Ladder assembly applied to airplane back maintenance

Abstract

The ladder assembly comprises a base, a supporting block is fixedly installed in the base, two sets of supporting rods are hinged to the upper surface of the supporting block, a climbing structure is arranged between the two sets of supporting rods, connecting rings are fixedly installed at the ends, away from the supporting block, of the supporting rods, and a pedal device is arranged between the two sets of connecting rings. First fixing bolts are slidably connected to the tops of the connecting rings, first hydraulic push rods are hinged between the outer walls of the two sides of the supporting rods and the base, and walking wheels are fixedly installed at the bottom of the base. The pedal device composed of the box body, the pedal and the like is designed on the ladder assembly applied to aircraft back maintenance, and a climbing structure is matched, so that the problems that after a traditional maintenance ladder assembly is fixed, due to the fact that the ladder angle is fixed, when multiple sets of aircrafts are maintained, the maintenance angle is inconvenient to adjust, and the maintenance cost is low are solved. And meanwhile, the maintenance efficiency of the airplane is also improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ladder racks, in particular to a ladder rack used for aircraft back maintenance. Background Art

[0002] An airplane (aeroplane, airplane) is a heavier-than-air aircraft that flies in the atmosphere with a power unit that has one or more engines to generate forward thrust or pull, and the fixed wings of the fuselage to generate lift. Airplanes are the most common type of fixed-wing aircraft, and can be divided into jet aircraft and propeller aircraft according to the type of engine they use. It is inevitable that some faults will occur during a long period of flight in the air. Aircraft maintenance is a job that includes repair, assembly and debugging of aircraft body structure and accessories, aircraft test flight and fault diagnosis and troubleshooting, aircraft repair technical management, aircraft field maintenance and other work contents.

[0003] Maintenance ladders are often needed in aircraft maintenance. After being fixed, traditional maintenance ladders have a fixed ladder angle. When multiple aircraft are being maintained, if the maintenance direction of the staff is to be adjusted, the user can only climb down the ladder and rotate and move the maintenance ladder as a whole to the required position so that the pedals are located on the back of the aircraft again. The use process is very inconvenient.

[0004] Therefore, in view of the above problems, we propose a ladder rack for aircraft back maintenance. Utility Model Content

[0005] The utility model aims to provide a ladder frame for aircraft back maintenance to solve the problems raised by the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a ladder for aircraft back maintenance, comprising a base, a support block fixedly installed inside the base, two groups of support rods hinged on the upper surface of the support block, a climbing structure is arranged between the two groups of support rods, a connecting ring is fixedly installed on the end of the support rod away from the support block, a pedal device is arranged between the two groups of connecting rings, a first fixing pin is slidably connected to the top of the connecting ring, a first hydraulic push rod is hinged between the outer walls on both sides of the support rod and the base, and walking wheels are fixedly installed on the bottom of the base.

[0007] As a further description of the utility model: the pedal device includes a box body, a groove is provided on the upper surface of the box body, a counterweight block is installed at the bottom of the box body, two sets of connecting seats are fixedly installed on the top of the box body, and a connecting shaft is fixedly installed on one end of the connecting seat close to the connecting ring.

[0008] As a further description of the utility model: pedals are hinged on both sides of the box, two sets of armrests are fixedly installed on the upper surface of the pedals, a second fixed pin is slidably connected between the pedals and the box, a second socket matched with the second fixed pin is provided inside the pedal and the box, and two ends of the second fixed pin are respectively located on the pedal and inside the box.

[0009] As a further description of the present invention: the outer diameter of the connecting shaft matches the inner diameter of the connecting ring, the connecting shaft is rotatably connected to the connecting ring, and the connecting shaft is provided with a plurality of first jacks matched with the first fixing pins.

[0010] As a further description of the utility model: the climbing structure includes an escalator, and guide blocks are fixedly installed on the outer walls on both sides of the escalator close to the support rods, and guide grooves adapted to the guide blocks are opened on the side walls of the two groups of support rods close to each other.

[0011] As a further description of the utility model: a second hydraulic push rod is fixedly installed at the bottom of the escalator, and one end of the second hydraulic push rod away from the escalator is hinged to the support block.

[0012] As a further description of the present utility model: the number of the first hydraulic push rods is four groups, the two ends of the first hydraulic push rods are respectively hinged to the support rods and the base, the number of the walking wheels is four groups, and they are distributed at the four corners of the bottom of the base.

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

[0014] The utility model designs a pedal device consisting of a box body and pedals on a ladder frame used for aircraft back maintenance, and cooperates with a climbing structure. When in use, a first hydraulic push rod can drive two groups of support rods to tilt left and right, drive the pedals to be located at the back of the aircraft, and then start the second hydraulic push rod to drive the escalator to move up and down between the two groups of support rods. Maintenance personnel can climb to the box body through the escalator, and fix the angle of the box body through the first fixed pin. When maintenance is performed, the pedal can be rotated around the box body to make the pedal and the box body horizontal, and the angle of the pedal is fixed by the second fixed pin. After that, the maintenance personnel can squat on the pedal to perform maintenance on the aircraft, thereby reducing the problem that the traditional maintenance ladder frame has a fixed angle of the ladder after being fixed, which makes it inconvenient to adjust the maintenance angle when maintaining multiple groups of aircraft, and the use process is very inconvenient, and at the same time, the maintenance efficiency of the aircraft is also improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the structure of two groups of support rods of the utility model;

[0017] Figure 3 This is a schematic diagram of the pedal device structure of the utility model;

[0018] Figure 4 It is a schematic diagram of the climbing structure of the utility model.

[0019] In the figure: 1. base; 2. support block; 3. support rod; 4. climbing structure; 401. escalator; 402. guide block; 403. second hydraulic push rod; 5. connecting ring; 6. pedal device; 601. box; 602. connecting seat; 603. connecting shaft; 604. pedal; 605. handrail; 606. second fixing pin; 7. first fixing pin; 8. first hydraulic push rod; 9. walking wheel. DETAILED DESCRIPTION

[0020] 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.

[0021] See also Figure 1-Figure 4 The utility model provides a technical solution: a ladder used for aircraft back maintenance, comprising a base 1, a support block 2 is fixedly installed inside the base 1, two groups of support rods 3 are hinged on the upper surface of the support block 2, a climbing structure 4 is arranged between the two groups of support rods 3, a connecting ring 5 is fixedly installed on one end of the support rod 3 away from the support block 2, a pedal device 6 is arranged between the two groups of connecting rings 5, a first fixing pin 7 is slidably connected to the top of the connecting ring 5, a first hydraulic push rod 8 is hinged between the outer walls on both sides of the support rod 3 and the base 1, and a walking wheel 9 is fixedly installed on the bottom of the base 1.

[0022] In this embodiment: the pedal device 6 includes a box body 601, a groove is provided on the upper surface of the box body 601, a counterweight block is installed at the bottom of the box body 601, two sets of connecting seats 602 are fixedly installed on the top of the box body 601, and a connecting shaft 603 is fixedly installed on one end of the connecting seat 602 close to the connecting ring 5.

[0023] During specific use: the box body 601 can rotate around the connecting ring 5 through the connecting shaft 603. Since a counterweight block is installed at the bottom of the box body 601 and the weight of the maintenance personnel during the maintenance process is added, the box body 601 can be kept level during the movement.

[0024] In this embodiment: pedals 604 are hinged on both sides of the box 601, two sets of armrests 605 are fixedly installed on the upper surface of the pedals 604, a second fixed pin 606 is slidably connected between the pedals 604 and the box 601, and second sockets compatible with the second fixed pin 606 are provided inside the pedals 604 and the box 601, and both ends of the second fixed pin 606 are respectively located inside the pedals 604 and the box 601.

[0025] During specific use: the pedal 604 can be rotated around the box 601 for easy storage, and can be fixed by the second fixing pin 606 during use, so as to facilitate the maintenance of the aircraft by the staff.

[0026] In this embodiment, the outer diameter of the connecting shaft 603 matches the inner diameter of the connecting ring 5 , the connecting shaft 603 is rotatably connected to the connecting ring 5 , and the connecting shaft 603 is provided with a plurality of first plug holes matched with the first fixing pins 7 .

[0027] During specific use: the first fixing pin 7 can be inserted into the first plug hole opened inside the connecting shaft 603 to fix the angle between the box body 601 and the connecting ring 5 to prevent the box body 601 from rotating due to the change of the center of gravity during the maintenance process, making the maintenance personnel unstable.

[0028] In this embodiment: the climbing structure 4 includes an escalator 401, and guide blocks 402 are fixedly installed on the outer walls of both sides of the escalator 401 close to the support rods 3, and guide grooves adapted to the guide blocks 402 are opened on the side walls of the two groups of support rods 3 close to each other.

[0029] During specific use, maintenance personnel can climb up to the box 601 via the escalator 401 , and the escalator 401 can move up and down between the two groups of support rods 3 via the guide block 402 to avoid the situation where the escalator 401 blocks the box 601 .

[0030] In this embodiment: a second hydraulic push rod 403 is fixedly installed at the bottom of the escalator 401 , and one end of the second hydraulic push rod 403 away from the escalator 401 is hinged to the support block 2 .

[0031] During specific use: the second hydraulic push rod 403 can provide stable power for the escalator 401 to move up and down.

[0032] In this embodiment: the number of the first hydraulic push rods 8 is four groups, the two ends of the first hydraulic push rods 8 are respectively hinged to the support rod 3 and the base 1, the number of the walking wheels 9 is four groups, and they are distributed at the four corners of the bottom of the base 1.

[0033] During specific use: the first hydraulic push rod 8 can adjust the angle of the two groups of support rods 3, and then adjust the angle of the escalator 401, so that the maintenance ladder frame can adjust the maintenance direction without rotating during use, and a locking structure is installed on the walking wheel 9.

[0034] Working principle: When in use, the device is pushed to the space between two aircrafts that need to be inspected through the running wheels 9, and the first hydraulic push rod 8 is started. The first hydraulic push rod 8 drives the two groups of support rods 3 to tilt toward one of the aircrafts, so that the pedal 604 is located on the back of the aircraft. Then the second hydraulic push rod 403 can be started to drive the escalator 401 to move upward between the two groups of support rods 3 until the top of the escalator 401 contacts the box 601. The maintenance personnel can climb to the box 601 through the escalator 401, and insert the first fixing pin 7 into the connecting ring 5 and the connecting shaft 603 to fix the angle of the box 601. Then the inspection personnel climb into the box 601, and rotate the pedal 604 around the box 601 to make the pedal 604 level with the box 601, and insert the second fixing pin 606 into the pedal 604. and box 601, to fix the angle of pedal 604, and then the maintenance personnel can squat on pedal 604 to maintain the aircraft. When one of the aircraft is maintained, the maintenance personnel can squat inside box 601, pull out the first fixing pin 7, and start the first hydraulic push rod 8 again to tilt the support rod 3 toward the other aircraft. Since a counterweight block is installed at the bottom of box 601 plus the weight of the maintenance personnel, the box 601 always keeps the support rod 3 horizontal during the rotation. Then, the box 601 can be rotated to the back of another aircraft according to the above steps, thereby reducing the problem that the traditional maintenance ladder rack is inconvenient to adjust the maintenance angle when maintaining multiple groups of aircraft due to the fixed angle of the escalator 401, and the use process is inconvenient, while also improving the maintenance efficiency of the aircraft.

[0035] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in the field. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for technical personnel in the field to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A ladder frame for aircraft back maintenance, comprising a base (1), characterized in that: A support block (2) is fixedly installed inside the base (1), two groups of support rods (3) are hinged on the upper surface of the support block (2), a climbing structure (4) is arranged between the two groups of support rods (3), a connecting ring (5) is fixedly installed at one end of the support rod (3) away from the support block (2), a pedal device (6) is arranged between the two groups of connecting rings (5), a first fixed pin (7) is slidably connected to the top of the connecting ring (5), a first hydraulic push rod (8) is hinged between the outer walls of both sides of the support rod (3) and the base (1), a walking wheel (9) is fixedly installed at the bottom of the base (1), the pedal device (6) comprises a box body (601), a groove is provided on the upper surface of the box body (601), a counterweight block is installed at the bottom of the box body (601), and two groups of connecting seats (602) are fixedly installed on the top of the box body (601). A connecting shaft (603) is fixedly installed at one end of the connecting seat (602) close to the connecting ring (5); pedals (604) are hinged on both sides of the box (601); two groups of handrails (605) are fixedly installed on the upper surface of the pedal (604); a second fixed pin (606) is slidably connected between the pedal (604) and the box (601); a second plug hole matched with the second fixed pin (606) is provided inside the pedal (604) and the box (601); two ends of the second fixed pin (606) are respectively located inside the pedal (604) and the box (601); the number of the first hydraulic push rods (8) is four groups; the two ends of the first hydraulic push rods (8) are respectively hinged to the support rod (3) and the base (1); the number of the walking wheels (9) is four groups, and they are distributed at the four corners of the bottom of the base (1).

2. The ladder used for aircraft back maintenance according to claim 1, characterized in that: The outer diameter of the connecting shaft (603) matches the inner diameter of the connecting ring (5); the connecting shaft (603) is rotatably connected to the connecting ring (5); and the connecting shaft (603) is provided with a plurality of first plug holes adapted to match the first fixing pins (7).

3. The ladder used for aircraft back maintenance according to claim 1, characterized in that: The climbing structure (4) comprises an escalator (401), and guide blocks (402) are fixedly installed on the outer walls of both sides of the escalator (401) close to the support rods (3), and guide grooves adapted to the guide blocks (402) are provided on the side walls of the two groups of support rods (3) close to each other.

4. The ladder used for aircraft back maintenance according to claim 3, characterized in that: A second hydraulic push rod (403) is fixedly installed at the bottom of the escalator (401), and one end of the second hydraulic push rod (403) away from the escalator (401) is hinged to the support block (2).

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