Maintenance platform

Abstract

The utility model relates to the field of locomotive maintenance, and discloses a maintenance platform. A maintenance workshop of the locomotive is provided with multiple layers of maintenance working faces which are arranged at intervals in the vertical direction, the maintenance platform comprises a rotating frame, a lifting table and a rotating driving piece, and the rotating frame can be selectively installed on any maintenance working face and is rotationally connected with the corresponding maintenance working face; a lifting driving part of the lifting table can drive a working platform of the lifting table to vertically move; when the rotary driving part drives the rotary frame to drive the lifting table to rotate, the lifting table can be switched from the maintenance position where the corresponding maintenance working face stretches out to the receding position where the corresponding maintenance working face retracts. The maintenance platform can vertically move between the existing two adjacent layers of maintenance working surfaces, so that different types of locomotives can be maintained on the same maintenance working surface, the operation is convenient, and the maintenance efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of locomotive maintenance, and in particular relates to a maintenance platform. Background Art

[0002] During operation, locomotives are subject to a certain degree of wear and tear. To ensure vehicle safety and extend their service life, in addition to routine maintenance, locomotives are also regularly overhauled. Existing locomotive maintenance workshops are often equipped with three-tiered maintenance platforms, corresponding to the locomotive's running gear, midsection, and roof. Workers can perform maintenance operations simultaneously on all three platforms without interfering with each other, greatly improving maintenance efficiency.

[0003] Existing locomotives are mainly divided into two types: electric locomotives and diesel locomotives. The structures of electric locomotives and diesel locomotives are different. For example, the heights of the headlights of electric locomotives and diesel locomotives are different. Therefore, when repairing electric locomotives and diesel locomotives, the height of the three-layer maintenance platform is only suitable for repairing one type of locomotive. If the same three-layer maintenance platform is used to repair another type of locomotive, the staff must step on the ladder to carry out the repair, which is not only inconvenient to operate and affects the efficiency of repair, but also threatens the life and health of the staff.

[0004] Therefore, a maintenance platform is needed urgently to solve the above problems. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a maintenance platform that can be moved vertically between two adjacent existing maintenance work surfaces to achieve maintenance of different types of locomotives on the same maintenance work surface, which is easy to operate and improves maintenance efficiency.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] A maintenance platform is provided for the maintenance of locomotives. The maintenance workshop of the locomotive is provided with multiple layers of maintenance working surfaces arranged at intervals in the vertical direction. The maintenance platform includes:

[0008] The rotating frame can be installed on any maintenance work surface and rotated to connect with the corresponding maintenance work surface;

[0009] A lifting platform is provided on the rotating frame, and the lifting platform includes a work platform movable in a vertical direction and a lifting drive member, wherein the output end of the lifting drive member is connected to the work platform and is used to drive the work platform to move vertically, and the lifting platform has an inspection position in which the work platform is extended relative to the corresponding inspection work surface and an avoidance position in which the work platform is retracted relative to the corresponding inspection work surface;

[0010] The rotary drive member is arranged on the maintenance working surface. The output end of the rotary drive member is connected to the rotating frame and is used to drive the rotating frame to drive the lifting platform to move, so that the lifting platform is switched from the maintenance position to the avoidance position.

[0011] Optionally, the maintenance platform further comprises a telescopic staircase, one end of the telescopic staircase is hinged to the rotating frame, and the other end is hinged to the working platform, and when the height of the working platform changes, the telescopic staircase is extended or shortened.

[0012] Optionally, the telescopic stairs include multiple connected telescopic units, each of which includes a foot pedal, and two cross-arranged connecting rods are provided on each side of the foot pedal along its length, and the two connecting rods located on the same side of the foot pedal are hinged, the connecting rods are hinged to the corresponding foot pedal, and the ends of the connecting rods are hinged to the connecting rods of adjacent telescopic units. When the height of the working platform changes, the crossing angle of the two connecting rods located on the same side of the foot pedal and the angle between the connecting rod and the connecting rod of the adjacent telescopic unit both change, and the telescopic stairs are extended or shortened.

[0013] Optionally, a locking member is provided on the telescopic staircase, and when the working platform moves to a preset position, the locking member is used to lock the telescopic length of the telescopic staircase.

[0014] Optionally, the lifting platform also includes a base and two sets of scissor assemblies, the base is fixedly connected to the rotating frame, the two sets of scissor assemblies are arranged on both sides of the working platform along the first direction, the scissor assembly includes two cross-arranged first scissor arms and a second scissor arm, the first scissor arm is hinged to the second scissor arm, one end of the first scissor arm is hinged to the base, and the other end is slidably connected to the working platform and can rotate relative to the working platform, one end of the second scissor arm is hinged to the working platform, and the other end is slidably connected to the base and can rotate relative to the base, the lifting drive member is arranged on the base, and the output end of the lifting drive member is connected to the first scissor arm or the second scissor arm, for driving the other end of the first scissor arm to slide along the second direction or driving the other end of the second scissor arm to position along the second direction, the first direction is perpendicular to the second direction.

[0015] Optionally, a first slide rail extending along the second direction is provided on the working platform, and a first slider is provided at the other end of the first scissors arm, the first slider is hinged to the first scissors arm, and slides with the first slide rail; a second slide rail extending along the second direction is provided on the base, and a second slider is provided at the other end of the second scissors arm, the second slider is hinged to the second scissors arm, and slides with the second slide rail.

[0016] Optionally, the maintenance platform also includes a connecting seat that can be installed on any maintenance work surface, the rotating frame includes a mounting seat, a transmission shaft and a rotating frame, the mounting seat is fixedly connected to the rotating frame, the lifting platform is fixed to the mounting seat, and the rotating frame is detachably mounted on the connecting seat, one end of the transmission shaft is connected to the output end of the rotating drive component, and the other end passes through the connecting seat and is fixedly connected to the rotating frame, and the rotating drive component drives the rotating frame through the transmission shaft to drive the mounting seat to rotate, thereby driving the lifting platform to rotate.

[0017] Optionally, a first opening and a second opening are provided on the rotating frame, the first opening is located at the connection between the rotating frame and the lifting platform, and the second opening is located on a side of the maintenance working surface facing away from the locomotive.

[0018] Optionally, a height-adjustable enclosure is provided on the working platform, and the enclosure is arranged along the circumference of the working platform to enclose the working platform.

[0019] Optionally, the maintenance platform further includes a control component, which is electrically connected to both the rotary drive component and the lifting drive component, and is used to control the opening and closing of the rotary drive component and the lifting drive component.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] The utility model provides a maintenance platform. When the rotary drive member drives the rotating frame to rotate, the rotating frame can drive the lifting platform set thereon to move, so as to move the lifting platform to the maintenance position. The lifting platform extends relative to the maintenance work surface, so that the lifting platform can be closer to the locomotive relative to the maintenance work surface, so as to perform maintenance on the locomotive. When the maintenance is completed and the locomotive needs to leave the maintenance workshop, the rotating frame is driven to drive the lifting platform to the avoidance position. The lifting platform gradually moves away from the locomotive and retracts relative to the maintenance work surface to avoid the lifting platform affecting the departure of the locomotive, thereby ensuring the safety of the maintenance platform. When the locomotive is being maintained, the rotating frame is first installed on the maintenance work surface of a suitable height according to the requirements of the locomotive maintenance, and then the work platform is driven to move vertically. The position of the working platform can be higher than the corresponding maintenance work surface, so that the staff can adjust the height of the lifting platform to maintain the same position of different models of locomotives on the same maintenance work surface, thereby expanding the applicability of the existing maintenance work surface, and is easy to operate, thereby improving maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A first schematic diagram of the maintenance platform provided by the utility model;

[0023] Figure 2 A second schematic diagram of the maintenance platform provided by the present invention;

[0024] Figure 3 yes Figure 1 Enlarged view of point A in the middle.

[0025] in:

[0026] 100. Maintenance working surface;

[0027] 1. Rotating frame; 11. Mounting seat; 12. Transmission shaft; 13. Rotating frame;

[0028] 2. Lifting platform; 21. Working platform; 211. Enclosure; 22. Base; 23. Scissor assembly; 231. First scissor arm; 232. Second scissor arm;

[0029] 3. Rotating drive parts;

[0030] 4. Telescopic stairs; 41. Railings;

[0031] 5. Connecting seat; 51. Connecting plate; 52. Bearing;

[0032] 6. Control parts. DETAILED DESCRIPTION

[0033] It should be understood that, in the description of the present invention, the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0034] It should be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0035] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0036] like Figures 1 to 3 As shown, this embodiment provides a maintenance platform that can move vertically between two adjacent existing maintenance work surfaces 100 to achieve maintenance of different types of locomotives on the same maintenance work surface 100, which is easy to operate and improves maintenance efficiency.

[0037] See Figure 1The maintenance workshop of the locomotive is provided with a multi-layer maintenance working surface 100 arranged at intervals in the vertical direction. The maintenance platform includes a rotating frame 1, a lifting platform 2 and a rotating drive member 3. The rotating frame 1 can be installed on any maintenance working surface 100 and is rotatably connected to the corresponding maintenance working surface 100; the lifting platform 2 is arranged on the rotating frame 1, and the lifting platform 2 includes a working platform 21 movable in the vertical direction and a lifting drive member (not shown in the figure). The output end of the lifting drive member is connected to the working platform 21 for driving the working platform 21 to move vertically. The lifting platform 2 has an maintenance position extended relative to the corresponding maintenance working surface 100 and a avoidance position retracted relative to the corresponding maintenance working surface 100; the rotating drive member 3 is provided on the maintenance working surface 100, and the output end of the rotating drive member 3 is connected to the rotating frame 1, for driving the rotating frame 1 to drive the lifting platform 2 to move, so that the lifting platform 2 is switched from the maintenance position to the avoidance position.

[0038] The maintenance platform provided in this embodiment has the following features: when the rotary drive member 3 drives the rotating frame 1 to rotate, the rotating frame 1 can drive the lifting platform 2 arranged thereon to move, so as to move the lifting platform 2 to the maintenance position, and the lifting platform 2 extends relative to the maintenance working surface 100, so that the lifting platform 2 can be closer to the locomotive relative to the maintenance working surface 100, so as to perform maintenance on the locomotive; when the maintenance is completed and the locomotive needs to leave the maintenance workshop, the rotating frame 1 is driven to drive the lifting platform 2 to the avoidance position, and the lifting platform 2 gradually moves away from the locomotive and retracts relative to the maintenance working surface 100 to avoid the lifting platform 2 affecting the departure of the locomotive, thereby ensuring the safety of the maintenance platform. When overhauling a locomotive, the rotating frame 1 is first installed on an overhaul work surface 100 of a suitable height according to the requirements of the locomotive overhaul, and then the working platform 21 is driven to move vertically. The position of the working platform 21 can be higher than the corresponding overhaul work surface 100, so that the staff can overhaul the same position of different models of locomotives on the same overhaul work surface 100 by adjusting the height of the lifting platform 2, thereby expanding the applicability of the existing overhaul work surface 100, making it easy to operate, and improving the overhaul efficiency.

[0039] Optionally, see Figure 1 The maintenance platform also includes a telescopic staircase 4, one end of which is hinged to the rotating frame 1 and the other end is hinged to the work platform 21. When the height of the work platform 21 changes, the telescopic staircase 4 extends or shortens to match the height change of the work platform 21. This allows workers to reach the lifting platform 2 from the corresponding maintenance work surface 100 via the telescopic staircase 4 regardless of the height of the work platform 21, improving the user experience for workers. When the telescopic staircase 4 extends or shortens, it rotates relative to the rotating frame 1 and the work platform 21. The hinged connection of the telescopic staircase 4 to the rotating frame 1 and the work platform 21 is to facilitate the rotation of the telescopic staircase 4.

[0040] In this embodiment, the telescopic staircase 4 comprises a plurality of interconnected telescopic units, each of which includes a footrest. Two cross-connecting rods are provided along each side of the footrest along its length. The two connecting rods on the same side of the footrest are hinged, and the ends of the connecting rods are hinged to the connecting rods of adjacent telescopic units. The footrest is hinged to the corresponding connecting rods. When the height of the work platform 21 changes, the intersection angle of the two connecting rods on the same side of the footrest and the angle between the connecting rods and the connecting rods of adjacent telescopic units change, causing the telescopic staircase 4 to extend or contract. In other words, the two connecting rods on the same side of the footrest form a scissor-like structure. The hinged connection allows the two connecting rods to rotate about the same point, thereby converting the input rotational motion into linear motion at the ends of the connecting rods, thereby changing the length of the telescopic unit. The ends of the connecting rods are hinged to the connecting rods of adjacent telescopic units, forming a scissor-like structure between the adjacent telescopic units, thereby changing the overall length of the telescopic staircase 4. The footrests are hinged to the corresponding connecting rods, ensuring that the footrests remain horizontal during rotation, making it easier for workers to step on them.

[0041] Specifically, when the working platform 21 moves upward, the intersection angle of the two connecting rods located on the same side of the foot pedal becomes smaller, the straight-line distance between the two ends of the connecting rod becomes larger, and the straight-line length of each telescopic unit becomes longer. At the same time, the angle between the connecting rod and the connecting rod of the adjacent telescopic unit gradually becomes larger, so that the straight-line spacing between the two adjacent telescopic units also gradually increases, and the telescopic stairs 4 is extended; when the working platform 21 moves downward, the intersection angle of the two connecting rods located on the same side of the foot pedal and the angle between the connecting rod and the connecting rod of the adjacent telescopic unit change in the opposite direction to when the working platform 21 moves upward, and will not be repeated here.

[0042] Furthermore, the telescopic staircase 4 can be connected to the rotating frame 1 and the working platform 21 through a pin to achieve the hinged connection between the telescopic staircase 4, the rotating frame 1 and the working platform 21.

[0043] In other embodiments, the telescopic staircase 4 may use an existing telescopic staircase 4 , which will not be described in detail here.

[0044] Furthermore, the telescopic staircase 4 is provided with a locking member. When the work platform 21 is moved to a preset position, the locking member is used to lock the telescopic staircase 4 at its current length, thereby fixing the telescopic staircase 4 at its current length. This prevents the telescopic staircase 4 from moving when a worker steps on it, thereby ensuring the worker's safety. The preset position is determined based on the location of the locomotive component to be inspected and the height of the corresponding inspection work surface 100.

[0045] Specifically, the locking member includes a threaded rod, and a connecting hole and a threaded hole connected to the connecting hole are provided on the rotating frame 1. The axle pin is rotatably inserted into the connecting hole, and the threaded rod can pass through the threaded hole and extend into the connecting hole. When the working platform 21 moves to the preset position, the threaded rod is screwed, and the length of the threaded rod extending into the connecting hole increases. The threaded rod abuts against the pin shaft, which can limit the rotation of the pin shaft, so that the telescopic stairs 4 cannot rotate, thereby fixing the telescopic stairs 4 at the current length.

[0046] Further, see Figure 1 The telescopic staircase 4 is also provided with a handrail 41 to further ensure the safety of the staff.

[0047] Optionally, see Figure 1 The lifting platform 2 also includes a base 22 and two sets of scissor fork assemblies 23. The base 22 is fixedly connected to the rotating frame 1. The two sets of scissor fork assemblies 23 are respectively arranged on both sides of the working platform 21 along the first direction. The scissor fork assembly 23 includes two cross-arranged first scissor fork arms 231 and second scissor fork arms 232. The first scissor fork arm 231 is hinged to the second scissor fork arm 232. One end of the first scissor fork arm 231 is hinged to the base 22, and the other end is slidably connected to the working platform 21 and can rotate relative to the working platform 21. One end of the second scissor fork arm 232 is hinged to the working platform 21, and the other end is slidably connected to the base 22 and can rotate relative to the base 22. The lifting drive member is arranged on the base 22, and the output end of the lifting drive member is connected to the first scissor fork arm 231 or the second scissor fork arm 232, for driving the other end of the first scissor fork arm 231 to move along the second direction ( Figure 1 The first and second scissor arms 232 are driven to slide in a second direction (in the X direction) or to slide in a second direction, with the first and second directions being perpendicular. The base 22 and the work platform 21 are connected by a scissor assembly 23. The scissor assembly 23 forms a triangle with the base 22 or the work platform 21, stably supporting the work platform 21 and ensuring the safety of workers on the work platform 21. The scissor assembly 23 also converts the rotational motion of the first and second scissor arms 231, 232 into linear motion at the ends of the first and second scissor arms 231, 232, to adjust the height of the work platform 21.

[0048] Specifically, when the lifting drive member drives the other end of the first scissors arm 231 to move in the second direction, the distance between the other end of the first scissors arm 231 and one end of the second scissors arm 232 along the second direction decreases, the first scissors arm 231 rotates around the hinge point between it and the second scissors arm 232, and drives the second scissors arm 232 to rotate around the hinge point between it and the first scissors arm 231, and the other end of the second scissors arm 232 moves in the second direction, so that the distance between the two ends of the first scissors arm 231 in the vertical direction increases, and the working platform 21 moves up.

[0049] In this embodiment, a first slide rail extending along the second direction is provided on the working platform 21, and a first slider is provided at the other end of the first scissors arm 231. The first slider is hinged to the first scissors arm 231 and slides with the first slide rail so that the other end of the first scissors arm 231 can slide relative to the working platform 21; a second slide rail extending along the second direction is provided on the base 22, and a second slider is provided at the other end of the second scissors arm 232. The second slider is hinged to the second scissors arm 232 and slides with the second slide rail so that the other end of the second scissors arm 232 can slide relative to the base 22.

[0050] Furthermore, the first scissors arm 231 and the second scissors arm 232, the first scissors arm 231 and the base 22, the second scissors arm 232 and the working platform 21, the first slider and the first scissors arm 231, and the second slider and the second scissors arm 232 are all connected by pins to achieve the articulation of the first scissors arm 231 and the second scissors arm 232, the first scissors arm 231 and the base 22, the second scissors arm 232 and the working platform 21, the first slider and the first scissors arm 231, and the second slider and the second scissors arm 232.

[0051] In other embodiments, the lifting platform 2 uses an existing scissor-type lifting platform 2, which will not be described in detail here.

[0052] Optionally, see Figure 1 and Figure 3 The maintenance platform also includes a connecting seat 5 that can be installed on any maintenance work surface 100. The rotating frame 1 includes a mounting seat 11, a transmission shaft 12 and a rotating frame 13. The mounting seat 11 is fixedly connected to the rotating frame 13. The lifting platform 2 is fixed to the mounting seat 11. The rotating frame 13 is detachably mounted on the connecting seat 5. One end of the transmission shaft 12 is connected to the output end of the rotating drive member 3, and the other end passes through the connecting seat 5 and is fixedly connected to the rotating frame 13. The rotating drive member 3 drives the rotating frame 13 through the transmission shaft 12 to drive the mounting seat 11 to rotate, thereby driving the lifting platform 2 to rotate.

[0053] Specifically, the connecting base 5 includes a connecting plate 51 and a bearing 52. The maintenance work surface 100 is provided with a through-hole, and the connecting plate 51 is embedded in the through-hole. The bearing 52 is located on the side of the connecting plate 51 close to the rotating frame 13 and is connected to the connecting plate 51 by bolts. The rotary drive member 3 is located on the side of the connecting plate 51 away from the rotating frame 13. The transmission shaft 12 rotatably passes through the connecting plate 51 and the bearing 52 and is fixedly connected to the rotating frame 13. The connection method between the lower end of the rotating frame 13 and the lower maintenance work surface 100 is the same as the connection method between the upper end and the upper maintenance work surface 100, and will not be repeated here.

[0054] In this embodiment, rotating frame 13 is provided with a first opening and a second opening. The first opening is located at the connection between rotating frame 13 and lifting platform 2, and the second opening is located on the side of maintenance work surface 100 facing away from the locomotive. Workers can enter rotating frame 13 through the first opening and move from inside rotating frame 13 to work platform 21 through the second opening. The provision of the first and second openings facilitates on-site access by workers.

[0055] Specifically, the cross-section of the rotating frame 13 is rectangular. The rotating frame 13 includes a plurality of support beams and a plurality of support columns. The support beams and the support columns are vertically arranged to form a frame-type rotating frame 13 , thereby increasing the strength of the rotating frame 13 .

[0056] For example, the rotating frame 13 and the mounting base 11 are both made of steel, which has high rigidity and is not easily deformed.

[0057] Optionally, see Figure 1 The work platform 21 is provided with a height-adjustable enclosure 211. The enclosure 211 is arranged along the circumference of the work platform 21 to protect the work platform 21 and prevent workers from falling from the work platform 21, thereby improving safety during maintenance. By adjusting the height of the enclosure 211, the enclosure 211 can also be prevented from contacting the upper maintenance work surface 100 when the work platform 21 moves to the avoidance position.

[0058] Furthermore, the guardrail 211 includes multiple telescopic rods and multiple cross bars. The multiple telescopic rods are arranged at intervals along the circumference of the working platform, and two adjacent telescopic rods are connected by cross bars. After the working platform 21 moves from the avoidance position to the maintenance position, the staff moves from the corresponding maintenance work surface 100 to the working platform 21. The staff can lengthen the telescopic rod by pulling the cross bar, thereby increasing the maintainable height of the guardrail 211 to protect the staff during the maintenance process; when the working platform 21 moves from the working position to the avoidance position, the staff shortens the telescopic rod by pressing down the cross bar to prevent the guardrail 211 from touching the upper maintenance work surface 100 during the movement of the working platform 21.

[0059] Optionally, see Figure 1 The maintenance platform also includes a control member 6, which is electrically connected to the rotating drive member 3 and the lifting drive member, and is used to control the opening and closing of the rotating drive member 3 and the lifting drive member, so that the staff can remotely control the position of the working platform 21.

[0060] The above description is only a specific implementation method of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or replacements that can be easily thought of by those skilled in the art within the technical scope disclosed in the present invention fall within the protection scope and disclosure scope of the present invention.

Claims

1. A maintenance platform for maintenance of a locomotive, wherein the maintenance workshop of the locomotive is provided with a multi-layer maintenance working surface (100) arranged at intervals in a vertical direction, characterized in that: The maintenance platform includes: A rotating frame (1) can be selectively installed on any one of the maintenance work surfaces (100) and is rotatably connected to the corresponding maintenance work surface (100); A lifting platform (2) is arranged on the rotating frame (1), the lifting platform (2) includes a working platform (21) movable in a vertical direction and a lifting drive member, the output end of the lifting drive member is connected to the working platform (21) and is used to drive the working platform (21) to move vertically, and the lifting platform (2) has an inspection position extending relative to the corresponding inspection working surface (100) and a avoidance position retracted relative to the corresponding inspection working surface (100); A rotary drive member (3) is provided on the maintenance working surface (100), and an output end of the rotary drive member (3) is connected to the rotating frame (1) and is used to drive the rotating frame (1) to drive the lifting platform (2) to move, so that the lifting platform (2) switches from the maintenance position to the avoidance position.

2. The maintenance platform according to claim 1, characterized in that: The maintenance platform further comprises a telescopic staircase (4), one end of the telescopic staircase (4) is hinged to the rotating frame (1), and the other end is hinged to the working platform (21). When the height of the working platform (21) changes, the telescopic staircase (4) is extended or shortened.

3. The maintenance platform according to claim 2, characterized in that: The telescopic staircase (4) includes a plurality of connected telescopic units, each of which includes a foot pedal. Two cross-arranged connecting rods are provided on each side of the foot pedal along its length direction, and the two connecting rods located on the same side of the foot pedal are hinged, the connecting rod is hinged to the corresponding foot pedal, and the end of the connecting rod is hinged to the connecting rod of the adjacent telescopic unit. When the height of the working platform (21) changes, the crossing angle of the two connecting rods located on the same side of the foot pedal and the angle between the connecting rod and the connecting rod of the adjacent telescopic unit are changed, and the telescopic staircase (4) is extended or shortened.

4. The maintenance platform according to claim 2, characterized in that: The telescopic staircase (4) is provided with a locking member, and when the working platform (21) moves to a preset position, the locking member is used to lock the telescopic length of the telescopic staircase (4).

5. The maintenance platform according to claim 1, characterized in that: The lifting platform (2) further comprises a base (22) and two sets of scissor fork assemblies (23), wherein the base (22) is fixedly connected to the rotating frame (1), and the two sets of scissor fork assemblies (23) are respectively arranged on both sides of the working platform (21) along the first direction, and the scissor fork assemblies (23) comprise two cross-arranged first scissor fork arms (231) and second scissor fork arms (232), wherein the first scissor fork arms (231) and the second scissor fork arms (232) are hinged, and one end of the first scissor fork arm (231) is hinged to the base (22), and the other end is slidably connected to the working platform (21), and can be relatively The working platform (21) rotates, one end of the second scissor arm (232) is hinged to the working platform (21), and the other end is slidably connected to the base (22), and can rotate relative to the base (22), the lifting drive member is arranged on the base (22), and the output end of the lifting drive member is connected to the first scissor arm (231) or the second scissor arm (232), and is used to drive the other end of the first scissor arm (231) to slide along the second direction or drive the other end of the second scissor arm (232) to position along the second direction, and the first direction is perpendicular to the second direction.

6. The maintenance platform according to claim 5, characterized in that: The working platform (21) is provided with a first slide rail extending along the second direction, and the other end of the first scissor arm (231) is provided with a first slider, the first slider is hinged to the first scissor arm (231) and slides with the first slide rail; the base (22) is provided with a second slide rail extending along the second direction, and the other end of the second scissor arm (232) is provided with a second slider, the second slider is hinged to the second scissor arm (232) and slides with the second slide rail.

7. The maintenance platform according to claim 1, characterized in that: The maintenance platform also includes a connecting seat (5) that can be installed on any of the maintenance work surfaces (100), the rotating frame (1) includes a mounting seat (11), a transmission shaft (12) and a rotating frame (13), the mounting seat (11) is fixedly connected to the rotating frame (13), the lifting platform (2) is fixed to the mounting seat (11), the rotating frame (13) is detachably installed on the connecting seat (5), one end of the transmission shaft (12) is connected to the output end of the rotating drive member (3), and the other end passes through the connecting seat (5) and is fixedly connected to the rotating frame (13), the rotating drive member (3) drives the rotating frame (13) through the transmission shaft (12) to drive the mounting seat (11) to rotate, thereby driving the lifting platform (2) to rotate.

8. The maintenance platform according to claim 7, characterized in that: The rotating frame (13) is provided with a first opening and a second opening, wherein the first opening is located at the connection between the rotating frame (13) and the lifting platform (2), and the second opening is located on a side of the maintenance working surface (100) facing away from the locomotive.

9. The maintenance platform according to any one of claims 1 to 8, characterized in that: A height-adjustable enclosure (211) is provided on the working platform (21), and the enclosure (211) is arranged along the circumference of the working platform (21) and is used to enclose the working platform (21).

10. The maintenance platform according to any one of claims 1 to 8, characterized in that: The maintenance platform further comprises a control member (6), which is electrically connected to the rotary drive member (3) and the lifting drive member, and is used to control the opening and closing of the rotary drive member (3) and the lifting drive member.

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