Automatically releasable emergency evacuation ramp device

Abstract

The present invention discloses an emergency evacuation ramp device that can be automatically released, which includes a first-level ramp hinged to a fixed frame and a second-level ramp hinged to the first-level ramp; at least two hinged pedals are respectively provided on the first-level ramp and the second-level ramp, and the two middle pedals are movable pedals; linkage systems are connected between the ends of the two movable pedals away from each other and the fixed frame, and the linkage systems drive 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 further included, one end of the rotating mechanism is connected to the linkage system, and the other end is connected to the movable pedal, and the linkage system can drive the two movable pedals to flip; an energy storage device is connected between the first-level ramp and the vehicle body; a cable is connected to the first-level ramp. The present invention realizes the compression of the space in the vehicle body length direction in the recovery state of the evacuation ramp through the two-folded ramps and the flippable movable pedals, and realizes the one-key automatic unfolding of the two-folded ramps through the linkage system and its related gear transmission pairs.

Description

Technical Field

[0001] The present invention relates to an evacuation device for rail transit, and particularly to an emergency evacuation ramp device that can be automatically released. Background Art

[0002] To enable passengers to escape in an emergency, an emergency evacuation system is usually installed in front of the driver's cabs at both ends of the subway, including an evacuation door and an evacuation ramp. To increase the observation area of the driver's cab, when the evacuation ramp is folded, it cannot block the evacuation door glass. For example, Patent CN110329291A discloses a four-fold technology, where the ramp is folded entirely below the glass area. However, this four-fold ramp has a large space requirement in the vehicle length direction and cannot meet the space needs. In response to this, Patent CN103241251B discloses a two-fold technology, where the two large ramp frames are folded inward, and the movable pedal is diamond-folded in the middle of the two large ramp frames, thereby clearing the observation area. The above two-fold ramp folds inward in a diamond shape. When released, the second large ramp frame requires manual intervention or the addition of a complex additional power mechanism. In a driverless project, without the intervention of professional crew members, there is a risk of affecting the escape efficiency.

[0003] With the increasing requirements for the operation efficiency and automation level of urban rail transit, new fully automatic driverless technologies have begun to be popularized and applied. The driver's console is gradually integrated into the passenger compartment. This requires the driver's console and the emergency evacuation system to occupy as little space as possible to increase the passenger space. At the same time, to improve the escape efficiency, it is required that the emergency evacuation system be automatically released with one key and manual intervention be reduced. Considering the above requirements, the emergency evacuation ramp needs to have the characteristics of small space occupation in the vehicle length direction in the retracted state and one-key automatic deployment. Summary of the Invention

[0004] Object of the Invention: The object of the present invention is to provide an automatically releasable emergency evacuation ramp device that occupies a small space in the vehicle length direction in the retracted state and can be automatically deployed with one key.

[0005] Technical Solution: The automatically releasable emergency evacuation ramp device described in the present invention includes a first-stage ramp hinged to a fixed frame and a second-stage ramp hinged to the first-stage ramp. At least two hinged pedals are provided on the first-stage ramp and the second-stage ramp respectively. The two pedals located at the hinge between the first-stage ramp and the second-stage ramp are both movable pedals. Linkage systems are connected between the ends of the two movable pedals that are away from each other and the fixed frame. Under the action of an energy storage device, the linkage systems drive the first-stage ramp and the second-stage ramp to deploy or fold. Rotating mechanisms are provided between the linkage systems and the ends of the two movable pedals. One end of the rotating mechanism is connected to the linkage system, and the other end is connected to the movable pedal, so that the linkage system drives the two movable pedals to flip. A cable is connected between the first-stage ramp and the fixed frame. An energy storage device for releasing and retracting the first-stage ramp is connected between the first-stage ramp and the vehicle body.

[0006] Among them, the linkage rod system drives the two movable pedals to turn outwards under the action of the energy storage device. Turning outwards means that the movable pedal turns downwards from above the fixed pedal. At this time, as long as there is a bearing point on the ramp, bearing can be achieved. If it turns inwards, that is, turns upwards from below the fixed pedal, the ramp cannot directly bear the movable pedal, and an additional locking device needs to be set. Therefore, the movable pedal set in the present invention turns outwards, which simplifies the device structure on the premise of realizing the one-key automatic unfolding of the two-folded ramps.

[0007] Among them, the linkage rod system includes a linkage rod hinged at one end to the fixed frame, a first-stage linkage rotating rod hinged to the linkage rod, and a second-stage linkage rotating rod hinged to the first-stage linkage rotating rod; the middle of the first-stage linkage rotating rod is hinged to the middle of the first-stage ramp; the end of the second-stage linkage rotating rod is hinged to the middle of the second-stage ramp.

[0008] Among them, a first-stage fixed pedal is provided at the end of the first-stage ramp close to the fixed frame, and the first-stage fixed pedal is hinged to the first-stage movable pedal through a first-stage pedal hinge; the first-stage movable pedal can be turned and folded towards the first-stage fixed pedal with the first-stage pedal hinge as the rotation center.

[0009] Among them, a second-stage fixed pedal is provided at the end of the second-stage ramp away from the fixed frame, and the second-stage fixed pedal is hinged to the second-stage movable pedal through a second-stage pedal hinge; the second-stage movable pedal can be turned and folded towards the second-stage fixed pedal with the second-stage pedal hinge as the rotation center.

[0010] Among them, the rotating mechanism includes a driving gear and a driven gear that mesh with each other; the two movable pedals are fixed to their respective corresponding driven gears, and the linkage rod system is fixed to their respective corresponding driving gears; during the release or recovery process, the linkage rod system drives the corresponding driving gear to rotate, and then drives the driven gear and the movable pedal to rotate in sequence, realizing the unfolding and folding of the movable pedal. Specifically, the first-stage movable pedal and the second-stage movable pedal are fixed to their respective corresponding driven gears, and the first-stage linkage rotating rod and the second-stage linkage rotating rod are fixed to their respective corresponding driving gears; during the release or recovery process, the first-stage linkage rotating rod and the second-stage linkage rotating rod drive their corresponding driving gears to rotate respectively, and then drive the driven gear, the first-stage movable pedal and the second-stage movable pedal to rotate in sequence, realizing the unfolding and folding of the movable pedal.

[0011] Among them, the driving gear or the driven gear is an incomplete tooth structure, and after the first-stage movable pedal and the second-stage movable pedal are unfolded in place, the driving gear or the driven gear no longer meshes.

[0012] Among them, the sum of the length between the middle hinge point of the first-stage linkage rotating rod and its hinge point with the second-stage linkage rotating rod and the length of the second-stage 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 with the first-stage ramp and the second-stage ramp.

[0013] Among them, the energy storage device is an air spring with two ends respectively fixed to the vehicle body and the first-level ramp; when it needs to be deployed, the first-level ramp is driven by the energy storage device and turns downward, and then drives the linkage system and the second-level ramp to deploy in sequence; when it needs to be retracted, the first-level ramp overcomes the acting force of the energy storage device and reaches the retraction end position to provide driving energy for the next deployment.

[0014] Among them, the linkage system and the cable are symmetrically arranged on both sides of the first-level ramp and the second-level ramp.

[0015] Beneficial effects: Compared with the prior art, the present invention has the following remarkable effects: By means of two folding ramps and a flip-up movable pedal, the space in the vehicle length direction is compressed in the retracted state of the evacuation ramp, and through the linkage system and its related gear transmission pairs, the two folding ramps are automatically deployed with one key. Therefore, the present invention can deploy the two movable pedals while the two folding ramp frames are deployed, realizing one-key automatic release, thus simplifying the deployment steps of the emergency evacuation ramp and facilitating rapid escape in case of emergency. In addition, the movable pedal of the present invention turns outwards, and as long as there is a bearing point on the ramp, it can achieve bearing without setting an additional locking device, simplifying the device structure. Description of the Drawings

[0016] Figure 1 is the effect diagram of the deployed state of the ramp of the present invention;

[0017] Figure 2 is the diagram of the ramp during the deployment process;

[0018] Figure 3 is Figure 2 the detailed diagram of the transmission gear at I in

[0019] Figure 4 is Figure 2 the detailed diagram of the transmission gear at II in Detailed Embodiment

[0020] The present invention will be further described in detail below.

[0021] As Figure 1-2 shown, the present invention provides an automatically releasable emergency evacuation ramp device, including a first-level ramp 1, a second-level 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 root of the first-level ramp 1 is hinged and installed on the fixed frame, and the first-level ramp 1 and the second-level ramp 2 are hinged to each other.

[0022] At one end of the first - level ramp 1 near the fixed frame 6, there is a first - level fixed pedal 101. The first - level fixed pedal 101 is hinged to the first - level movable pedal 102 through a first - level pedal hinge 103. As needed, multiple fixed pedals can be set. At one end of the second - level ramp 2 far from the fixed frame 6, there is a second - level fixed pedal 201. The second - level fixed pedal 201 is hinged to the second - level movable pedal 202 through a second - level pedal hinge 203. The first - level movable pedal 102 can be flipped and folded from above the first - level fixed pedal 101 towards 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 above the second - level fixed pedal 201 towards the second - level fixed pedal 201 with the second - level pedal hinge 203 as the rotation center. The widths of the first - level ramp 1 and the second - level ramp 2 are equal, and the lengths are similar. The lengths and widths of the first - level fixed pedal 101 and the first - level movable pedal 102 are equal, and the first - level ramp 1 is evenly divided along the length direction of the ramp; the lengths and widths of the second - level fixed pedal 201 and the second - level movable pedal 202 are equal, and the second - level ramp 2 is evenly divided along the length direction of the ramp. After the first - level movable pedal 102 and the second - level movable pedal 202 are flipped and folded outwards respectively, a hollow area is left to avoid blocking the evacuation door glass.

[0023] Linkage rod systems 3 are provided on both sides of the first - level ramp 1 and the second - level ramp 2. 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 second - level ramp 2.

[0024] Rotating mechanisms are provided at the middle positions on both sides of the first - level ramp 1 and the second - level ramp 2. The rotating mechanism in this embodiment is a gear pair, that is, a meshing driving gear 7a and a driven gear 7b. As shown in Figure 3 , 4 the first - level movable pedal 102 and the second - level movable pedal 202 are fixed to their corresponding driven gears 7b, and the first - level linkage rotating rod 302 and the second - level linkage rotating rod 303 are fixed to their corresponding driving gears 7a. During the release or recovery process, the first - level linkage rotating rod 302 and the second - level linkage rotating rod 303 each drive their corresponding driving gears 7a to rotate, and then successively drive the driven gears 7b, the first - level movable pedal 102, and the second - level movable pedal 202 to rotate, realizing the unfolding and folding of the movable pedals. To optimize the force on the gear pair, the driving gear 7a or the driven gear 7b can be set as an incomplete - tooth structure, and the driving gear 7a or the driven gear 7b no longer meshes after the first - level movable pedal 102 and the second - level movable pedal 202 are unfolded in place. The driving gear 7a in this embodiment is an incomplete - tooth structure.

[0025] Cables 4 are fixedly connected between the top parts on both sides of the fixed frame and the ends of the first-level ramp respectively; 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 system 3.

[0026] One end of the energy storage device 5 is hinged to the vehicle, and the other end is hinged to the first-level ramp 1; specifically, it can be hinged to the middle of the first-level ramp. The energy storage device 5 in this embodiment is an air spring.

[0027] Working process:

[0028] Recovery state: The first-level ramp 1 and the second-level ramp 2 are folded and held vertically on the fixed frame 6. The first-level movable pedal 102 is folded against the first-level fixed pedal 101, the second-level movable pedal 202 is folded against the second-level fixed pedal 201, and the linkage system 3 is folded on both sides of the first-level ramp 1 and the second-level ramp 2.

[0029] Ramp unfolding process: When the unfolding condition is met, the first-level ramp 1 flips downward under the action of the energy storage device 5, and the linkage system 3 moves together with the first-level ramp 1. Due to the action of the linkage system 3, the second-level ramp 2 begins to unfold, as Figure 2 shown; the first-level linkage rod 301 and the second-level linkage rod 302 rotate relative to the first-level ramp 1 and the second-level ramp 2. Under the action of the driving gear 7a and the driven gear 7b, the first-level movable pedal 102 and the second-level movable pedal 202 are driven to rotate, and the first-level movable pedal 102 and the second-level movable pedal 202 change from the folded state to the unfolded state. After the first-level movable pedal 102 and the second-level movable pedal 202 are unfolded in place, the driving gear 7a is no longer engaged.

[0030] Unfolding state: After the first-level ramp 1 and the second-level ramp 2 reach the fully unfolded position, the cable 4 is fully extended in place, restricting the first-level ramp 1 from continuing to rotate, thus playing a bearing role; the end of the second-level ramp can fall on the running track or provide a bearing point by adding a second cable at the end of the second-level ramp 2.

[0031] Ramp recovery process: During recovery, by pulling the cable 4, the first-level ramp 1 is lifted, and the first-level ramp 1, the second-level ramp 2, and the first-level linkage system 3 move in the opposite direction of the unfolding action and gradually change from the unfolded state to the folded and erected state; the linkage rod 301 and the linkage rod 302 rotate in the reverse direction, driving the first-level movable pedal 102 and the second-level movable pedal 202 to rotate in the reverse direction. The first-level movable pedal 102 and the second-level movable pedal 202 gradually fold and approach the first-level fixed pedal 101 and the second-level fixed pedal 201 and finally fold together; at the end of the ramp recovery process, the first-level ramp 1 overcomes the acting force of the energy storage device and reaches the recovery termination position, providing driving energy for the next unfolding.

Claims

1. An automatically releasable emergency evacuation ramp device, characterized in that, it includes a first-level ramp (1) hinged to a fixed frame (6), and a second-level ramp (2) hinged to the first-level ramp (1); a cable (4) is connected between the first-level ramp (1) and the fixed frame (6); an energy storage device (5) for releasing and recovering the first-level ramp (1) is connected between the first-level ramp (1) and the vehicle body; at least two hinged pedals are respectively provided on the first-level ramp (1) and the second-level ramp (2), and the two pedals located at the hinge of the first-level ramp (1) and the second-level ramp (2) are both movable pedals; a linkage system (3) is connected between the ends of the two movable pedals away from each other and the fixed frame (6), and a rotating mechanism is provided between the linkage system (3) and the ends of the two movable pedals. One end of the rotating mechanism is connected to the linkage system (3), and the other end is connected to the movable pedal, so that the linkage system (3) drives the two movable pedals to flip under the action of the energy storage device (5), realizing the deployment or folding of the first-level ramp (1) and the second-level ramp (2).

2. The automatically releasable emergency evacuation ramp device according to claim 1, characterized in that, the linkage 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 system (3) includes a linkage rod (301) hinged at one end to the fixed frame (6), a first-level linkage rotating rod (302) hinged to the linkage rod (301), and a second-level linkage rotating rod (303) hinged to the first-level linkage rotating rod (302).

4. The automatically releasable emergency evacuation ramp device according to claim 3, characterized in that, the middle of the first-level linkage rotating rod (302) is hinged to the middle of the first-level ramp (1); the end of the second-level linkage rotating rod (303) is hinged to the middle of the second-level ramp (2).

5. The automatically releasable emergency evacuation ramp device according to claim 1, characterized in that, a first-level fixed pedal (101) is provided at the end of the first-level ramp (1) close to the fixed frame (6), and a first-level movable pedal (102) hinged to the first-level fixed pedal (101) and capable of flipping and folding from above the first-level fixed pedal (101) towards the first-level fixed pedal (101).

6. The automatically releasable emergency evacuation ramp device according to claim 1, characterized in that, a second-level fixed pedal (201) is provided at the end of the second-level ramp (2) away from the fixed frame (6), and a second-level movable pedal (202) hinged to the second-level fixed pedal (201) and capable of flipping and folding from above the second-level fixed pedal (201) towards the second-level fixed pedal (201).

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

8. The automatically releasable emergency evacuation ramp device according to claim 7, wherein, the driving gear (7a) or the driven gear (7b) is an incomplete tooth structure, and after the two movable pedals are unfolded in place, the driving gear (7a) or the driven gear (7b) no longer meshes.

9. The automatically releasable emergency evacuation ramp device according to claim 3, wherein, the sum of the length between the middle hinge point of the first-level linkage rod (302) and its hinge point with the second-level linkage rod (303) and the length of the second-level linkage 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, wherein, the energy storage device (5) includes an air spring with two ends respectively fixed to the bottom of the fixed frame (6) and the first-level ramp (1).

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