first-level movable pedal can be flipped and folded toward the first-level fixed pedal with the first-level pedal hinge as the rotation center.

[0010] Among them, the secondary ramp is provided with a secondary fixed pedal away from the fixed frame end, and the secondary fixed pedal is hinged to the secondary movable pedal through a secondary pedal hinge; the secondary movable pedal can be flipped and folded toward the secondary fixed pedal with the secondary pedal hinge as the rotation center.

[0011] The rotation mechanism includes meshing driving gears and driven gears; the two movable pedals are fixed to their corresponding driven gears, and the linkage rod system is fixed to their corresponding driving gears; during the release or recovery process, the linkage rod system drives the corresponding driving gears to rotate, which in turn drives the driven gears and the movable pedals to rotate, thereby realizing the deployment and folding of the movable pedals. Specifically, the first-level movable pedal and the second-level movable pedal are fixed to their corresponding driven gears, and the first-level linkage rotating rod and the second-level linkage rotating rod are fixed to their corresponding driving gears; during the release or recovery process, the first-level linkage rotating rod and the second-level linkage rotating rod each drive the corresponding driving gear to rotate, thereby in turn driving the driven gears, the first-level movable pedal and the second-level movable pedal to rotate, thereby realizing the deployment and folding of the movable pedals.

[0012] Among them, the driving gear or the driven gear has an incomplete tooth structure. After the first-level movable pedal and the second-level movable pedal are unfolded into place, the driving gear or the driven gear is no longer engaged.

[0013] Among them, the sum of the length between the middle hinge point of the first-level linkage rotating rod and the hinge point between it and the second-level linkage rotating rod and the length of the second-level linkage rotating rod is greater than or equal to the sum of the side lengths of the two movable pedals; and it does not affect the unfolding and folding of the linkage rod system and the first-level ramp and the second-level ramp.

[0014] Among them, the energy storage device is an air spring with its two ends fixed to the vehicle body and the first-level ramp respectively; when it needs to be deployed, the first-level ramp is driven by the energy storage device to flip downward, and then drives the linkage rod system and the second-level ramp to deploy in sequence; when it needs to be retracted, the first-level ramp overcomes the force of the energy storage device and reaches the recovery end position, providing driving energy for the next deployment.

[0015] Wherein, the linkage rod system and the cables are symmetrically arranged on both sides of the first ramp and the second ramp.

[0016] Beneficial effects: Compared with the prior art, the present invention achieves the following significant effects: the compression of the space in the vehicle length direction when the evacuation ramp is retracted is achieved through two folding ramps and a reversible movable pedal, and the automatic one-button deployment of the two folding ramps is achieved through a linkage rod system and its related gear transmission pair. Therefore, the present invention can deploy the two movable pedals at the same time as the two folding ramp frames are deployed, achieving one-button automatic release, thereby simplifying the deployment steps of the emergency evacuation ramp and facilitating rapid escape in emergency situations. In addition, the movable pedal of the present invention is turned outward, and as long as there is a load-bearing point on the ramp, load-bearing can be achieved without the need for an additional locking device, thus streamlining the device structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] FIG1 is a rendering of the ramp of the present invention in an unfolded state;

[0018] FIG2 is a diagram of the ramp in the process of deployment;

[0019] FIG3 is a detailed view of the transmission gear at position 1 in FIG2 ;

[0020] FIG4 is a detailed view of the transmission gear at position II in FIG2 . DETAILED DESCRIPTION

[0021] The present invention is described in further detail below.

[0022] As shown in Figures 1-2, the present invention provides an automatically released emergency evacuation ramp device, comprising a primary ramp 1, a secondary ramp 2, a linkage system 3, a cable 4, an energy storage device 5, a fixed frame 6, a driving gear 7a, and a driven gear 7b. The primary ramp 1 is hingedly mounted on the fixed frame at its base, and the primary and secondary ramps 1 and 2 are hingedly connected.

[0023] A first-level fixed pedal 101 is provided at one end of the first ramp 1 close to the fixed frame 6, and the first-level fixed pedal 101 is hinged to the first-level movable pedal 102 via a first-level pedal hinge 103. Multiple fixed pedals can be provided as needed. A second-level fixed pedal 201 is provided at one end of the second ramp 2 away from the fixed frame 6, and the second-level fixed pedal 201 is hinged to the second-level movable pedal 202 via a second-level pedal hinge 203. The first-level movable pedal 102 can be flipped and folded from the top of the first-level fixed pedal 101 toward the first-level fixed pedal 101 with the first-level pedal hinge 103 as the rotation center, and the second-level movable pedal 202 can be flipped and folded from the top of the second-level fixed pedal 201 toward the second-level fixed pedal 201 with the second-level pedal hinge 203 as the rotation center. The first ramp 1 and the second-level ramp 2 have equal widths and similar lengths. The first fixed step 101 and the first movable step 102 are of equal length and width, dividing the first ramp 1 evenly along the ramp's length. The second fixed step 201 and the second movable step 202 are of equal length and width, dividing the second ramp 2 evenly along the ramp's length. When the first and second movable steps 102 and 202 are folded outward, a hollow area is left to avoid obstructing the evacuation door glass.

[0024] A linkage rod system 3 is provided on both sides of the first-level ramp 1 and the second-level ramp 2, and the linkage rod system includes a linkage rod 301, a first-level linkage rotating rod 302 and a second-level linkage rotating rod 303; one end of the linkage rod 301 is hinged to the fixed frame 6, and the other end is hinged to one end of the first-level linkage rotating rod 302, the other end of the first-level linkage rotating rod 302 is hinged to one end of the second-level linkage rotating rod 303, the middle part of the first-level linkage rotating rod 302 is hinged to the middle part of the first-level ramp 1, and the other end of the second-level linkage rotating rod 303 is hinged to the middle part of the first-level ramp 2.

[0025] A rotation mechanism is located in the middle of both sides of the primary ramp 1 and the secondary ramp 2. In this embodiment, the rotation mechanism comprises a gear pair, namely, a meshing driving gear 7a and a driven gear 7b. As shown in Figures 3 and 4, the primary and secondary movable pedals 102 and 202 are fixed to their corresponding driven gears 7b, and the primary and secondary linkage rotating rods 302 and 303 are fixed to their corresponding driving gears 7a. During the release or retrieval process, the primary and secondary linkage rotating rods 302 and 303 each rotate the corresponding driving gear 7a, which in turn rotates the driven gear 7b, the primary and secondary movable pedals 102 and 202, respectively, to achieve the deployment and folding of the movable pedals. To optimize the force applied to the gear pair, the driving gear 7a or the driven gear 7b can be configured as an incomplete tooth structure. After the primary and secondary movable pedals 102 and 202 are fully deployed, the driving gear 7a or the driven gear 7b no longer meshes. In this embodiment, the driving gear 7a has an incomplete tooth structure.

[0026] Cables 4 are fixedly connected between the top of both sides of the fixed frame and the ends of the first-level ramp; when the cables 4 are released or retracted, the first-level ramp 1 rotates under the traction of the cables 4, and drives the second-level ramp 2 to move along a specific trajectory through the linkage rod system 3.

[0027] One end of the energy storage device 5 is hinged to the vehicle, and the other end is hinged to the first ramp 1. Specifically, it can be hinged to the middle of the first ramp. The energy storage device 5 of this embodiment is an air spring.

[0028] Working process:

[0029] Recovered state: the first-level ramp 1 and the second-level ramp 2 are folded and maintained vertically on the fixed frame 6, the first-level movable pedal 102 is folded and leans against the first-level fixed pedal 101, the second-level movable pedal 202 is folded and leans against the second-level fixed pedal 201, and the linkage rod system 3 is folded and placed on both sides of the first-level ramp 1 and the second-level ramp 2.

[0030] Ramp deployment process: When deployment conditions are met, the primary ramp 1 flips downward under the action of the energy storage device 5, and the linkage rod system 3 moves with the primary ramp 1. Due to the action of the linkage rod system 3, the secondary ramp 2 begins to deploy, as shown in Figure 2. The primary linkage rotating rod 301 and the secondary linkage rotating rod 302 rotate relative to the primary ramp 1 and the secondary ramp 2. Under the action of the driving gear 7a and the driven gear 7b, the primary movable pedal 102 and the secondary movable pedal 202 are driven to rotate, and the primary movable pedal 102 and the secondary movable pedal 202 are moved from the folded state to the deployed state. After the primary movable pedal 102 and the secondary movable pedal 202 are fully deployed, the driving gear 7a is no longer engaged.

[0031] Deployed state: After the first-level ramp 1 and the second-level ramp 2 reach the fully deployed position, the cable 4 is fully extended, restraining the first-level ramp 1 from further rotation, thereby playing a load-bearing role; the tail end of the second-level ramp can fall on the driving track or a second-level cable can be added at the tail end of the second-level ramp 2 to provide a load-bearing point.

[0032] Ramp recovery process: During recovery, the first-level ramp 1 is driven to lift up by pulling the cable 4, and the first-level ramp 1, the second-level ramp 2, and the first-level linkage rod system 3 move in the opposite direction of the deployment action, and gradually change from the deployed state to the folded upright state; the linkage rotating rod 301 and the linkage rotating rod 302 rotate in the opposite direction, driving the first-level movable pedal 102 and the second-level movable pedal 202 to rotate in the opposite direction, and the first-level movable pedal 102 and the second-level movable pedal 202 gradually fold closer to the first-level fixed pedal 101 and the second-level fixed pedal 201 from the deployed state and finally fold together; at the end of the ramp recovery process, the first-level ramp 1 overcomes the force of the energy storage device and reaches the recovery end position, providing driving energy for the next deployment.

Claims

1. An automatically releasable emergency evacuation ramp device, characterized in that: The invention comprises a primary ramp (1) hinged on a fixed frame (6), and a secondary ramp (2) hinged to the primary ramp (1); a cable (4) is connected between the primary ramp (1) and the fixed frame (6); an energy storage device (5) for releasing and recovering the primary ramp (1) is connected between the primary ramp (1) and the vehicle body; the primary ramp (1) and the secondary ramp (2) are respectively provided with at least two hinged pedals, and the two pedals located at the hinge of the primary ramp (1) and the secondary ramp (2) are both movable pedals; a linkage rod system (3) is connected between the ends of the two movable pedals that are away from each other and the fixed frame (6), and a rotating mechanism is provided between the linkage rod system (3) and the ends of the two movable pedals, one end of the rotating mechanism is connected to the linkage rod system (3), and the other end is connected to the movable pedal, so that the linkage rod system (3) drives the two movable pedals to flip under the action of the energy storage device (5), thereby realizing the unfolding or folding of the primary ramp (1) and the secondary ramp (2).

2. The automatically releasable emergency evacuation ramp device according to claim 1, characterized in that: The linkage rod system (3) drives the two movable pedals to flip outwards under the action of the energy storage device (5).

3. The automatically releasable emergency evacuation ramp device according to claim 1, characterized in that: The linkage rod system (3) comprises a linkage rod (301) with one end hinged to a fixed frame (6), a primary linkage rotating rod (302) hinged to the linkage rod (301), and a secondary linkage rotating rod (303) hinged to the primary linkage rotating rod (302).

4. The automatically releasable emergency evacuation ramp device according to claim 3, characterized in that: The middle part of the primary linkage rotating rod (302) is hinged to the middle part of the primary ramp (1); and the end part of the secondary linkage rotating rod (303) is hinged to the middle part of the secondary ramp (2).

5. The automatically releasable emergency evacuation ramp device according to claim 1, characterized in that: The first-level ramp (1) is provided with a first-level fixed pedal (101) at the end close to the fixed frame (6), and a first-level movable pedal (102) which is hinged to the first-level fixed pedal (101) and can be flipped and folded from above the first-level fixed pedal (101) to the direction of the first-level fixed pedal (101).

6. The automatically releasable emergency evacuation ramp device according to claim 1, characterized in that: The secondary ramp (2) is provided with a secondary fixed pedal (201) at the end away from the fixed frame (6), and a secondary movable pedal (202) which is hinged to the secondary fixed pedal (201) and can be flipped and folded from the upper side of the secondary fixed pedal (101) to the direction of the secondary fixed pedal (201).

7. The automatically releasable emergency evacuation ramp device according to claim 1, characterized in that: The rotating mechanism comprises a meshing driving gear (7a) and a driven gear (7b); the two movable pedals are fixed to the corresponding driven gears (7b), and the linkage rod system (3) is fixed to the corresponding driving gears (7a); during the release or recovery process, the linkage rod system (3) drives the corresponding driving gear (7a) to rotate, and then drives the driven gear (7b) and the movable pedal to rotate in turn, so as to realize the unfolding and folding of the movable pedal.

8. The automatically releasable emergency evacuation ramp device according to claim 7, characterized in that: The driving gear (7a) or the driven gear (7b) is an incomplete tooth structure, and after the two movable pedals are unfolded to their proper positions, the driving gear (7a) or the driven gear (7b) is no longer meshed.

9. The automatically releasable emergency evacuation ramp device according to claim 3, characterized in that: The sum of the length between the middle hinge point of the primary linkage rotating rod (302) and the hinge point between the primary linkage rotating rod (302) and the secondary linkage rotating rod (303) is greater than or equal to the sum of the side lengths of the two movable pedals.

10. The automatically releasable emergency evacuation ramp device according to claim 1, characterized in that: The energy storage device (5) comprises an air spring with two ends respectively fixed to the bottom of the fixed frame (6) and the first-level ramp (1).

Images