Emergency evacuation ramp

Abstract

The utility model discloses an emergency evacuation ramp which comprises an evacuation ramp body and supporting legs installed on the two sides of the lower portion of the front end of the emergency evacuation ramp body, each supporting leg is of a parallelogram connecting rod structure, the side, extending out of the evacuation ramp body, of each supporting leg is connected with an evacuation ramp body connecting rod assembly through a connecting piece, and the other side of each supporting leg is connected with the evacuation ramp body through a tension spring. When the evacuation ramp is folded, the tension springs pull the supporting legs to be folded, the legs and the evacuation ramp are directly connected through the connecting pieces, tension spring structures on the connecting pieces are omitted, the structure is simplified, and installation is convenient.

Description

Technical Field

[0001] The utility model relates to a rail transit pedal, in particular to an emergency evacuation ramp. Background Art

[0002] An evacuation ramp is an emergency escape and evacuation device on rail transit vehicles. When deployed, it has outriggers at the front and rear to support the ramp on the platform. When the ramp is folded, the outriggers retract with it. Patent application CN 107685740 A discloses a retractable rail for an emergency escape and evacuation ramp on rail transit vehicles. The outriggers fold and unfold using a four-bar linkage, with symmetrical tension springs driving their deployment. This solution has a complex structure for driving the outriggers. Utility Model Content

[0003] Purpose of the utility model: The purpose of this utility model is to provide an emergency evacuation ramp with a simplified structure.

[0004] Technical solution: The emergency evacuation ramp described in the utility model includes an evacuation ramp and support legs installed on both sides below the front end of the emergency evacuation ramp. The support legs are parallelogram connecting rod structures. One side of the support legs extends out of the evacuation ramp and is connected to the evacuation ramp connecting rod assembly through a connecting piece, and the other side is connected to the evacuation ramp through a tension spring. When the evacuation ramp is folded, the tension spring pulls the support legs to fold.

[0005] Preferably, the base plate of the support leg is connected to the evacuation ramp, and a first pin for connecting the connecting piece is provided on one side of the support leg extending out of the evacuation ramp, and a second pin for connecting the tension spring is provided on the other side, and the distance between the first pin and the base plate is greater than the distance between the second pin and the base plate.

[0006] Preferably, notches are provided on both sides of the bottom plate, and when the legs are folded, the first pin shaft and the hinge shaft of the legs are located in the notches.

[0007] Preferably, a plurality of guide wheels for guiding the connecting parts are provided on the side of the ramp.

[0008] Preferably, the connecting rod assemblies on both sides of the evacuation ramp are connected by a shaft, and the connecting piece is connected to the connecting rod assembly through the shaft.

[0009] Preferably, the supporting legs on both sides of the evacuation ramp are staggered front and rear.

[0010] Preferably, the connecting member is a steel wire rope.

[0011] Beneficial effects: Compared with the prior art, the utility model has the following advantages: 1. Simplified structure and easy installation: the support legs and the evacuation ramp are directly connected through a connecting piece, eliminating the tension spring structure on the connecting piece; 2. The support legs operate synchronously with the evacuation ramp: when the evacuation ramp is unfolded, the evacuation ramp drives the connecting piece to move, and the connecting piece overcomes the tension of the tension spring to unfold the support legs; when retracted, the connecting piece relaxes, and the tension spring drives the support legs to fold and retract; 3. Reduced thickness: it can be stacked between evacuation ramps in a folded state, reducing the thickness of the support legs and the folded thickness of the evacuation ramp. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of the legs of the present invention in an expanded state;

[0013] Figure 2 This is a schematic diagram of the structure of the utility model with the legs in a folded state;

[0014] Figure 3 This is a structural schematic diagram of the evacuation ramp and the supporting legs of the utility model in the unfolded state after the supporting legs are assembled;

[0015] Figure 4 This is a schematic diagram of the bottom structure of the evacuation ramp of the present utility model. DETAILED DESCRIPTION

[0016] The technical solution of the present utility model will be further described below with reference to the accompanying drawings.

[0017] like Figure 4 , the front end of the evacuation ramp is connected to the left and right sides with support legs, and the left and right support legs are distributed front and back. Figure 1 The support leg on one side of the evacuation ramp is a parallelogram / four-bar structure, mainly composed of a base plate 77, a left connecting rod 79, a right connecting rod 73 and a support rod 71. The base plate 77 is used to connect to the evacuation ramp. After the support leg is unfolded, the support rod 71 is supported on the platform to provide support for the end of the evacuation ramp.

[0018] The left connecting rod 79 and the right connecting rod 73 are both provided in parallel. A reinforcing shaft 80 is provided in the middle of the left connecting rod 79, and the two ends are respectively hinged by shaft 82, shaft 78, bottom plate 77, and support rod 71. A reinforcing shaft 74 is provided in the middle of the right connecting rod 73, and the two ends are respectively hinged by shaft 76, shaft 72, bottom plate 77, and support rod 71. A pin 81 is provided between the shaft 82 and the shaft 80, and the pin 81 is used to connect the tension spring, such as Figures 2 to 4 , floor 77 and evacuation ramp right ( Figure 4When the evacuation ramp is folded, the tension spring 51 pulls the leg to fold and store it at the bottom of the evacuation ramp. Similarly, the tension spring 50 is used to connect the leg on the left side of the evacuation ramp.

[0019] A pin 75 is provided between shaft 76 and shaft 74. Pin 75 is used to connect to the steel wire rope 19 located on the right (upper) side of the evacuation ramp. The other end of the steel wire rope 19 passes around the guide wheel 47 at the bottom of the evacuation ramp and is connected to the connecting rod assembly (not shown) of the evacuation ramp. When the evacuation ramp is deployed, the connecting rod assembly rotates around the evacuation ramp, pulling the steel wire rope backward. The steel wire rope overcomes the tension of the tension spring 77 and drives the legs to deploy. The distance between shaft 82 and pin 81 is smaller than the distance between shaft 76 and pin 75, which facilitates the deployment of the evacuation ramp. A notch is provided on the bottom plate 77. When the legs are folded, the pin 75 and shaft 72 are located in the notch, reducing the thickness of the folded state and facilitating the folding of the evacuation ramp.

[0020] During actual assembly, in order to ensure uniform force on both sides, the connecting rod assemblies on both sides of the evacuation ramp are connected by a shaft rod, and the other end of the wire rope 19 is connected to the connecting rod assembly through the shaft rod.

Claims

1. An emergency evacuation ramp, comprising an evacuation ramp and supporting legs installed on both sides below the front end of the emergency evacuation ramp, wherein the supporting legs are parallelogram connecting rod structures, characterized in that: One side of the support leg extending out of the evacuation ramp is connected to the evacuation ramp connecting rod assembly via a connector (19), and the other side is connected to the evacuation ramp via a tension spring (51). When the evacuation ramp is folded, the tension spring (51) pulls the support leg to fold.

2. The emergency evacuation ramp according to claim 1, characterized in that: The base plate (77) of the support leg is connected to the evacuation ramp. A first pin (75) for connecting to a connecting member is provided on one side of the support leg extending out of the evacuation ramp, and a second pin (81) for connecting to a tension spring is provided on the other side. The distance between the first pin (75) and the base plate (77) is greater than the distance between the second pin (81) and the base plate (77).

3. The emergency evacuation ramp according to claim 2, characterized in that: Notches are provided on both sides of the bottom plate (77); when the legs are folded, the first pin shaft and the hinge shaft of the legs are located in the notches.

4. The emergency evacuation ramp according to claim 1, characterized in that: The evacuation ramp is provided with a plurality of guide wheels (47) for guiding the connecting pieces on the side.

5. The emergency evacuation ramp according to claim 1, characterized in that: The connecting rod assemblies on both sides of the evacuation ramp are connected through an axle rod, and the connecting piece is connected to the connecting rod assembly through the axle rod.

6. The emergency evacuation ramp according to claim 1, characterized in that: The legs on both sides of the evacuation ramp are staggered front and back.

7. The emergency evacuation ramp according to claim 1, characterized in that: The connecting piece (19) is a steel wire rope.

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