Climbing operation platform for high-altitude operation of bus

Abstract

The utility model discloses a high-altitude operation platform for high-altitude operation of a bus, which relates to the technical field of high-altitude operation platforms, and comprises an operation platform main body, a quadruple worm gear lead screw lifting assembly, a stair assembly, a guardrail assembly and a telescopic assembly, the quadruple worm gear lead screw lifting assembly is used for realizing the lifting operation of an n-shaped lifting frame; and the telescopic assembly is used for blocking a gap between the top platform and the bus. By arranging the quadruple worm gear lead screw lifting assembly, the stair assembly, the guardrail assembly and the telescopic assembly, the height of the equipment platform can be adjusted in a lifting mode according to different vehicle types, the requirement for the vehicle parking distance is not very strict, the vehicle parking distance can be adjusted through the telescopic pedal, and the safety coefficient of vehicle roof operation is greatly improved through the vehicle roof protective fence; the fence can be contracted, the occupied area is reduced, transportation is convenient, the worm gear lead screw lifting assembly has a self-locking function, and high-altitude operation safety is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of climbing work platforms, in particular to a climbing work platform for high-altitude operations on a bus. Background Art

[0002] A bus is a large public transport with a relatively high overall height. When inspecting, disassembling, replacing, and other work on the roof battery and air conditioner of the bus, when work needs to be done on the roof of the bus, the traditional way is to climb to the top of the bus with a ladder, with a safety rope tied around the waist, and the safety rope is connected to an external fixed object (such as the roof of the work shed, the guardrail of the ladder). Although it has certain safety protection, in this operation mode, there is a safety hazard of falling when working on the roof, and the ladder has simple functions and no lifting function, and cannot adapt to buses of different heights. Based on this, a high-altitude work platform for buses is provided. Utility Model Content

[0003] The purpose of the utility model is to provide a high-altitude operation platform for buses in order to solve the problems in the above background.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-altitude work platform for buses, comprising a work platform body consisting of a base, universal wheels, and a hand-cranked jack, wherein the universal wheels are fixedly installed at the four end corners of the bottom of the base, and the hand-cranked jack is fixedly installed on the outside of the four end corners of the base, and the work platform body also includes an H-shaped fixing frame, a connecting column, a U-shaped fixing frame, an N-shaped lifting frame, a transverse connecting frame, and a top platform;

[0005] The H-shaped fixing frame is symmetrically fixed to the two ends of the top of the base, the two connecting columns are symmetrically fixed to the middle of the top of the H-shaped fixing frame, the U-shaped fixing frame is fixed to the top of the two connecting columns, the vertical sliding rod of the n-shaped lifting frame is connected to the inner side of the U-shaped fixing frame and protrudes to the top of the U-shaped fixing frame, the transverse connecting frame and the top platform are fixed in the middle of the two n-shaped lifting frames, and the transverse connecting frame is located below the top platform. The height adjustment of the top platform can be achieved by moving the n-shaped lifting frame up and down to adapt to buses of different heights;

[0006] A quadruple worm gear screw lifting assembly extending to the inner side of the n-type lifting frame is distributed on the top of the base and the H-type fixing frame, and the quadruple worm gear screw lifting assembly is used to realize the lifting operation of the n-type lifting frame;

[0007] A staircase assembly is distributed between the top of the base and an n-shaped lifting frame, and the staircase assembly is used for workers to climb to the top of the top platform;

[0008] Guardrail components are distributed on the outside of the top platform and the staircase components, and the guardrail components are used to protect the periphery of the top platform and the staircase components;

[0009] A telescopic component is arranged between the transverse connecting frame and the top platform, and the telescopic component is used to block the gap between the top platform and the bus.

[0010] As a further solution of the utility model: the four-link worm screw lifting assembly includes a fixed column, a first worm gear reducer, a first hand crank, a first T-type commutator, a transverse linkage rod, a second T-type commutator, a longitudinal linkage rod, and a worm screw lifting machine;

[0011] The fixing column is fixed to the middle of the top of the base, the first worm gear reducer is installed on the top of the fixing column, the first hand crank is fixedly connected to the input shaft of the first worm gear reducer, the first T-type commutator is installed on one side of the first worm gear reducer, and the input shaft of the first T-type commutator is connected to the output shaft of the first worm gear reducer;

[0012] The transverse linkage rods are symmetrically distributed at both ends of the first T-shaped commutator and connected to the two output shafts of the first T-shaped commutator;

[0013] The second T-shaped commutator is installed on the top of the H-shaped fixing frame and is located between the two connecting columns, and the worm screw elevator is symmetrically installed on both sides of the top of the H-shaped fixing frame and is located directly below the vertical portion of the U-shaped fixing frame;

[0014] The other end of the transverse linkage rod is fixedly connected to the input shaft of the second T-type commutator, the longitudinal linkage rod is symmetrically distributed on both sides of the second T-type commutator and connected to the two output shafts of the second T-type commutator, and the longitudinal linkage rod passes through the connecting column and is fixedly connected to the input shaft of the worm gear screw elevator;

[0015] The threaded rod connected to the output shaft of the worm gear screw lift extends through the inside of the n-type lift frame, and the inside of the n-type lift frame is provided with a threaded hole matching the threaded rod;

[0016] The four worm gear screw lifts can be driven to operate synchronously by rotating the first hand crank, so as to realize the synchronous lifting of two N-type lifting frames.

[0017] As a further solution of the utility model: the staircase assembly includes a top fixing frame, a fixing seat, a staircase body, directional moving wheels, and a moving guide rail;

[0018] The top fixing frame is fixed to one end of the outer wall of an n-shaped lifting frame and is located below the transverse connecting frame. The fixing seat is fixed to the bottom of the top fixing frame. The top of the staircase body is rotatably connected to the fixing seat. The staircase body is used for operators to climb to the top platform.

[0019] The movable guide rail is fixedly installed on the top of the base, the movable guide rail is close to another n-shaped lifting frame, the directional movable wheel is rotatably connected to the bottom of the staircase body, and the roller part of the directional movable wheel is rollingly connected to the inner side of the movable guide rail;

[0020] The top fixing frame, the fixing seat, the directional moving wheels and the moving guide rail are used to adjust the angle of the staircase body, thereby adapting to the height change of the top platform.

[0021] As a further solution of the utility model: the guardrail assembly includes a fixed guardrail, a first folding guardrail, a second folding guardrail, and a side guardrail;

[0022] The fixed guardrails are installed on both sides of the staircase body and on one side of the top platform close to the staircase body;

[0023] The top of the n-shaped lifting frame protrudes from two ends of the top platform, and the first folding guardrail is rotatably connected to one side of the n-shaped lifting frame through a hinge and is distributed on a side of the top platform away from the fixed guardrail;

[0024] The second folding guardrail is rotatably connected to one side of the first folding guardrail through a hinge, and the side guardrail is rotatably connected to one side of the two second folding guardrails away from the first folding guardrail through a hinge;

[0025] When the first folding guardrail and the second folding guardrail are folded into a "V" shape, the side guardrail is close to the side of the top platform to reduce daily storage space. When the first folding guardrail and the second folding guardrail are unfolded into an "I" shape, the side guardrail is away from the top platform. At this time, the side guardrail, the first folding guardrail, the second folding guardrail, the N-type lifting frame and the fixed guardrail are used to shield and protect the roof working area.

[0026] As a further solution of the utility model: the telescopic assembly includes a telescopic pedal, a limit slide, a limit slide rail, a first bearing base, a rotating shaft, a spur gear, a rack, a second worm gear reducer, a vertical connecting shaft, a second hand crank, and a second bearing base;

[0027] The telescopic pedal is slidably stored between the transverse connecting frame and the top platform, the limiting slide is symmetrically fixed on both sides of the telescopic pedal, the limiting slide rail is fixed on the top of the transverse connecting frame, and the limiting slide is slidably connected to the limiting slide rail;

[0028] The first bearing base is installed at the bottom of the limiting slide rail, the rotating shaft is rotatably connected to the first bearing base and passes through both ends of the first bearing base, the spur gear is fixed to the outside of the rotating shaft, the rack is fixed to the bottom of the telescopic pedal, the spur gear is meshed with the rack, and when the rotating shaft rotates, the rack is driven by the spur gear to move horizontally, so as to realize the horizontal movement operation of the telescopic pedal;

[0029] The second worm gear reducer is distributed on the outer end of the transverse connecting frame and the top platform, one end of the rotating shaft passes through the outer side of the transverse connecting frame and is connected to the output shaft of the second worm gear reducer, the vertical connecting shaft is fixedly connected to the top of the input shaft of the second worm gear reducer, the top of the vertical connecting shaft protrudes above the top of the n-shaped lifting frame and is fixedly connected to the second hand crank;

[0030] A second bearing base is fixedly mounted on the outer end surface of the n-type lifting frame, and the vertical connecting shaft passes through the upper and lower ends of the second bearing base. The second bearing base is used to provide support for the rotation of the vertical connecting shaft.

[0031] As a further solution of the utility model: a spring lock and a fixed hook are respectively installed on the top of the first folding guardrail and the second folding guardrail. When the first folding guardrail and the second folding guardrail are folded, the folded state of the first folding guardrail and the second folding guardrail is fixed by the connection between the spring lock and the fixed hook.

[0032] Compared with the prior art, the beneficial effects of the utility model are:

[0033] By setting up a four-unit worm gear lifting assembly, stair assembly, guardrail assembly and telescopic assembly, the height of the equipment platform can be raised and lowered according to different vehicle models. The vehicle parking distance requirement does not need to be very strict and can be adjusted by the telescopic pedal. The roof protection fence greatly improves the safety factor of roof operations. The fence can be retracted to reduce the floor space and facilitate transportation. The worm gear lifting assembly has a self-locking function to ensure the safety of high-altitude operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the structure of the utility model;

[0035] Figure 2 It is a structural schematic diagram of another viewing angle of the utility model;

[0036] Figure 3 For the utility model Figure 2 A magnified view of the position A in the middle;

[0037] Figure 4 This is a structural distribution diagram of the telescopic component of the utility model.

[0038] In the figure: 1. Workbench body; 101. Base; 102. Universal wheel; 103. Hand jack; 104. H-type fixing frame; 105. Connecting column; 106. U-type fixing frame; 107. N-type lifting frame; 108. Horizontal connecting frame; 109. Top platform; 2. Four-link worm gear screw lifting assembly; 201. Fixing column; 202. First worm gear reducer; 203. First hand crank; 204. First T-type commutator; 205. Horizontal linkage rod; 206. Second T-type commutator; 207. Longitudinal link rod; 208. Worm gear screw lifting machine; 3. Staircase assembly; 301 , top fixed frame; 302, fixed seat; 303, stair body; 304, directional moving wheel; 305, moving guide rail; 4, guardrail assembly; 401, fixed guardrail; 402, first folding guardrail; 403, second folding guardrail; 404, side guardrail; 5, telescopic assembly; 501, telescopic pedal; 502, limit slide; 503, limit slide rail; 504, first bearing base; 505, rotating shaft; 506, spur gear; 507, rack; 508, second worm gear reducer; 509, vertical connecting shaft; 510. Second hand crank; 511, second bearing base. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] See also Figures 1 to 4 In the embodiment of the utility model, a high-altitude work platform for a bus includes a work platform body 1 composed of a base 101, universal wheels 102, and a hand jack 103. The universal wheels 102 are fixedly installed at the four end corners of the bottom of the base 101, and the hand jack 103 is fixed to the outside of the four end corners of the base 101. The work platform body 1 also includes an H-shaped fixing frame 104, a connecting column 105, a U-shaped fixing frame 106, an n-shaped lifting frame 107, a horizontal connecting frame 108, and a top platform 109.

[0041] The H-shaped fixing frame 104 is symmetrically fixed to the two ends of the top of the base 101, the two connecting columns 105 are symmetrically fixed to the middle of the top of the H-shaped fixing frame 104, the U-shaped fixing frame 106 is fixed to the top of the two connecting columns 105, the vertical sliding rod of the n-shaped lifting frame 107 is connected to the inner side of the U-shaped fixing frame 106 and protrudes to the top of the U-shaped fixing frame 106, the transverse connecting frame 108 and the top platform 109 are fixed in the middle of the two n-shaped lifting frames 107, and the transverse connecting frame 108 is located below the top platform 109. The height of the top platform 109 can be adjusted by moving the n-shaped lifting frame 107 up and down to adapt to buses of different heights;

[0042] A quadruple worm screw lifting assembly 2 extending to the inside of the n-type lifting frame 107 is distributed on the top of the base 101 and the H-type fixing frame 104, and the quadruple worm screw lifting assembly 2 is used to realize the lifting operation of the n-type lifting frame 107; a staircase assembly 3 is distributed between the top of the base 101 and an n-type lifting frame 107, and the staircase assembly 3 is used for operators to climb to the top of the top platform 109; a guardrail assembly 4 is distributed on the outside of the top platform 109 and the staircase assembly 3, and the guardrail assembly 4 is used to protect the periphery of the top platform 109 and the staircase assembly 3; a telescopic assembly 5 is provided between the transverse connecting frame 108 and the top platform 109, and the telescopic assembly 5 is used to block the gap between the top platform 109 and the bus;

[0043] The quadruple worm gear screw lifting assembly 2 includes a fixed column 201, a first worm gear reducer 202, a first hand crank 203, a first T-shaped commutator 204, a transverse linkage rod 205, a second T-shaped commutator 206, a longitudinal linkage rod 207, and a worm gear screw lifting machine 208;

[0044] The fixing column 201 is fixed to the middle of the top of the base 101, the first worm gear reducer 202 is installed on the top of the fixing column 201, the first hand crank 203 is fixedly connected to the input shaft of the first worm gear reducer 202, the first T-type commutator 204 is installed on one side of the first worm gear reducer 202, and the input shaft of the first T-type commutator 204 is connected to the output shaft of the first worm gear reducer 202;

[0045] The transverse linkage rod 205 is symmetrically distributed at both ends of the first T-shaped commutator 204 and connected to the two output shafts of the first T-shaped commutator 204; the second T-shaped commutator 206 is installed on the top of the H-shaped fixing frame 104 and is located between the two connecting columns 105, and the worm screw elevator 208 is symmetrically installed on both sides of the top of the H-shaped fixing frame 104 and is located directly below the vertical part of the U-shaped fixing frame 106; the other end of the transverse linkage rod 205 is fixedly connected to the input shaft of the second T-shaped commutator 206, and the longitudinal linkage rod 207 is symmetrically distributed on the second T-shaped commutator. The first hand crank 203 is connected to the two output shafts of the second T-type commutator 206, and the longitudinal connecting rod 207 passes through the connecting column 105 and is fixedly connected to the input shaft of the worm gear screw lift 208; the threaded rod connected to the output shaft of the worm gear screw lift 208 extends to the inside of the n-type lifting frame 107, and the inside of the n-type lifting frame 107 is provided with a threaded hole matching the threaded rod; the four worm gear screw lifts 208 can be driven to run synchronously by rotating the first hand crank 203, so as to realize the synchronous lifting of the two n-type lifting frames 107;

[0046] The staircase assembly 3 includes a top fixing frame 301, a fixing seat 302, a staircase body 303, directional moving wheels 304, and a moving guide rail 305;

[0047] The top fixing frame 301 is fixed to one end of the outer wall of an n-shaped lifting frame 107 and is located below the transverse connecting frame 108. The fixing seat 302 is fixed to the bottom of the top fixing frame 301. The top of the staircase body 303 is rotatably connected to the fixing seat 302. The staircase body 303 is used for operators to climb to the top platform 109.

[0048] The movable guide rail 305 is fixedly installed on the top of the base 101, and the movable guide rail 305 is close to another n-shaped lifting frame 107. The directional movable wheel 304 is rotatably connected to the bottom of the stair body 303, and the roller part of the directional movable wheel 304 is rollingly connected to the inner side of the movable guide rail 305; the top fixed frame 301, the fixed seat 302, the directional movable wheel 304, and the movable guide rail 305 are used to realize the angle adjustment of the stair body 303, thereby adapting to the height change of the top platform 109.

[0049] In this embodiment: the entire device can be conveniently transferred by the universal wheel 102, so that the device can be conveniently close to the bus to be maintained. After the position of the device is determined, the contact surface between the base 101 and the ground can be increased by the hand jack 103, so that the entire device is fixed in this position and more stable;

[0050] When the height of the top platform 109 needs to be adjusted, the first hand crank 203 can be rotated, and the four worm gear elevators 208 can be driven to run synchronously through the transmission of the first worm gear reducer 202, the first T-type commutator 204, the transverse linkage rod 205, the two second T-type commutators 206 and the longitudinal linkage rod 207. The worm gear elevators 208 are grouped in pairs to drive an n-type lifting frame 107 to move up and down along the inner wall of the U-shaped fixed frame 106 (it should be supplemented that the inner cavity size of the U-shaped fixed frame 106 matches the outer wall size of the vertical part of the n-type lifting frame 107, which is used to provide guidance and limit for the up and down movement of the n-type lifting frame 107). The height adjustment of the top platform 109 can be achieved by the synchronous up and down movement of the two n-type lifting frames 107, and then it can adapt to the top operation requirements of buses of different heights;

[0051] At the same time, during the up and down movement of the n-type lifting frame 107, the top fixed frame 301 is driven to move up and down synchronously. The top fixed frame 301 pulls the top of the stair body 303 to rise and fall synchronously through the fixed seat 302, and the bottom of the stair body 303 moves along the trajectory of the guide rail 305 through the positioning and directional moving wheel 304, that is, the vertical height of the ladder body 303 is synchronously adjusted with the height change of the top platform 109, thereby ensuring the climbing operation of different heights.

[0052] Please refer to Figures 1 to 4 The guardrail assembly 4 includes a fixed guardrail 401, a first folding guardrail 402, a second folding guardrail 403, and a side guardrail 404;

[0053] The fixed guardrail 401 is installed on both sides of the staircase body 303 and one side of the top platform 109 close to the staircase body 303;

[0054] The top of the n-shaped lifting frame 107 protrudes from both ends of the top platform 109, and the first folding guardrail 402 is rotatably connected to one side of the n-shaped lifting frame 107 through a hinge and is distributed on one side of the top platform 109 away from the fixed guardrail 401;

[0055] The second folding guardrail 403 is rotatably connected to one side of the first folding guardrail 402 through a hinge, and the side guardrail 404 is rotatably connected to one side of the two second folding guardrails 403 away from the first folding guardrail 402 through a hinge;

[0056] When the first folding guardrail 402 and the second folding guardrail 403 are folded into a "V" shape, the side guardrail 404 is close to the side of the top platform 109 to reduce the daily storage space. When the first folding guardrail 402 and the second folding guardrail 403 are unfolded into an "I" shape, the side guardrail 404 is away from the top platform 109. At this time, the side guardrail 404, the first folding guardrail 402, the second folding guardrail 403, the n-shaped lifting frame 107 and the fixed guardrail 401 are used to shield and protect the roof operation area;

[0057] The telescopic assembly 5 includes a telescopic pedal 501, a limit slide 502, a limit slide rail 503, a first bearing base 504, a rotating shaft 505, a spur gear 506, a rack 507, a second worm gear reducer 508, a vertical connecting shaft 509, a second hand crank 510, and a second bearing base 511;

[0058] The telescopic pedal 501 is slidably stored between the transverse connecting frame 108 and the top platform 109, the limiting slide 502 is symmetrically fixed on both sides of the telescopic pedal 501, the limiting slide rail 503 is fixed on the top of the transverse connecting frame 108, and the limiting slide 502 is slidably connected to the limiting slide rail 503;

[0059] The first bearing base 504 is installed at the bottom of the limiting slide rail 503, the rotating shaft 505 is rotatably connected to the first bearing base 504 and passes through both ends of the first bearing base 504, the spur gear 506 is fixed to the outside of the rotating shaft 505, the rack 507 is fixed to the bottom of the telescopic pedal 501, the spur gear 506 is meshed with the rack 507, and when the rotating shaft 505 rotates, the rack 507 is driven by the spur gear 506 to move horizontally, so as to realize the horizontal movement operation of the telescopic pedal 501;

[0060] The second worm gear reducer 508 is distributed on the outer end of the horizontal connecting frame 108 and the top platform 109, one end of the rotating shaft 505 passes through the outer side of the horizontal connecting frame 108 and is connected to the output shaft of the second worm gear reducer 508, the vertical connecting shaft 509 is fixedly connected to the top of the input shaft of the second worm gear reducer 508, the top of the vertical connecting shaft 509 protrudes above the top of the n-shaped lifting frame 107 and is fixedly connected to the second hand crank 510;

[0061] A second bearing base 511 is fixedly mounted on the outer end surface of the n-shaped lifting frame 107, and a vertical connecting shaft 509 passes through the upper and lower ends of the second bearing base 511. The second bearing base 511 is used to provide support for the rotation of the vertical connecting shaft 509;

[0062] A spring lock and a fixing hook are installed on the top of the first folding guardrail 402 and the second folding guardrail 403 respectively. When the first folding guardrail 402 and the second folding guardrail 403 are folded, the first folding guardrail 402 and the second folding guardrail 403 are fixed in the folded state through the connection between the spring lock and the fixing hook.

[0063] In this embodiment, after the operator climbs onto the top platform 109, the telescopic assembly 5 can be adjusted according to the distance between the top platform 109 and the bus, so that the telescopic pedal 501 moves out to fill the gap between the top platform 109 and the bus. The operation is as follows:

[0064] Manually rotate the second hand crank 510, and the spur gear 506 can be driven to rotate through the transmission of the vertical connecting shaft 509, the second worm gear reducer 508, and the rotating shaft 505. The spur gear 506 drives the rack 507 to move horizontally, and the rack 507 drives the telescopic pedal 501 to move out from the bottom of the top platform 109. When the side of the telescopic pedal 501 is close to the side of the bus, it can be done. This operation can effectively avoid stepping on the air and making subsequent operations safer. When the device is placed, the parking distance from the bus does not need to be very strict, and the overall operation is more convenient;

[0065] After adjusting the telescopic component 5, the guardrail component 4 can be unfolded by unlocking the spring lock between the first folding guardrail 402 and the second folding guardrail 403, and then unfolding it into a straight state. At this time, the first folding guardrail 402 and the second folding guardrail 403, the side guardrail 404 and the fixed guardrail 401 on the side of the top platform 109 will cover the top of the entire bus, the telescopic pedal 501, and the surrounding areas of the top platform 109, thereby realizing the shielding and protection of the bus for aerial operations.

[0066] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A high-altitude work platform for buses, comprising a work platform body (1) consisting of a base (101), universal wheels (102), and a hand jack (103), wherein the universal wheels (102) are fixedly mounted at four end corners of the bottom of the base (101), and the hand jack (103) is fixedly mounted on the outer sides of the four end corners of the base (101), characterized in that: The workbench body (1) further comprises an H-shaped fixing frame (104), a connecting column (105), a U-shaped fixing frame (106), an N-shaped lifting frame (107), a transverse connecting frame (108), and a top platform (109); The H-shaped fixing frame (104) is symmetrically fixed to the two ends of the top of the base (101), the two connecting columns (105) are symmetrically fixed to the middle of the top of the H-shaped fixing frame (104), the U-shaped fixing frame (106) is fixed to the top of the two connecting columns (105), the vertical sliding rod of the n-shaped lifting frame (107) is connected to the inner side of the U-shaped fixing frame (106) and protrudes to the top of the U-shaped fixing frame (106), the transverse connecting frame (108) and the top platform (109) are fixed in the middle of the two n-shaped lifting frames (107), and the transverse connecting frame (108) is located below the top platform (109). The height of the top platform (109) can be adjusted by moving the n-shaped lifting frame (107) up and down, so as to adapt to buses of different heights; A four-link worm gear screw lifting assembly (2) extending to the inside of the n-shaped lifting frame (107) is distributed on the top of the base (101) and the H-shaped fixing frame (104), and the four-link worm gear screw lifting assembly (2) is used to realize the lifting operation of the n-shaped lifting frame (107); A staircase assembly (3) is distributed between the top of the base (101) and an n-shaped lifting frame (107), and the staircase assembly (3) is used for workers to climb to the top of the top platform (109); Guardrail components (4) are distributed on the outside of the top platform (109) and the staircase component (3), and the guardrail components (4) are used to protect the periphery of the top platform (109) and the staircase component (3); A telescopic assembly (5) is provided between the transverse connecting frame (108) and the top platform (109), and the telescopic assembly (5) is used to block the gap between the top platform (109) and the bus.

2. The high-altitude work platform for buses according to claim 1, characterized in that: The four-link worm gear screw lifting assembly (2) comprises a fixed column (201), a first worm gear reducer (202), a first hand crank (203), a first T-shaped commutator (204), a transverse linkage rod (205), a second T-shaped commutator (206), a longitudinal linkage rod (207), and a worm gear screw lifting machine (208); The fixing column (201) is fixed to the middle of the top of the base (101), the first worm gear reducer (202) is installed on the top of the fixing column (201), the first hand crank (203) is fixedly connected to the input shaft of the first worm gear reducer (202), the first T-type commutator (204) is installed on one side of the first worm gear reducer (202), and the input shaft of the first T-type commutator (204) is connected to the output shaft of the first worm gear reducer (202); The transverse linkage rods (205) are symmetrically distributed at two ends of the first T-shaped commutator (204) and are connected to two output shafts of the first T-shaped commutator (204); The second T-shaped commutator (206) is installed on the top of the H-shaped fixing frame (104) and is located between the two connecting columns (105); the worm screw elevator (208) is symmetrically installed on both sides of the top of the H-shaped fixing frame (104) and is located directly below the vertical portion of the U-shaped fixing frame (106); The other end of the transverse linkage rod (205) is fixedly connected to the input shaft of the second T-type commutator (206), the longitudinal linkage rod (207) is symmetrically distributed on both sides of the second T-type commutator (206) and connected to the two output shafts of the second T-type commutator (206), and the longitudinal linkage rod (207) passes through the connecting column (105) and is fixedly connected to the input shaft of the worm gear screw elevator (208); The threaded rod connected to the output shaft of the worm gear screw lift (208) extends through the inside of the N-shaped lift frame (107), and the inside of the N-shaped lift frame (107) is provided with a threaded hole matching the threaded rod; The four worm screw elevators (208) can be driven to operate synchronously by rotating the first hand crank (203), so as to realize the synchronous lifting of the two n-type lifting frames (107).

3. The high-altitude work platform for buses according to claim 1 is characterized in that: The staircase assembly (3) comprises a top fixing frame (301), a fixing seat (302), a staircase body (303), directional moving wheels (304), and a moving guide rail (305); The top fixing frame (301) is fixed to one end of the outer wall of an n-shaped lifting frame (107) and is located below the transverse connecting frame (108); the fixing seat (302) is fixed to the bottom of the top fixing frame (301); the top of the staircase body (303) is rotatably connected to the fixing seat (302); the staircase body (303) is used for operators to climb to the top platform (109); The movable guide rail (305) is fixedly installed on the top of the base (101), the movable guide rail (305) is close to another n-shaped lifting frame (107), the directional movable wheel (304) is rotatably connected to the bottom of the staircase body (303), and the roller part of the directional movable wheel (304) is rollingly connected to the inner side of the movable guide rail (305); The top fixing frame (301), the fixing seat (302), the directional moving wheels (304) and the moving guide rail (305) are used to achieve angle adjustment of the staircase body (303), thereby adapting to the height change of the top platform (109).

4. The high-altitude work platform for buses according to claim 2, characterized in that: The guardrail assembly (4) comprises a fixed guardrail (401), a first folding guardrail (402), a second folding guardrail (403), and a side guardrail (404); The fixed guardrail (401) is installed on both sides of the staircase body (303) and on one side of the top platform (109) close to the staircase body (303); The top of the n-shaped lifting frame (107) protrudes from two ends of the top platform (109); the first folding guardrail (402) is rotatably connected to one side of the n-shaped lifting frame (107) through a hinge and is distributed on a side of the top platform (109) away from the fixed guardrail (401); The second folding guardrail (403) is rotatably connected to one side of the first folding guardrail (402) via a hinge, and the side protection rail (404) is rotatably connected to one side of the two second folding guardrails (403) away from the first folding guardrail (402) via a hinge; When the first folding guardrail (402) and the second folding guardrail (403) are folded into a "V" shape, the side guardrail (404) is close to the side of the top platform (109) to reduce the daily storage space; when the first folding guardrail (402) and the second folding guardrail (403) are unfolded into a "I" shape, the side guardrail (404) is away from the top platform (109); at this time, the side guardrail (404), the first folding guardrail (402), the second folding guardrail (403), the N-shaped lifting frame (107) and the fixed guardrail (401) are used to shield and protect the roof operation area.

5. The high-altitude work platform for buses according to claim 1, characterized in that: The telescopic assembly (5) comprises a telescopic pedal (501), a limiting slide seat (502), a limiting slide rail (503), a first bearing base (504), a rotating shaft (505), a spur gear (506), a rack (507), a second worm gear reducer (508), a vertical connecting shaft (509), a second hand crank (510), and a second bearing base (511); The telescopic pedal (501) is slidably stored between the transverse connecting frame (108) and the top platform (109), the limiting slide seat (502) is symmetrically fixed on both sides of the telescopic pedal (501), the limiting slide rail (503) is fixed on the top of the transverse connecting frame (108), and the limiting slide seat (502) is slidably connected to the limiting slide rail (503); The first bearing base (504) is installed at the bottom of the limiting slide rail (503), the rotating shaft (505) is rotatably connected to the first bearing base (504) and passes through both ends of the first bearing base (504), the spur gear (506) is fixed to the outside of the rotating shaft (505), the rack (507) is fixed to the bottom of the telescopic pedal (501), the spur gear (506) is meshed with the rack (507), and when the rotating shaft (505) rotates, the rack (507) is driven by the spur gear (506) to move horizontally, so as to realize the horizontal movement operation of the telescopic pedal (501); The second worm gear reducer (508) is distributed on the outer end of the transverse connecting frame (108) and the top platform (109), one end of the rotating shaft (505) passes through the outer side of the transverse connecting frame (108) and is connected to the output shaft of the second worm gear reducer (508), the vertical connecting shaft (509) is fixedly connected to the top of the input shaft of the second worm gear reducer (508), the top of the vertical connecting shaft (509) protrudes above the top of the n-shaped lifting frame (107) and is fixedly connected to the second hand crank (510); A second bearing base (511) is fixedly mounted on the outer end surface of the n-type lifting frame (107), and the vertical connecting shaft (509) passes through the upper and lower ends of the second bearing base (511). The second bearing base (511) is used to provide support for the rotation of the vertical connecting shaft (509).

6. The high-altitude work platform for buses according to claim 4, characterized in that: A spring lock and a fixing hook are respectively installed on the top of the first folding guardrail (402) and the second folding guardrail (403). When the first folding guardrail (402) and the second folding guardrail (403) are folded, the first folding guardrail (402) and the second folding guardrail (403) are fixed in the folded state through the connection between the spring lock and the fixing hook.

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