A mechanical arm for repairing high-altitude lighting fixtures at airports

Abstract

The present invention relates to the field of mechanical arm technology, and specifically discloses a mechanical arm for repairing high-altitude lighting fixtures at an airport, comprising an adjustable support arm, a first clamp and a second clamp, wherein the second clamp comprises a beam frame and two adaptive clamping mechanisms; a guide rod and a main shaft are fixed on the beam frame, and two external thread sections are arranged on the main shaft; the adaptive clamping mechanism comprises a sliding arm and a telescopic rod; a guide hole and an internal thread sleeve are arranged at one end of the sliding arm, a gear is fixed on the internal thread sleeve, and a first clamping block is fixed at the other end of the sliding arm; the telescopic rod is slidably fixed on the sliding arm, one end of the telescopic rod is a rack portion, the rack portion is meshed with the gear, and a second clamping block is fixed at the other end of the telescopic rod; the guide hole is sleeved on the guide rod, and the internal thread sleeve is sleeved on the main shaft and matched with the external thread section. When disassembling and repairing the high-altitude lighting fixture, the mechanical arm for repairing the high-altitude lighting fixture at the airport can temporarily fix the lamp body, significantly improving the operating efficiency and safety, and it is compact, highly flexible, and easy to carry.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical arms, and in particular to a mechanical arm for repairing airport high-altitude lamps. Background Art

[0002] The lighting lamps and some navigation lights in the airport are high-altitude lamps. The lamp body of this type of lamp is usually equipped with a bow frame, which is formed by bending metal strips and has two vertical plates and a horizontal plate. The two vertical plates are rotatably connected to the two sides of the lamp body, and the horizontal plate is provided with mounting holes for installing fasteners. The lamp body is fixed on the high pole with the help of the bow frame, which can achieve good installation stability and directional adjustability. However, when repairing high-altitude lamps that do not have lifting functions, maintenance personnel are required to disassemble and repair the lamp body in a high-altitude working environment. Since the lamp body is relatively bulky and most lamp bodies are not designed with a portion reserved for clamping and fixing, during the disassembly process, the existing support tools cannot be used to effectively temporarily fix the lamp body. The operator needs to hold the lamp while removing the screws to prevent it from slipping. This operation method is inefficient and greatly increases the difficulty of operation and safety hazards. The same problem also exists when reinstalling the repaired lamp body. At the same time, in the process of repairing the inside of the lamp body, it is usually necessary to adjust the position and direction of the lamp body according to the assembly characteristics of the lamp body. In the high-altitude working environment, there is a lack of suitable auxiliary tools to support and fix the lamp, which brings certain inconveniences to the actual maintenance operation.

[0003] Based on this, it is of great significance to design a mechanical arm that can temporarily fix and support the lamp body in the high-altitude lamp to facilitate the disassembly, installation and maintenance of the lamp body. Summary of the invention

[0004] In order to solve the deficiencies in the prior art, the present invention provides an airport high-altitude lamp maintenance mechanical arm with reasonable structural design, flexible and convenient use, and capable of temporarily fixing the lamp body during disassembly and maintenance to improve operating efficiency and safety.

[0005] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0006] A mechanical arm for maintaining high-altitude lighting fixtures at an airport, comprising a first clamp and a second clamp connected via an adjustable support arm, characterized in that:

[0007] The second clamp includes a beam frame and two adaptive clamping mechanisms; a guide rod, a spindle and a motor device driving the spindle to rotate are fixed on the beam frame, the guide rod is parallel to the spindle, and two external thread sections are provided on the spindle; the adaptive clamping mechanism includes a sliding arm and a telescopic rod; a guide hole is provided at one end of the sliding arm, and an internal thread sleeve is rotatably fixed to the end, a gear is fixed to the internal thread sleeve, and a first corner-shaped clamping block is fixed to the other end of the sliding arm; the telescopic rod is slidably fixed to the sliding arm and can move axially, one end of the telescopic rod is a rack portion, the rack portion is meshed with the gear, and the other end of the telescopic rod is A second clamping block is fixedly provided to cooperate with the first clamping block; the guide hole is sleeved on the guide rod and the two are slidably matched; the two internal threaded sleeves are sleeved on the main shaft and are respectively threadedly matched with an external threaded section; during the rotation of the main shaft, the two internal threaded sleeves preferentially produce axial movement to drive the adaptive clamping mechanism to slide, and after the adaptive clamping mechanism slides until it cannot slide anymore, the two internal threaded sleeves rotate synchronously with the main shaft; when the main shaft rotates in one direction, the two sliding arms move closer to the middle, and the two first clamping blocks can respectively abut against the two vertical plates of the bow frame, and then the second clamping block approaches the corresponding first clamping block and can clamp the corresponding vertical plate.

[0008] In a preferred embodiment, a damping sleeve for increasing the movement resistance of the telescopic rod is installed on the sliding arm.

[0009] In a preferred embodiment, the internal threaded sleeve and the gear are an integral structure, and the first clamping block and the sliding arm are an integral structure.

[0010] In a preferred embodiment, the second clamping block is in a corner shape, and when the two first clamping blocks respectively abut against the two vertical plates of the arch frame, the two second clamping blocks also respectively abut against the two vertical plates of the arch frame.

[0011] In a preferred embodiment, a motor seat is provided in the middle of the beam frame, the motor device is fixed in the motor seat, a connecting seat is fixed on the motor seat, and the connecting seat is connected to the adjustable support arm;

[0012] Furthermore, a passive wheel is fixed on the main shaft, and the passive wheel is drivingly connected to the output shaft of the motor device.

[0013] In a preferred embodiment, one or more partitions are provided in the middle of the beam frame, and through holes are opened on the partitions for the main shaft and the guide rod to pass through.

[0014] In a preferred embodiment, an axial hole is provided inside the sliding arm, the telescopic rod passes through the axial hole and the two are slidably matched; the second clamping block is located on a side of the first clamping block away from the beam frame.

[0015] In a preferred embodiment, the beam frame is in the shape of a trough, with end plates at both ends; the guide rod and the main shaft are located inside the beam frame, and the guide rod and the main shaft are supported by the end plates;

[0016] Furthermore, a detachable cover plate is installed on the beam frame.

[0017] Compared with the prior art, the present invention has the following beneficial technical effects:

[0018] When disassembling and repairing the lamp body of the high-altitude lamp, the high-altitude lamp maintenance mechanical arm of this airport can be used to temporarily fix the lamp body, and the maintenance personnel do not need to hold the lamp body while disassembling it, which significantly improves the operation efficiency and safety; the high-altitude lamp maintenance mechanical arm of this airport provides support, and the disassembled lamp body can be conveniently repaired internally. During the maintenance process, the position and direction of the lamp body can be flexibly adjusted according to the assembly characteristics of the lamp body, which is convenient and fast; the high-altitude lamp of this airport uses the second clamp to clamp and fix the two vertical plates of the bow frame, providing stable and reliable support for the lamp body, and avoiding obstruction to the disassembly operation; the second clamp adopts an electric design, which can automatically match the width of the bow frame and automatically clamp and fix it, saving time and effort, and being efficient and convenient. At the same time, the high-altitude lamp maintenance mechanical arm of this airport can be applied to bow frames of different sizes, greatly expanding the scope of application. In addition, the structure of the high-altitude lamp maintenance mechanical arm of this airport is ingenious and reasonable, compact, highly flexible, easy to carry, and extremely suitable for use in the practice of high-altitude lamp maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0020] Figure 1 This is one of the schematic diagrams of the matching structure between the lamp body and the bow frame.

[0021] Figure 2 This is the second schematic diagram of the coordination structure between the lamp body and the bow frame.

[0022] Figure 3 This is one of the overall structural diagrams of the airport high-altitude lighting maintenance robotic arm.

[0023] Figure 4 This is the second schematic diagram of the overall structure of the airport high-altitude lighting maintenance robotic arm.

[0024] Figure 5 It is a schematic diagram of the structure of the second clamp.

[0025] Figure 6 Schematic diagram of the structure of the adaptive clamping mechanism.

[0026] Figure 7 It is a schematic diagram of the structure of the adaptive clamping mechanism after partial sectioning.

[0027] Figure 8 It is a schematic diagram of the matching structure of the adaptive clamping mechanism, the guide rod and the main shaft.

[0028] Fig. 9 It is a schematic diagram of the state when the two adaptive clamping mechanisms are moving toward the middle.

[0029] Fig.10 It is a schematic diagram of the state when the second clamping block moves closer to the first clamping block.

[0030] Fig.11 This is one of the schematic diagrams of the state when the airport high-altitude lighting maintenance mechanical arm provides support for the lamp body.

[0031] Fig.12 The second schematic diagram shows the state of the airport high-altitude lighting maintenance mechanical arm providing support for the lamp body.

[0032] In the figure:

[0033] 1. Lamp body;

[0034] 2. bow frame, 201, vertical board, 202, horizontal board;

[0035] 3. First clamp, 301. Base, 302. Adjustment mechanism, 303. Movable clamping flap, 304. Fixed clamping flap;

[0036] 4. Adjustable support arm;

[0037] 5. The second clamp, 501. The connecting seat, 502. The motor seat, 503. The beam, 504. The end plate, 505. The main shaft, 506. The guide rod, 507. The cover plate, 508. The second clamping block, 509. The first clamping block, 510. The sliding arm, 511. The motor device, 512. The external thread section, 513. The internal thread sleeve, 514. The gear, 515. The shaft seat, 516. The passive wheel, 517. The partition, 518. The telescopic rod, 519. The guide hole, 520. The rack portion, 521. The shaft hole, 522. The damping sleeve. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] This embodiment discloses an airport high-altitude lamp maintenance mechanical arm, which is mainly used to deal with the maintenance work of airport high-altitude lamps. The existing airport high-altitude lamps widely use the following structure:

[0040] like Figure 1 , Figure 2 As shown, a bow frame 2 is assembled on the lamp body 1. The bow frame 2 is formed by bending metal strips and has two vertical plates 201 and a horizontal plate 202. The two vertical plates 201 are rotatably connected to the two sides of the lamp body 1 respectively, and the horizontal plate 202 is provided with mounting holes for installing fasteners.

[0041] See also Figure 3 , Figure 4 As shown, the airport high-altitude lighting maintenance mechanical arm disclosed in this embodiment includes a first clamp 3 and a second clamp 5, and the first clamp 3 and the second clamp 5 are connected via an adjustable support arm 4;

[0042] See also Figure 5-Figure 8 As shown, the second clamp 5 includes a beam 503 and two adaptive clamping mechanisms that are distributed at intervals and supported by the beam 503; a guide rod 506, a main shaft 505 and a motor device 511 are fixed on the beam 503, the guide rod 506 is parallel to the main shaft 505, and the motor device 511 is used to drive the main shaft 505 to rotate; two external thread sections 512 are provided on the main shaft 505, and the two external thread sections 512 are provided with external threads with opposite spiral directions; the adaptive clamping mechanism includes a sliding arm 510 and a telescopic rod 518; a guide hole 519 is provided at one end of the sliding arm 510, and at the same time, an internal thread sleeve 513 is rotatably fixed to this end of the sliding arm 510 through an axle seat 515, and a gear 514 coaxial with the internal thread sleeve 513 is fixed on the internal thread sleeve 513, and a first corner-shaped clamping block 518 is fixed on the other end of the sliding arm 510 09; The telescopic rod 518 is slidably fixed on the sliding arm 510, so that the telescopic rod 518 can move axially. One end of the telescopic rod 518 is a rack portion 520, and the rack portion 520 is provided with teeth evenly distributed along the axial direction of the telescopic rod 518. The rack portion 520 is meshed with the gear 514, thereby forming a gear rack mechanism. The other end of the telescopic rod 518 is fixed with a second clamping block 508 that cooperates with the first clamping block 509. The second clamping block 508 can move away from and approach the first clamping block 509 as the telescopic rod 518 moves axially; the guide hole 519 is sleeved on the guide rod 506 and the two are slidably matched; the two internal thread sleeves 513 in the two adaptive clamping mechanisms are both sleeved on the main shaft 505 and are respectively threadedly matched with an external thread segment 512, thereby, the internal thread sleeve 513 and the corresponding external thread segment 512 form a screw mechanism;

[0043] like Figure 5 , Fig. 9 , Fig.10 As shown, when the second clamp 5 is not under load, that is, when it is not subjected to external force, the two internal threaded sleeves 513 preferentially produce axial movement during the rotation of the main shaft 505 to drive the adaptive clamping mechanism to slide along the guide rod 506. When the adaptive clamping mechanism cannot slide, the two internal threaded sleeves 513 rotate synchronously with the main shaft 505. When the main shaft 505 rotates in one direction, the two adaptive clamping mechanisms are driven by the corresponding screw mechanisms to move closer to the middle, and the two first clamping blocks 509 can respectively abut against the two vertical plates 201 of the bow frame 2. After that, the two adaptive clamping mechanisms cannot continue to move closer, and the two The internal threaded sleeve 513 will rotate synchronously with the main shaft 505, and the telescopic rod 518 will be driven by the corresponding gear rack mechanism to move axially, so that the second clamping block 508 is close to the corresponding first clamping block 509 to clamp the corresponding vertical plate 201; conversely, when the main shaft 505 rotates in the other direction, the two adaptive clamping mechanisms are driven by the corresponding screw mechanisms to gradually move away from each other. After the two adaptive clamping mechanisms move to the maximum spacing and cannot move further away, the two internal threaded sleeves 513 will rotate synchronously with the main shaft 505, thereby driving the second clamping block 508 to move in the direction away from the first clamping block 509.

[0044] The usage and working principle of the airport high-altitude lighting maintenance mechanical arm are as follows:

[0045] See also Figure 9-12As shown, when the lamp body of the high-altitude lamp is disassembled, the position of the second clamp is adjusted so that the two first clamping blocks 509 and the two second clamping blocks 508 are distributed around the arch frame 2, and the motor device 511 is used to drive the main shaft 505 to rotate in a predetermined direction. First, the two adaptive clamping mechanisms move closer to the middle until the two first clamping blocks 509 respectively abut against the two vertical plates 201 of the arch frame 2, and then the second clamping blocks 508 will move closer to the corresponding first clamping blocks 509 to clamp the corresponding vertical plates 201, thereby, the second clamp firmly fixes the arch frame 2, and the position of the first clamp is adjusted by bending the adjustable support arm, and the first clamp is fixed to the working platform or the lamp pole, lamp stand and other supports of the lamp. After that, the airport high-altitude lamp maintenance mechanical arm can temporarily fix the lamp body to facilitate maintenance personnel. The staff can complete the disassembly operation of the lamp body more quickly and safely; because the second clamp clamps the two vertical plates of the bow frame, and the fasteners are installed and fixed on the horizontal plate of the bow frame, the airport's high-altitude lamp maintenance mechanical arm will not constitute a substantial hindrance to the disassembly operation; with the support provided by the airport's high-altitude lamp maintenance mechanical arm, the disassembled lamp body can be further maintained. Due to the differences in the specific structures and assembly characteristics of different lamp bodies, and the different locations of damaged parts, when repairing the inside of the lamp body, the lamp body needs to maintain different directions. At this time, the good adjustability of the airport's high-altitude lamp maintenance mechanical arm can be used to adjust the position and direction of the lamp body according to actual needs to meet the maintenance needs; after the lamp body is repaired, the installation and fixation of the lamp body can be completed by reverse operation.

[0046] See also Figure 3 , Fig.11 , Fig.12 As shown, in the airport high-altitude lighting maintenance mechanical arm, the adjustable support arm 4 is used to establish support between the second clamp 5 and the first clamp 3 to provide stable support for the lamp body. It should also have good adjustable function to achieve the adjustment of the position and direction of the second clamp 5 and the first clamp 3. As far as the prior art is concerned, there is no technical obstacle to the implementation of the adjustable support arm 4. This type of device in the prior art is also called a universal arm bracket or a universal adjustment mechanical arm, which is widely used in photography, medical treatment, industrial inspection and other fields. It is usually composed of a combination of telescopic parts, joint parts and universal joints. Its shape can be adjusted by rotation and extension to achieve good adjustability. By increasing the resistance of the movable parts or setting locking parts, it can maintain the adjusted shape to provide stable support.

[0047] See also Fig. 9 , Fig.10As shown, in the airport high-altitude lighting maintenance mechanical arm, during the rotation of the main shaft 505, the two internal threaded sleeves 513 preferentially produce axial movement, in order to ensure that before the second clamp 5 clamps and fixes the bow frame 2, the two adaptive clamping mechanisms can move their positions to automatically match the width of the bow frame 2; Figure 7 As shown, during the implementation process, a ball plunger (not shown) can be installed on the shaft seat 515 to increase the rotation resistance of the internal threaded sleeve 513, and a damping sleeve 522 can be installed on the sliding arm 510 to increase the movement resistance of the telescopic rod 518. This can prevent the internal threaded sleeve 513 from rotating synchronously with the main shaft 505 first during its rotation, so as to meet the above-mentioned technical requirements.

[0048] See also Figure 3 , Figure 4 As shown, in the airport high-altitude lighting maintenance mechanical arm, the first clamp 3 is used to be fixedly connected to the work platform or the lamp pole, lamp stand and other supporting objects of the lamp to provide support for the adjustable support arm 4. The common structure in the prior art can be adopted. For example, the first clamp 3 includes a base 301, and the base 301 is equipped with a fixed clamp 304, a movable clamp 303 and an adjustment mechanism 302 for adjusting the position of the movable clamp 303. In addition, in order to improve the convenience during use, the first clamp 3 can also adopt an electric clamp in the prior art.

[0049] Optional, such as Figure 7 As shown, the internal thread sleeve 513 and the gear 514 are an integrated structure, and the first clamping block 509 and the sliding arm 510 are an integrated structure.

[0050] Preferably, Figure 5 , Figure 6 , Fig. 9 As shown, the second clamping block 508 is in a corner shape. When the two first clamping blocks 509 respectively abut against the two vertical plates 201 of the arch frame 2, the two second clamping blocks 508 also respectively abut against the two vertical plates 201 of the arch frame 2.

[0051] Preferably, Figure 5 , Fig. 9 As shown, a motor seat 502 is provided in the middle of the beam frame 503, the motor device 511 is fixed in the motor seat 502, a connecting seat 501 is fixed on the motor seat 502, and the connecting seat 501 is connected to the adjustable support arm; this structural design is conducive to improving the compactness of the second clamp 5, making the use of the airport high-altitude lighting maintenance mechanical arm more flexible;

[0052] Furthermore, a driven wheel 516 is fixed on the main shaft 505 , and the driven wheel 516 is drivingly connected to the output shaft of the motor device 511 .

[0053] Preferably, Figure 5 , Fig. 9 As shown, one or more partitions 517 are provided in the middle of the beam frame 503, and the partitions 517 are provided with through holes for the main shaft 505 and the guide rod 506 to pass through. Therefore, the partitions 517 can provide further support for the guide rod 506 and the main shaft 505 to ensure the working stability of the guide rod 506 and the main shaft 505.

[0054] Preferably, Figure 7 , Figure 8 As shown, the sliding arm 510 has an axial hole 521 therein, the telescopic rod 518 passes through the axial hole 521 and the two are slidably matched; the second clamping block 508 is located on the side of the first clamping block 509 away from the beam frame 503.

[0055] Preferably, Figure 3 , Figure 5 As shown, the beam frame 503 is in a trough shape, with end plates 504 at both ends; the guide rod 506 and the main shaft 505 are located inside the beam frame 503, and the guide rod 506 and the main shaft 505 are supported by the end plates 504;

[0056] Furthermore, a detachable cover plate 507 is installed on the beam frame 503 to facilitate maintenance of the internal structure.

[0057] Unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0058] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0059] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

Claims

1. An airport high-altitude lighting maintenance mechanical arm, comprising a first clamp and a second clamp connected via an adjustable support arm, characterized in that: The second clamp includes a beam frame and two adaptive clamping mechanisms; a guide rod, a main shaft and a motor device driving the main shaft to rotate are fixed on the beam frame, the guide rod is parallel to the main shaft, and two external thread sections are provided on the main shaft; the adaptive clamping mechanism includes a sliding arm and a telescopic rod; a guide hole is provided at one end of the sliding arm, and at the same time, an internal thread sleeve is fixed to the end of the sliding arm through an axle seat, a gear is fixed to the internal thread sleeve, and a first corner-shaped clamping block is fixed to the other end of the sliding arm; the telescopic rod is slidably fixed to the sliding arm and can move axially, and one end of the telescopic rod is a rack portion, which meshes with the gear, and the telescopic rod The other end of the cam is fixed with a second clamping block that cooperates with the first clamping block; the guide hole is sleeved on the guide rod and the two are slidably matched; the two internal threaded sleeves are sleeved on the main shaft and respectively cooperate with an external threaded section; during the rotation of the main shaft, the two internal threaded sleeves preferentially produce axial movement to drive the adaptive clamping mechanism to slide, and after the adaptive clamping mechanism slides until it cannot slide, the two internal threaded sleeves rotate synchronously with the main shaft; when the main shaft rotates in one direction, the two sliding arms move closer to the middle, and the two first clamping blocks can respectively abut against the two vertical plates of the bow frame, and then the second clamping block approaches the corresponding first clamping block and can clamp the corresponding vertical plate.

2. The airport high altitude lighting maintenance mechanical arm according to claim 1 is characterized by: A damping sleeve for increasing the movement resistance of the telescopic rod is installed on the sliding arm.

3. The airport high altitude lighting maintenance mechanical arm according to claim 1 is characterized by: The internal thread sleeve and the gear are an integrated structure, and the first clamping block and the sliding arm are an integrated structure.

4. The airport high altitude lighting maintenance mechanical arm according to claim 1 is characterized by: The second clamping block is in a corner shape. When the two first clamping blocks respectively abut against the two vertical plates of the arch frame, the two second clamping blocks also respectively abut against the two vertical plates of the arch frame.

5. The airport high altitude lighting maintenance mechanical arm according to claim 1 is characterized by: A motor seat is provided in the middle of the beam frame, the motor device is fixed in the motor seat, a connecting seat is fixed on the motor seat, and the connecting seat is connected to the adjustable support arm.

6. The airport high altitude lighting maintenance mechanical arm according to claim 5, characterized in that: A driven wheel is fixed on the main shaft, and the driven wheel is drivingly connected to the output shaft of the motor device.

7. The airport high altitude lighting maintenance mechanical arm according to claim 1 is characterized by: One or more partitions are arranged in the middle of the beam frame, and through holes are opened on the partitions for the main shaft and the guide rod to pass through.

8. The airport high altitude lighting maintenance mechanical arm according to claim 1, characterized in that: An axial hole is provided inside the sliding arm, and the telescopic rod passes through the axial hole and the two are slidably matched; the second clamping block is located on a side of the first clamping block away from the beam frame.

9. The airport high altitude lighting maintenance mechanical arm according to claim 1, characterized in that: The beam frame is in a trough shape, with end plates at both ends; the guide rod and the main shaft are located inside the beam frame, and the guide rod and the main shaft are supported by the end plates.

10. The airport high altitude lighting maintenance mechanical arm according to claim 9, characterized in that: A detachable cover plate is installed on the beam frame.

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