Folding structure of rapid emergency boarding ladder of motor train unit

Abstract

The utility model belongs to the technical field of emergency boarding ladders, and particularly relates to a folding structure of a rapid emergency boarding ladder of a motor train unit, which comprises two outer tubes, supporting blocks are hinged to the bottom ends of the two outer tubes, two reinforcing rods and a first foot rest lever are fixed between the two outer tubes, and the first foot rest lever is hinged to the supporting blocks. A multi-connecting-rod assembly is installed behind the first foot rest lever, positioning assemblies are installed on the sides, deviating from each other, of the tops of the two outer pipes, a first inner pipe, a second inner pipe, a third inner pipe, a fourth inner pipe and fifth inner pipes are sequentially installed on the inner sides of the outer pipes in a sliding mode, and a second foot rest lever is fixedly connected between the top ends of the left fifth inner pipe and the right fifth inner pipe. Third foot rest levers are fixed between the top ends of the first inner pipe, the second inner pipe, the third inner pipe and the fourth inner pipe on the left side and the right side. The boarding ladder can be smoothly unfolded and used conveniently, and similarly, when the boarding ladder is not used, the boarding ladder can be contracted, and the boarding ladder can be directly stored and placed in a storage cabinet conveniently.

Description

A folding structure for a rapid emergency boarding ladder on a high-speed train. Technical Field

[0001] This utility model belongs to the field of emergency boarding ladder technology, and in particular relates to a folding structure of a fast emergency boarding ladder for high-speed trains. Background Technology

[0002] As the CRH5A high-speed train has been in service for an extended period, pantograph malfunctions have occurred multiple times during operation. Following these malfunctions, it is necessary to climb the pantograph to secure it and remove any foreign objects. However, the CRH5A train lacks a ladder at the end of the train for climbing, making it impossible to perform these tasks promptly after the train stops en route, severely disrupting the train's operational order. Therefore, ensuring timely climbing of the pantograph after a stop during CRH5A operation is of paramount importance.

[0003] Prior to the sixth major speed increase of high-speed trains, the infrastructure and main equipment of the high-speed train depot were in place, basically meeting the operational requirements for high-speed train maintenance. However, due to the small track spacing on track D2 of the depot's inspection area, it was impossible to add a maintenance work platform; only lifting platforms were installed at both ends of the track. Retrieving parts and tools required using these lifting platforms, significantly impacting the efficiency of maintenance work. Therefore, there was an urgent need to overcome these shortcomings and provide a folding structure for a rapid emergency boarding ladder for high-speed trains. Summary of the Invention

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by providing a reasonably designed, simple, and foldable rapid emergency boarding ladder for high-speed trains, thereby solving the problems existing in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A folding structure for a rapid emergency boarding ladder for high-speed trains includes an outer tube. Support blocks are hinged to the bottom ends of both outer tubes. A reinforcing rod and a first foot pedal are fixed between the two outer tubes. Two reinforcing rods are present. A multi-link assembly is installed behind the first foot pedal. Positioning components are installed on opposite sides of the tops of the two outer tubes. A first inner tube, a second inner tube, a third inner tube, a fourth inner tube, and a fifth inner tube are sequentially slidably installed on the inner side of the outer tubes. A second foot pedal is fixedly connected between the top ends of the two fifth inner tubes on the left and right sides. A third foot pedal is fixed between the top ends of the two first inner tubes, the second inner tube, the third inner tube, and the fourth inner tube on the left and right sides.

[0007] In a preferred embodiment, an anti-slip pad is adhered to the bottom surface of the support block, and the anti-slip pad is made of elastic rubber.

[0008] In a preferred embodiment, the positioning assembly includes a mounting box, a spring, a positioning block, a pull rod, and a pull ring. The positioning block is elastically connected to the inner side of the mounting box via the spring. A pull rod is fixedly installed at the middle of the end of the positioning block away from the outer tube. One end of the pull rod passes through the mounting box and is slidably connected to it. A pull ring is fixedly connected to the end of the pull rod away from the positioning block.

[0009] In a preferred embodiment, the mounting box is embedded and fixedly installed on the top outer wall of the outer tube. Positioning grooves are provided on both the upper and lower ends of the first inner tube near the mounting box, and the positioning block engages with the first inner tube through the positioning grooves.

[0010] In one preferred embodiment, the first inner tube, the second inner tube, the third inner tube, the fourth inner tube, and the fifth inner tube form a linkage mechanism through a multi-link assembly.

[0011] In a preferred embodiment, the multi-link assembly includes two first links and a plurality of second links. The two first links are respectively hinged to the rear outer surfaces of the first pedal and the second pedal, and the plurality of second links correspond one-to-one with and are hinged to the plurality of third pedals.

[0012] In a preferred embodiment, the length of the first link is equal to half the length of the second link, and the first link and the second link, as well as the ends of two adjacent second links, are hinged.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] In the solution of this utility model:

[0015] When the device pushes the first inner tube to rise vertically along the outer tube, the first and second links in the multi-link assembly rotate and push, which facilitates the simultaneous upward sliding extension of the first, second, third, fourth, and fifth inner tubes, making it easy to deploy and use the boarding ladder smoothly. Similarly, when not in use, the boarding ladder can be retracted. After retraction, the boarding ladder is small in size and can be directly stored in a storage cabinet, making it convenient and easy to use, and convenient for emergency handling.

[0016] Two positioning slots are provided on the outer wall of the first inner tube. When the boarding ladder is extended for use or stored, the positioning blocks can be stably inserted into the corresponding positioning slots by the support of the springs, so as to lock the use status of the boarding ladder and facilitate the stable extension or storage of the boarding ladder. Attached Figure Description

[0017] 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. The drawings are described as follows:

[0018] Figure 1 is a three-dimensional front view of the structure of this utility model;

[0019] Figure 2 is a schematic diagram of the three-dimensional rear view cross-sectional structure of this utility model;

[0020] Figure 3 is an enlarged structural schematic diagram of point A in Figure 2 of this utility model;

[0021] Figure 4 is a top view cross-sectional structural diagram of the positioning block and the first inner tube of this utility model;

[0022] Figure 5 is a front view of the structure of the first inner tube and the positioning groove of this utility model;

[0023] Figure 6 is a schematic diagram of the working state of this utility model.

[0024] In the picture:

[0025] 1. Outer tube; 2. Support block; 3. Anti-slip pad; 4. Reinforcing rod; 5. Positioning assembly; 51. Mounting box; 52. Spring; 53. Positioning block; 54. Pull rod; 55. Pull ring; 6. First foot pedal; 7. Multi-link assembly; 71. First link; 72. Second link; 8. First inner tube; 9. Positioning groove; 10. Second inner tube; 11. Third inner tube; 12. Fourth inner tube; 13. Fifth inner tube; 14. Second foot pedal; 15. Third foot pedal. Detailed Implementation

[0026] The embodiments described below are merely some embodiments of the present invention and do not represent all embodiments consistent with the present invention. Exemplary embodiments will now be described with reference to the accompanying drawings:

[0027] As shown in Figures 1-6, the folding structure of the high-speed train rapid emergency boarding ladder of this utility model includes an outer tube 1. Support blocks 2 are hinged to the bottom ends of the two outer tubes 1. Reinforcing rods 4 and first foot pedals 6 are fixed between the two outer tubes 1. There are two reinforcing rods 4. A multi-link assembly 7 is installed behind the first foot pedal 6. Positioning components 5 are installed on the opposite sides of the top of the two outer tubes 1. A first inner tube 8, a second inner tube 10, a third inner tube 11, a fourth inner tube 12 and a fifth inner tube 13 are slidably installed on the inner side of the outer tube 1. A second foot pedal 14 is fixedly connected between the top ends of the two fifth inner tubes 13 on the left and right. A third foot pedal 15 is fixed between the top ends of the two first inner tubes 8, the second inner tube 10, the third inner tube 11 and the fourth inner tube 12 on the left and right.

[0028] Based on the above structure, an anti-slip pad 3 is bonded to the bottom surface of the support block 2. The anti-slip pad 3 is made of elastic rubber.

[0029] In this embodiment, the support block 2 and the anti-slip pad 3 are used to enhance the stability of the boarding ladder during use, and the reinforcing rod 4 between the two outer tubes 1 is also used to assist the staff in holding on.

[0030] Based on the above structure, the positioning component 5 includes a mounting box 51, a spring 52, a positioning block 53, a pull rod 54, and a pull ring 55. The positioning block 53 is elastically connected to the inner side of the mounting box 51 by the spring 52. The pull rod 54 is fixedly installed in the middle of the end of the positioning block 53 away from the outer tube 1. One end of the pull rod 54 passes through the mounting box 51 and is slidably connected to it. The pull ring 55 is fixedly connected to the end of the pull rod 54 away from the positioning block 53.

[0031] In this embodiment, the pull ring 55 and the pull rod 54 are used to facilitate the control of the positioning block 53 to slide and retract within the mounting box 51.

[0032] Based on the above structure, the mounting box 51 is embedded and fixedly installed on the top outer wall of the outer tube 1. The upper and lower ends of the first inner tube 8 are provided with positioning grooves 9 on the side near the mounting box 51. The positioning block 53 is engaged with the first inner tube 8 through the positioning grooves 9.

[0033] In this embodiment, the positioning block 53 engages with the first inner tube 8 through the positioning groove 9, thereby facilitating the locking of the boarding ladder's usage status and ensuring its stable deployment or storage.

[0034] Based on the above structure, the first inner tube 8, the second inner tube 10, the third inner tube 11, the fourth inner tube 12 and the fifth inner tube 13 form a linkage mechanism through the multi-link assembly 7.

[0035] In this embodiment, the multi-link assembly 7 facilitates the synchronous unfolding or retraction of the first inner tube 8, the second inner tube 10, the third inner tube 11, the fourth inner tube 12, and the fifth inner tube 13, making it convenient for use or folding and storing the boarding ladder.

[0036] Based on the above structure, the multi-link assembly 7 includes two first links 71 and multiple second links 72. The two first links 71 are respectively hinged to the rear outer surfaces of the first foot pedal 6 and the second foot pedal 14. The multiple second links 72 correspond one-to-one with and are hinged to multiple third foot pedals 15.

[0037] Based on the above structure, the length of the first link 71 is equal to half the length of the second link 72, and the first link 71 and the second link 72, as well as the ends of two adjacent second links 72, are hinged.

[0038] In this embodiment, when the first inner tube 8 is pushed to rise vertically along the outer tube 1, the first connecting rod 71 and the second connecting rod 72 are rotated to facilitate the simultaneous upward sliding extension of the first inner tube 8, the second inner tube 10, the third inner tube 11, the fourth inner tube 12 and the fifth inner tube 13, which facilitates the smooth unfolding and use of the boarding ladder. Similarly, it facilitates the retraction of the boarding ladder to reduce its volume and make it easier to store.

[0039] The working principle of this utility model is as follows:

[0040] In use, first manually pull the lever 54 through the pull ring 55 to control the positioning block 53 to slide and retract within the mounting box 51. After the positioning block 53 disengages from the positioning groove 9, push the bottom third foot pedal 15 to control the first inner tube 8 to slide vertically upward along the outer tube 1. At this time, the first link 71 and the second link 72 in the multi-link assembly 7 are rotated to facilitate the simultaneous upward sliding extension of the first inner tube 8, the second inner tube 10, the third inner tube 11, the fourth inner tube 12, and the fifth inner tube 13, making it easy for the boarding ladder to unfold and be used smoothly as shown in Figure 6. The positioning block 53 can be ejected by the spring 52 and engaged with another positioning groove 9 to ensure the stability of the working state of this emergency boarding ladder.

[0041] When in use, the support block 2 hinged at the bottom of the outer tube 1 and the anti-slip pad 3 glued to the bottom of the support block 2 are used to improve the stability of the boarding ladder. In addition, the reinforcing rod 4 between the two outer tubes 1 not only improves the stability of the structure, but also makes it easier for other staff to help support the boarding ladder and ensure safety. Similarly, when the boarding ladder is not in use, it can be retracted. After retraction, the boarding ladder is small in size and can be directly stored in the storage cabinet for easy use in emergency situations.

[0042] Two positioning slots 9 are provided on the outer wall of the first inner tube 8. When the boarding ladder is extended for use or stored, the positioning block 53 can be stably inserted into the positioning slot 9 by the support of the spring 52, thereby facilitating the stable extension or storage of the boarding ladder.

[0043] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any equivalent changes, modifications, substitutions, and variations made by those skilled in the art based on the concept of this utility model and on the basis of existing technology through logical analysis, reasoning, or limited experiments shall be within the scope of protection defined by the claims.

Claims

1. A folding structure for a rapid emergency boarding ladder on a high-speed train, comprising an outer tube (1), characterized in that: Support blocks (2) are hinged to the bottom ends of the two outer tubes (1). A reinforcing rod (4) and a first foot pedal (6) are fixed between the two outer tubes (1). There are two reinforcing rods (4). A multi-link assembly (7) is installed behind the first foot pedal (6). A positioning assembly (5) is installed on the opposite side of the top of the two outer tubes (1). A first inner tube (8), a second inner tube (10), a third inner tube (11), a fourth inner tube (12), and a fifth inner tube (13) are slidably installed on the inner side of the outer tubes (1). A second foot pedal (14) is fixedly connected between the top ends of the two fifth inner tubes (13). A third foot pedal (15) is fixed between the top ends of the two first inner tubes (8), the second inner tube (10), the third inner tube (11), and the fourth inner tube (12).

2. The folding structure of a rapid emergency boarding ladder for high-speed trains according to claim 1, characterized in that: The bottom surface of the support block (2) is bonded with an anti-slip pad (3), which is made of elastic rubber.

3. The folding structure of a rapid emergency boarding ladder for high-speed trains according to claim 1, characterized in that: The positioning component (5) includes a mounting box (51), a spring (52), a positioning block (53), a pull rod (54), and a pull ring (55). The positioning block (53) is elastically connected to the inner side of the mounting box (51) by the spring (52). The pull rod (54) is fixedly installed in the middle of the end of the positioning block (53) away from the outer tube (1). One end of the pull rod (54) passes through the mounting box (51) and is slidably connected to it. The pull ring (55) is fixedly connected to the end of the pull rod (54) away from the positioning block (53).

4. The folding structure of a rapid emergency boarding ladder for high-speed trains according to claim 3, characterized in that: The mounting box (51) is embedded and fixedly installed on the top outer wall of the outer tube (1). The first inner tube (8) has positioning grooves (9) on both the upper and lower ends near the mounting box (51). The positioning block (53) engages with the first inner tube (8) through the positioning grooves (9).

5. The folding structure of a rapid emergency boarding ladder for high-speed trains according to claim 1, characterized in that: The first inner tube (8), the second inner tube (10), the third inner tube (11), the fourth inner tube (12) and the fifth inner tube (13) form a linkage mechanism through a multi-link assembly (7).

6. The folding structure of a rapid emergency boarding ladder for high-speed trains according to claim 5, characterized in that: The multi-link assembly (7) includes two first links (71) and multiple second links (72). The two first links (71) are respectively hinged to the rear outer surfaces of the first pedal (6) and the second pedal (14). The multiple second links (72) correspond one-to-one with the multiple third pedals (15) and are hinged to each other.

7. The folding structure of a rapid emergency boarding ladder for high-speed trains according to claim 6, characterized in that: The length of the first link (71) is equal to half the length of the second link (72), and the first link (71) and the second link (72) are hinged together as are the ends of two adjacent second links (72).

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