Wide range of passenger car telescopic structure ladder body

Abstract

The present application relates to the field of airport ground equipment, in particular to a wide range of passenger elevator car telescopic structure ladder body, including fixed ladder, telescopic ladder and ladder telescopic oil cylinder, also including telescopic assembly; telescopic assembly includes telescopic tail ladder, pedal mounting bracket, bottom support and elastic member, pedal mounting bracket is slidably connected with telescopic ladder through elastic member, bottom support is fixedly connected with fixed ladder, telescopic tail ladder is fixedly connected with pedal mounting bracket, when telescopic ladder is lowered to the lowest, telescopic ladder drives pedal mounting bracket to abut against bottom support, at this time, pedal mounting bracket and telescopic tail ladder are limited and lifted by bottom support, steps of telescopic tail ladder are compressed and close to the fixed step below the lowest step of telescopic ladder, at this time, elastic member is stretched and stored energy, when telescopic ladder is pushed out by ladder telescopic oil cylinder and linear displacement is generated with fixed ladder, telescopic tail ladder is pushed out by gravity and elastic member until the limiting position, reaches the same height difference and depth position as other fixed steps.

Description

Technical Field

[0001] The invention relates to the field of airport ground equipment, in particular to a telescopic ladder body of a wide-range passenger elevator. Background Art

[0002] The domestic regional aircraft market is experiencing increasing demand for wide-range, low-height passenger ladders. These vehicles can cover the operating height range of both elevated and standard-height passenger ladders, accommodating a wider range of aircraft types. Limited by the size of the upper and lower steps and the platform angle (-3° to +3°), achieving a minimum height below 2200mm for two-step retractable passenger ladders with a maximum height of 5.8 meters is difficult. Most two-step retractable passenger ladders (5.8-meter specification) in the industry range from 2400 to 5800mm, failing to achieve this minimum height.

[0003] The current solution uses an intermediate ladder, connected to the fixed ladder by a pulley guide. When the telescopic ladder is lowered to its lowest point, it is flush with the top step of the fixed ladder, meeting the minimum height. The intermediate ladder is also flush with the top step of the telescopic and fixed ladders. When the telescopic ladder is fully extended to a height of 5.8 meters, the intermediate ladder is unpowered and pulled out by the movable ladder to fill the gap left by the extended travel of the telescopic ladder, bringing the bottom step of the intermediate ladder flush with the top step of the fixed ladder.

[0004] This solution has a more complex structure: three sets of ladder step assemblies need to be designed, and the coordination and safety protection design are more complicated; the middle ladder is pulled out by the telescopic ladder without power, and is arranged on the inside of the fixed ladder and relies on fixed tracks to retract linearly, which requires high processing and assembly requirements; because the floating middle ladder is set in the gap between the fixed ladder and the movable ladder, it is necessary to meet the requirements of leveling and adjusting the gaps of all the steps of the two ladders (telescopic ladder and fixed ladder) and the middle ladder, which makes debugging difficult. Summary of the Invention

[0005] The purpose of the present invention is to provide a wide range of telescopic ladder structure for passenger elevators, which solves the problem that existing passenger elevators are complex in structure and difficult to debug because the intermediate ladder is set to fill the gap left by the telescopic ladder's excessive travel.

[0006] To achieve the above-mentioned objectives, the present invention provides a wide-range passenger ladder vehicle telescopic structure ladder body, including a fixed ladder, a telescopic ladder and a ladder telescopic oil cylinder, the telescopic ladder is slidably installed on the fixed ladder, the ladder telescopic oil cylinder is installed on the fixed ladder, the output end of the ladder telescopic oil cylinder is connected to the telescopic ladder, and also includes a telescopic assembly; the telescopic assembly includes a telescopic tail ladder, a pedal mounting frame, a bottom support and an elastic member, the elastic member is arranged on the telescopic ladder, the pedal mounting frame is slidably connected to the telescopic ladder through the elastic member, the bottom support is fixedly connected to the fixed ladder and is arranged on the fixed ladder, the telescopic tail ladder is fixedly connected to the pedal mounting frame and is arranged on the pedal mounting frame.

[0007] Wherein, the base includes a seat body and a first shock-absorbing seat, the seat body is fixedly connected to the fixed ladder and is arranged on the fixed ladder; the first shock-absorbing seat is fixedly connected to the seat body and is located on a side of the seat body close to the pedal mounting frame.

[0008] In which, the elastic component includes a telescopic cylinder, a telescopic tube, a tail ladder extension spring and a tension spring seat, the telescopic cylinder is fixedly connected to the telescopic ladder and is arranged on the telescopic ladder; the telescopic tube is slidably connected to the telescopic cylinder, and is fixedly connected to the pedal mounting frame, and is arranged on the telescopic cylinder; the tension spring seat is fixedly connected to the pedal mounting frame and is located on one side of the pedal mounting frame; one end of the tail ladder extension spring is connected to the tension spring seat, and the other end of the tail ladder extension spring is connected to the telescopic tube.

[0009] Wherein, the telescopic assembly further includes a baffle, which is rotatably connected to the telescopic ladder and is arranged on the telescopic ladder.

[0010] In which, the telescopic assembly also includes a limiting component, which includes a limiting seat and a force transmission rod. The limiting seat is rotatably connected to the pedal mounting frame and is located on one side of the pedal mounting frame; one end of the force transmission rod is rotatably connected to the limiting seat, and the other end of the force transmission rod is connected to the tension spring seat, and the force transmission rod is arranged on the limiting seat.

[0011] Wherein, the limiting component further includes a reset spring, one end of the reset spring is connected to the pedal mounting bracket, the other end of the reset spring is connected to the limiting seat, and the reset spring is arranged on the limiting seat.

[0012] Among them, the telescopic structure ladder body of the wide-range passenger elevator car also includes a flip cylinder and a flip tail ladder. The flip tail ladder is rotatably connected to the fixed ladder and is arranged on the fixed ladder; the flip cylinder is connected to the fixed ladder and is arranged on the fixed ladder, and the output end of the flip cylinder is rotatably connected to the flip tail ladder.

[0013] The present invention provides a telescopic ladder body for a wide-range passenger ladder. When the telescopic ladder is lowered to the lowest position, the telescopic ladder drives the step mounting frame to abut against the base support. At this time, the step mounting frame and the telescopic tail ladder are limited and lifted by the base support. The steps of the telescopic tail ladder are compressed and pressed against the bottom fixed step of the telescopic ladder. At this time, the elastic member is stretched and stores energy. When the telescopic ladder is pushed out by the ladder telescopic oil cylinder and generates a linear displacement with the fixed ladder, the telescopic tail ladder is pushed out by gravity and the elastic member until it reaches the limited position, reaching the same height difference and depth position as the other fixed steps. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art.

[0015] Figure 1 It is a schematic diagram of the overall structure of the telescopic structure ladder body of the wide-range passenger elevator car according to the first embodiment of the present invention.

[0016] Figure 2 It is a schematic diagram of the installation structure of the telescopic ladder according to the first embodiment of the present invention.

[0017] Figure 3 It is a structural diagram of the telescopic assembly of the first embodiment of the present invention.

[0018] Figure 4 The first embodiment of the present invention Figure 3 Enlarged view of point A.

[0019] Figure 5 It is a schematic diagram of the installation structure of the stepped telescopic oil cylinder according to the second embodiment of the present invention.

[0020] Figure 6 The second embodiment of the present invention Figure 5 Enlarged view of point C.

[0021] Figure 7 2 is a schematic diagram of the installation structure of a telescopic ladder according to the second embodiment of the present invention.

[0022] Figure 8 The second embodiment of the present invention Figure 7 Enlarged view of point D.

[0023] Figure 9 It is a schematic diagram of the installation structure of the tilting cylinder according to the third embodiment of the present invention.

[0024] In the figure: 101-fixed ladder, 102-telescopic ladder, 103-ladder telescopic cylinder, 104-telescopic assembly, 105-telescopic tail ladder, 106-pedal mounting frame, 107-bottom support, 108-elastic member, 109-seat body, 110-first shock-absorbing seat, 111-telescopic cylinder, 112-telescopic tube, 113-tail ladder extension spring, 114-tension spring seat, 201-baffle, 202-limiting member, 203-limiting seat, 204-force transmission rod, 205-rod body, 206-limiting bolt, 207-reset spring, 208-second shock-absorbing seat, 301-flipping cylinder, 302-flipping tail ladder. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0026] First embodiment:

[0027] See also Figures 1 to 4 ,in Figure 1 This is the overall structural diagram of the telescopic ladder body of the wide range passenger elevator. Figure 2 This is a schematic diagram of the installation structure of a telescopic ladder. Figure 3 It is a structural diagram of the telescopic component. Figure 4 yes Figure 3 Enlarged view of point A.

[0028] The present invention provides a wide-range passenger ladder with a telescopic structure, comprising a fixed ladder 101, a telescopic ladder 102, a ladder telescopic oil cylinder 103, and a telescopic assembly 104. The telescopic assembly 104 comprises a telescopic tail ladder 105, a pedal mounting frame 106, a bottom bracket 107, and an elastic member 108. The bottom bracket 107 comprises a seat body 109 and a first shock-absorbing seat 110. The elastic member 108 comprises a telescopic cylinder 111, a telescopic tube 112, a tail ladder extension spring 113, and a tension spring seat 114. The elastic member 108 enables the telescopic tail ladder 105 to slide on the telescopic ladder 102. When the telescopic ladder 102 is lowered to the lowest point, the pedal mounting frame 106 abuts against the bottom bracket. 107, thereby causing the elastic member 108 to be stretched. At this time, the telescopic tail ladder 105 is compressed and closely adjacent to the bottom fixed step of the telescopic ladder 102. When the telescopic ladder 102 is pushed out, the telescopic tail ladder 105 is pulled out for use. In other states, it only moves at the bottom of the fixed ladder 101 step. This method meets the wide range and low height requirements of the entire vehicle. It can be understood that the above-mentioned solution can be used to solve the problem that the existing passenger ladder vehicle uses an intermediate ladder to fill the gap left by the long travel of the telescopic ladder, which has a relatively complex structure and is difficult to debug. It can also be used to solve the problem of preventing passengers' feet from extending into the gap between the telescopic tail ladder 105 and the steps of the telescopic ladder 102.

[0029] According to this specific embodiment, the telescopic ladder 102 is slidably mounted on the fixed ladder 101, the ladder telescopic oil cylinder 103 is mounted on the fixed ladder 101, the output end of the ladder telescopic oil cylinder 103 is connected to the telescopic ladder 102, the fixed ladder 101 and the telescopic ladder 102 are made of the internal angle steel of the channel steel and the slide groove at the bottom to make the guide rail, and the roller clamping limit is set in the front and rear positions and the upper and lower directions of the telescopic ladder 102 to ensure that the telescopic ladder 102 can only move in a straight line. 103 drives the telescopic ladder 102 to move, thereby realizing the lifting and lowering of the telescopic ladder 102. The number of steps of the fixed ladder 101 is reduced. When the telescopic ladder 102 is lowered to the lowest position and the uppermost steps of the two ladders are flush, it is the lowest height of the ladder body. The number of steps of the telescopic ladder 102 is increased, and the entire telescopic stroke is increased. When the telescopic ladder 102 is raised to the highest position, the platform reaches the highest height. The fixed ladder 101 is rotatably installed on the passenger ladder car and can be rotated on the passenger ladder car through a hydraulic structure arranged at the bottom of the fixed ladder 101.

[0030] Among them, the elastic member 108 is arranged on the telescopic ladder 102, the pedal mounting frame 106 is slidably connected to the telescopic ladder 102 through the elastic member 108, the bottom bracket 107 is fixedly connected to the fixed ladder 101 and is arranged on the fixed ladder 101, the telescopic tail ladder 105 is fixedly connected to the pedal mounting frame 106 and is arranged on the pedal mounting frame 106, the telescopic tail ladder 105 is arranged at the lower part of the lowest fixed step of the telescopic ladder 102, the elastic member 108 is elastic and can be retracted, the pedal There are two mounting frames 106, which support the telescopic tail ladder 105 through the two pedal mounting frames 106. There are two bottom brackets 107, which correspond to the two pedal mounting frames 106 respectively. When the telescopic ladder 102 is lowered to the lowest point, the telescopic ladder 102 drives the pedal mounting frame 106 to abut against the bottom bracket 107. At this time, the pedal mounting frame 106 and the telescopic tail ladder 105 are limited and lifted by the bottom bracket 107, and the steps of the telescopic tail ladder 105 are compressed and pressed against the bottom fixed step of the telescopic ladder 102. The elastic member 108 is stretched and stores energy. When the telescopic ladder 102 is pushed out by the ladder telescopic oil cylinder 103 and produces a linear displacement with the fixed ladder 101, the telescopic tail ladder 105 is pushed out by gravity and the elastic member 108 until it reaches the limit position, reaching the same height difference and depth position as other fixed steps. The present invention adopts a new design structure: the fixed ladder 101 reduces the number of steps to make the platform reach a minimum height of less than 2200mm, the travel of the telescopic ladder 102 is increased, and it can reach a maximum working height of 5.8 meters. The travel of the telescopic ladder 102 is lengthened This results in a lengthened beam structure, and while the steps of the upper platform remain flat, the space utilization at the bottom of the ladder body and the bottom of the rear overhang is increased. At the same time, the telescopic tail ladder 105 is designed so that the telescopic tail ladder 105 is automatically retracted during driving (the telescopic ladder 102 is lowered to the lowest point), and is automatically extended during operation (the telescopic ladder 102 is extended) under the influence of gravity and the action of the elastic member 108. Only when the ladder body is raised to the highest height is the telescopic tail ladder 105 pulled out for use. In other states, it only moves at the bottom of the steps of the fixed ladder 101. This method meets the requirements of a wide range and low height of the entire vehicle.

[0031] Secondly, the seat body 109 is fixedly connected to the fixed ladder 101 and is arranged on the fixed ladder 101; the first shock-absorbing seat 110 is fixedly connected to the seat body 109 and is located on the side of the seat body 109 close to the pedal mounting frame 106. Through the first shock-absorbing seat 110, the pedal mounting frame 106 is buffered when colliding with the base 107, thereby avoiding damage to the base 107 or the pedal mounting frame 106.

[0032] At the same time, the telescopic cylinder 111 is fixedly connected to the telescopic ladder 102 and is provided on the telescopic ladder 102; the telescopic tube 112 is slidably connected to the telescopic cylinder 111 and is fixedly connected to the pedal mounting frame 106 and is provided on the telescopic cylinder 111; the tension spring seat 114 is fixedly connected to the pedal mounting frame 106 and is located on one side of the pedal mounting frame 106; one end of the tail ladder extension spring 113 is connected to the tension spring seat 114, and the other end of the tail ladder extension spring 113 is connected to the telescopic tube 112, and the tail ladder extension spring 113 is elastic and can be extended and retracted, and when the telescopic ladder 102 is lowered, it drives the pedal mounting frame 106 to move. , so that the pedal mounting frame 106 abuts against the bottom support 107. At this time, the pedal mounting frame 106 and the telescopic tail ladder 105 stop moving, and the telescopic ladder 102 continues to descend, so that the lowermost step on it can be close to the telescopic tail ladder 105, and the telescopic ladder 102 continues to drive the telescopic cylinder 111 and the tension spring seat 114 to move, so that the tension spring seat 114 stretches the tail ladder extension spring 113. When the telescopic ladder 102 is pushed out, the tail ladder extension spring 113 pulls the telescopic tube 112, the pedal mounting frame 106 and the telescopic tail ladder 105 to reset, so that the telescopic tail ladder 105 is pushed out and is level with the uppermost step of the fixed ladder 101.

[0033] When the telescopic ladder 102 is lowered, the step mounting bracket 106 is driven to abut against the bottom bracket 107. After the step mounting bracket 106 abuts against the bottom bracket 107, the telescopic ladder 102 continues to lower, causing the telescopic tube 112 and the tension spring seat 114 to move relative to the telescopic cylinder 111, thereby stretching the tension spring. When the telescopic ladder 102 is about to reach the lowest point, the lowest step of the telescopic ladder 102 is close to the telescopic tail ladder 105, so that the platform reaches the lowest height of 2200mm. When the telescopic ladder 102 is pushed out, the tension spring seat 114 and the telescopic tube 112 are reset under the action of the tail ladder extension tension spring 113, thereby driving the step mounting bracket 106 and the telescopic tail ladder 105 to reset, so that the telescopic tail ladder 105 is extended and can be flush with the uppermost step of the fixed ladder 101, achieving the requirement of a wide range and low height of the entire vehicle.

[0034] Second embodiment:

[0035] Based on the first embodiment, please refer to Figures 5 to 8 , Figure 5 This is a schematic diagram of the installation structure of the stepped telescopic oil cylinder of the second embodiment. Figure 6 yes Figure 5 The enlarged image of point C, Figure 7 2 is a schematic diagram of the installation structure of the telescopic ladder of the second embodiment. Figure 8 yes Figure 7 In the enlarged view at point D, the telescopic assembly 104 of this embodiment also includes a baffle 201 and a limiting component 202. The limiting component 202 includes a limiting seat 203, a force transmission rod 204, a reset spring 207 and a second shock-absorbing seat 208. The force transmission rod 204 includes a rod body 205 and a limiting bolt 206.

[0036] According to this specific embodiment, the baffle 201 is rotatably connected to the telescopic ladder 102 and is arranged on the telescopic ladder 102. The baffle 201 is rotatably installed below the lowest step of the telescopic ladder 102 and is located above the telescopic tail ladder 105. When the telescopic ladder 102 is lowered to the lowest point, the telescopic tail ladder 105 is pressed under the lowest step of the telescopic ladder 102. At this time, the baffle 201 is clamped between the lowest step and the telescopic tail ladder 105. When the telescopic ladder 102 is pushed out, the baffle 201 can automatically rotate to a vertical state under the action of gravity. At this time, the lower edge of the baffle 201 is aligned with the upper edge of the telescopic tail ladder 105, thereby blocking the gap between the telescopic tail ladder 105 and the lowest step of the telescopic ladder 102, preventing passengers from putting their feet into this gap and causing danger.

[0037] Among them, the limit seat 203 is rotatably connected to the pedal mounting frame 106 and is located on one side of the pedal mounting frame 106; one end of the force transmission rod 204 is rotatably connected to the limit seat 203, and the other end of the force transmission rod 204 is connected to the tension spring seat 114, and the force transmission rod 204 is arranged on the limit seat 203.

[0038] Secondly, the rod body 205 is rotatably connected to the limiting seat 203 and connected to the tension spring seat 114 , and is disposed on the limiting seat 203 ; the limiting bolt 206 is fixedly connected to the rod body 205 and sleeved on the rod body 205 .

[0039] When the telescopic ladder 102 is pushed out by the step telescopic oil cylinder 103, the telescopic tube 112 moves under the action of the tail ladder extension spring 113, and the movement of the telescopic tube 112 also drives the tension spring seat 114 to move. When the tension spring seat 114 moves to abut against the limiting bolt 206, the movement of the tension spring seat 114 will pull the rod body 205 to move, and then the rod body 205 pulls the limiting seat 203 to rotate, so that the limiting seat 203 abuts against the back of the baffle 201, thereby limiting the baffle 201 and preventing passengers from kicking on the baffle 201 and causing the baffle 201 to rotate.

[0040] At the same time, one end of the return spring 207 is connected to the pedal mounting bracket 106, and the other end of the return spring 207 is connected to the limit seat 203. The return spring 207 is arranged on the limit seat 203. When the limit seat 203 is pulled by the rod body 205 to rotate, the limit seat 203 stretches the return spring 207. At this time, when the telescopic tail ladder 105 is in the extended state, the return spring 207 is in the stretched state. In this way, when the telescopic tail ladder 105 is reset, the limit seat 203 can be reset under the action of the return spring 207, thereby preventing the limit seat 203 from interfering with the descent of the baffle 201 and the telescopic ladder 102.

[0041] At the same time, the second shock-absorbing seat 208 is fixedly connected to the limit seat 203 and is located on the side of the limit seat 203 close to the baffle 201. The second shock-absorbing seat 208 cushions the collision between the baffle 201 and the limit seat 203 to avoid damage to the baffle 201 or the limit seat 203.

[0042] Second embodiment:

[0043] Based on the first embodiment, please refer to Figure 9 , Figure 9 30 is a schematic diagram of the installation structure of the tilting cylinder of the second embodiment. The telescopic structure ladder body of the wide-range passenger elevator vehicle in this embodiment further includes a tilting cylinder 301 and a tilting tail ladder 302.

[0044] According to this specific embodiment, the flip tail ladder 302 is rotatably connected to the fixed ladder 101 and is arranged on the fixed ladder 101; the flip cylinder 301 is connected to the fixed ladder 101 and is arranged on the fixed ladder 101, and the output end of the flip cylinder 301 is rotatably connected to the flip tail ladder 302. When the entire ladder body is in operation, the flip cylinder 301 is started to retract the output end of the flip cylinder 301, thereby driving the flip tail ladder 302 to rotate, thereby lowering the step height for passengers to reach the bottom during operation. When the ladder body is not in operation, the output end of the flip cylinder 301 is extended, thereby storing the flip tail ladder 302 and increasing the driving departure angle.

[0045] The entire ladder structure of this invention is used in the same manner as a conventional two-ladder telescopic structure, driven by the ladder telescopic cylinder 103 to achieve relative linear displacement of the telescopic ladder 102 and the fixed ladder 101, lengthening the ladder structure to accommodate aircraft of varying heights. This new solution reduces the number of additional mechanisms and space requirements, saving material costs and reducing quality control of the intermediate ladder installation clearance during production. Because the telescopic ladder 102 extends to different heights, each step must be aligned with the top step of the fixed ladder 101 to ensure the height difference and clearance between the steps. Therefore, the absence of an intermediate ladder significantly reduces the debugging workload.

[0046] The present invention mainly solves:

[0047] 1) Meet the passenger elevator alignment range of 2200-5800mm;

[0048] 2) The use of an intermediate ladder increases the difficulty of structural design, and the gap between the fixed ladder and the movable ladder also increases the difficulty of assembly and debugging.

[0049] The above disclosure is merely one or more preferred embodiments of the present application and is not intended to limit the scope of the present application. A person skilled in the art will understand that all or part of the processes of the above embodiments and equivalent changes made in accordance with the claims of the present application are still within the scope of the present application.

Claims

1. A telescopic ladder structure for a wide range passenger ladder, comprising a fixed ladder, a telescopic ladder, and a ladder telescopic oil cylinder. The telescopic ladder is slidably mounted on the fixed ladder, the ladder telescopic oil cylinder is mounted on the fixed ladder, and the output end of the ladder telescopic oil cylinder is connected to the telescopic ladder, characterized in that: Also included are telescopic components; The telescopic assembly includes a telescopic tail ladder, a step mounting frame, a bottom bracket, and an elastic member. The elastic member is arranged on the telescopic ladder. The step mounting frame is slidably connected to the telescopic ladder via the elastic member. The bottom bracket is fixedly connected to the fixed ladder and arranged on the fixed ladder. The telescopic tail ladder is fixedly connected to the step mounting frame and arranged on the step mounting frame. The elastic component includes a telescopic cylinder, a telescopic tube, a tail ladder extension spring and a tension spring seat. The telescopic cylinder is fixedly connected to the telescopic ladder and is arranged on the telescopic ladder; the telescopic tube is slidably connected to the telescopic cylinder, fixedly connected to the pedal mounting frame, and is arranged on the telescopic cylinder; the tension spring seat is fixedly connected to the pedal mounting frame and is located on one side of the pedal mounting frame; one end of the tail ladder extension spring is connected to the tension spring seat, and the other end of the tail ladder extension spring is connected to the telescopic tube.

2. The telescopic structure ladder body of a wide range passenger elevator as claimed in claim 1, characterized in that: The base includes a seat body and a first shock-absorbing seat. The seat body is fixedly connected to the fixed ladder and is arranged on the fixed ladder. The first shock-absorbing seat is fixedly connected to the seat body and is located on a side of the seat body close to the pedal mounting frame.

3. The telescopic structure ladder body of a wide range passenger elevator as claimed in claim 1, characterized in that: The telescopic assembly further comprises a baffle, which is rotatably connected to the telescopic ladder and is arranged on the telescopic ladder.

4. The telescopic structure ladder body of a wide range passenger elevator as claimed in claim 3, characterized in that: The telescopic assembly also includes a limiting component, which includes a limiting seat and a force transmission rod. The limiting seat is rotatably connected to the pedal mounting frame and is located on one side of the pedal mounting frame; one end of the force transmission rod is rotatably connected to the limiting seat, and the other end of the force transmission rod is connected to the tension spring seat. The force transmission rod is arranged on the limiting seat.

5. The telescopic structure ladder body of a wide range passenger elevator as claimed in claim 4, characterized in that: The limiting component further includes a return spring, one end of which is connected to the pedal mounting bracket, and the other end of which is connected to the limiting seat, and the return spring is arranged on the limiting seat.

6. The telescopic structure ladder body of a wide range passenger elevator as claimed in claim 1, characterized in that: The telescopic ladder body of the wide-range passenger ladder vehicle also includes a flip oil cylinder and a flip tail ladder. The flip tail ladder is rotatably connected to the fixed ladder and is arranged on the fixed ladder; the flip oil cylinder is connected to the fixed ladder and is arranged on the fixed ladder, and the output end of the flip oil cylinder is rotatably connected to the flip tail ladder.

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