CN111502527A

CN111502527A - Aircraft engine maintenance work ladder

Info

Publication number: CN111502527A
Application number: CN202010274566.9A
Authority: CN
Inventors: 梁健波; 伍晖; 黄志堃; 高智扬
Original assignee: Guangzhou Aircraft Maintenance Engineering Co Ltd
Current assignee: Guangzhou Aircraft Maintenance Engineering Co Ltd
Priority date: 2020-04-09
Filing date: 2020-04-09
Publication date: 2020-08-07

Abstract

The invention provides an aircraft engine maintenance work ladder, comprising: the underframe of a steel structure comprises a horizontal truss and a vertical truss fixed at one end of the horizontal truss, and the outer ends of the horizontal truss and the vertical truss are provided with support legs which extend downwards and are provided with universal wheels at the bottoms; the main ladder is a vertical truss with a convex platform at the top; the main ladder is arranged in the vertical truss of the underframe, the convex part of the convex platform faces the other end of the horizontal truss, and the movement of the main ladder in the horizontal direction is limited by 8V-shaped guide wheels; a lifting driving mechanism is arranged between the main ladder and the underframe to realize the up-and-down movement of the main ladder; the outer end of the vertical truss of the underframe is also fixedly provided with an inclined ladder which faces the convex platform of the main ladder, and the side surface of the main ladder, which corresponds to the inclined ladder, is fixedly provided with a vertical ladder to the convex platform; two auxiliary lifting platforms are also arranged on the horizontal truss of the underframe. The height of the maintenance work ladder is adjustable, and the maintenance work ladder can be applied to airplanes of multiple types.

Description

Aircraft engine maintenance work ladder

Technical Field

The invention relates to an aircraft engine maintenance work ladder.

Background

When the airplane is subjected to regular inspection, the engine needs to be detached for maintenance work, and the engine is hung on the engine hanging bracket after the maintenance work is finished. In the dismouting in-process, the worker need be close two hoisting points on the gallows and carry out work, need use the ladder frame this moment. However, because the engine bracket used in assembling and disassembling the engine is arranged below the engine, the support legs extending out of the bracket can not enable the existing ladder frame to be pushed close.

The existing airplane engine maintenance work ladder has the following defects: 1. the existing engine maintenance working ladder has an oversized bottom frame and cannot avoid the pushing of support feet of a bracket against an airplane; 2. the front and rear hoisting points of the engine are different in height, the existing working ladder is only provided with one platform, the front and rear hoisting points cannot work simultaneously, and the working efficiency is limited.

Disclosure of Invention

The invention aims to solve the technical problem of providing an aircraft engine maintenance work ladder, which can solve the problem that personnel are difficult to access during aircraft engine maintenance and help the workers to more effectively perform aircraft maintenance work.

To solve the technical problems, the technical scheme adopted by the invention is as follows:

an aircraft engine maintenance work ladder, characterized by includes:

the underframe of a steel structure comprises a horizontal truss and a vertical truss fixed at one end of the horizontal truss, the outer ends of the horizontal truss and the vertical truss are provided with support legs which extend downwards and are provided with universal wheels at the bottoms, four outer vertical guide rails are arranged in the vertical truss, and four inward V-shaped guide wheels are fixed at the upper part of the outer vertical guide rails;

the main ladder is a vertical truss the top of which is provided with a convex platform, four inner vertical guide rails corresponding to the V-shaped guide rails outside the underframe are arranged outside the vertical truss, and four outward V-shaped guide rails corresponding to the V-shaped guide rails outside the underframe are fixed at the lower part of the inner vertical guide rails;

the main ladder is arranged in the vertical truss of the underframe, the protruding part of the convex platform faces the other end of the horizontal truss, and the movement of the main ladder in the horizontal direction is limited by 8V-shaped guide wheels; a lifting driving mechanism is arranged between the main ladder and the underframe to realize the up-and-down movement of the main ladder;

the outer end of the vertical truss of the underframe is also fixedly provided with an inclined ladder which faces the convex platform of the main ladder, and the side surface of the main ladder, which corresponds to the inclined ladder, is fixedly provided with a vertical ladder to the convex platform;

and two auxiliary lifting platforms are also arranged on the horizontal truss of the underframe.

The front end of the underframe without the vertical truss is narrow, the rear end of the underframe without the vertical truss is wide, and the narrow end width of the underframe without the vertical truss can be pushed into an engine.

On the basis of the above, the present invention may also have various preferred types:

the supplementary lift platform include: the lifting frame comprises a square frame-shaped base, a top horizontal plate, a middle lifting frame and a hydraulic oil cylinder linear driving mechanism; the lifting frame is a pair of double rods hinged from the middle, the double rods are symmetrically arranged, two lower ends in the same direction are respectively hinged to one end of each longitudinal beam of the square frame, and the other two lower ends in the same direction are slidably supported on the slide rails on the two longitudinal beams of the square frame; two upper ends in the same direction are respectively hinged at one end of the bottom surface of the top horizontal plate, and the other two upper ends in the same direction are slidably supported on the slide rail at the bottom surface of the top horizontal plate; the hydraulic cylinder linear driving mechanism is arranged on the base and drives the two slidable lower ends of the lifting frame to move so as to lift the top horizontal plate; the base is fixed on a horizontal truss of the bottom frame.

The lifting driving mechanism is a hydraulic lifting mechanism comprising an oil cylinder and a manual hydraulic pump.

Protruding style of calligraphy platform and lift platform all are provided with and prevent guardrail bar.

The fixed underframe is provided with a ground foot. After the working ladder is pushed away to accomplish, the lower margin is screwed, makes lower margin and ground laminating, and is fixed with the working ladder through frictional force.

The fixed underframe is connected with a towing rod. When the towing rod is hung on the trailer, the working ladder can be conveniently moved for a long distance.

This work ladder opens the inside narrow and small region behind the foreskin according to the engine and carries out the appearance design, simultaneously because the portal frame formula chassis is higher, can avoid engine bracket to impel the engine smoothly, again according to the work area of difference, has set up three lift platform respectively, makes the worker can be close the front and back hoisting point of engine simultaneously to when the aircraft was jacked, also can adjust the height of platform correspondingly, and need not change the ladder.

The invention has the following beneficial effects:

the aircraft engine maintenance working ladder can realize the function of approaching different parts of the aircraft engine and can solve the problem of interference between the engine bracket and the ladder after the engine bracket is put in place. The working ladder has the advantages of light structure, flexible use, adjustable height and the like, so that the working ladder can be applied to airplanes of multiple types.

Drawings

The invention is described in further detail below with reference to the figures and the detailed description.

FIG. 1 is a schematic structural view of an aircraft engine maintenance ladder of the present invention;

the reference numerals refer to: 1-a first auxiliary lifting platform, 2-a second auxiliary lifting platform, 3-a main ladder, 4-an underframe, 5-a lifting frame, 6-a base, 7-a top horizontal plate, 8-a manual hydraulic pump, 9-an oil cylinder, 10-a V-shaped guide wheel, 11-an inclined ladder stand, 12-a towing rod, 13-a straight ladder stand, 14-a ground foot and 15-a universal wheel.

Detailed Description

As shown in fig. 1, the aircraft engine maintenance working ladder is a movable steel structure ladder, and comprises an underframe 4, a main ladder 3 and a first and a second auxiliary lifting platforms. The work ladder is designed into the form that the front end is narrow, and the rear end is wide, and inside the narrow end can impel the engine, the stability of ladder not only can be increased to wide one end, can make the worker be close to the work position of aircraft moreover more.

The underframe 4 is of a steel structure and comprises a horizontal truss and a vertical truss. One end of the horizontal truss is wide, and the other end of the horizontal truss is narrow. The vertical truss is fixed on the wide end of the horizontal truss. The outer ends of the horizontal truss and the vertical truss are provided with downward extending supporting legs with universal wheels 15 at the bottoms, and the working ladder is convenient to move due to the arrangement. Four outer vertical guide rails are arranged in the vertical truss, and four inward V-shaped guide wheels 10 are fixed at the upper parts of the outer vertical guide rails. The bottom space of the underframe 4 is Jiong-shaped, and the height of the bottom space is higher, so that the bottom space can stride over the supporting legs of the engine bracket, and the bottom space can be smoothly pushed into the engine after the foreskin is opened. The underframe 4 is provided with the ground feet 14, and after the work ladder pushed against the aircraft engine, the ground feet 14 were screwed, made ground 14 and ground laminating, fixed the work ladder through frictional force. The underframe 4 is also connected with a towing rod 12, and when the towing rod 12 is hung on a trailer, the working ladder can be conveniently moved for a long distance.

The main ladder 3 is a vertical truss with a convex platform on the top, four inner vertical guide rails corresponding to the V-shaped guide rails 10 of the outer vertical guide rails of the underframe 4 are arranged outside the vertical truss, and four outward V-shaped guide rails 10 corresponding to the outer vertical truss guide rails of the underframe 4 are fixed on the lower portion of the inner vertical guide rails. The main ladder 3 is installed in the vertical truss of the underframe 4, the protruding part of the convex platform faces the other end (narrow end) of the horizontal truss of the underframe 4, and the movement of the main ladder 3 in the horizontal direction is limited by 8V-shaped guide wheels 10. A lifting driving mechanism is arranged between the main ladder 3 and the bottom frame 4 to realize the up-and-down movement of the main ladder 3, and the lifting driving mechanism is a hydraulic lifting mechanism comprising an oil cylinder 9 and a manual hydraulic pump 8.

The two lifting platforms comprise a first auxiliary lifting platform 1 and a second auxiliary lifting platform 2 which are arranged on the narrow end of the horizontal truss of the underframe 4. The lift platform includes: a square frame-shaped base 6, a top horizontal plate 7, a middle lifting frame 5 and a hydraulic oil cylinder linear driving mechanism; the lifting frame 5 is a pair of double rods hinged from the middle, the double rods are symmetrically arranged, two lower ends in the same direction are respectively hinged to one end of two longitudinal beams of the square frame, the other two lower ends in the same direction are slidably supported on slide rails on the two longitudinal beams of the square frame, two upper ends in the same direction are respectively hinged to one end of the bottom surface of the top horizontal plate 7, and the other two upper ends in the same direction are slidably supported on the slide rails on the bottom surface of the top horizontal plate 7; the hydraulic cylinder linear driving mechanism is arranged on the base 6 and drives the two slidable lower ends of the lifting frame 5 to move so as to lift the top horizontal plate 7; the base 6 of the lifting platform is fixed on the horizontal truss of the underframe 4.

The outer end of the vertical truss of the underframe 4 is also fixedly provided with an inclined ladder 11 facing the convex platform of the main ladder 3, and the vertical truss of the main ladder 3 is fixedly provided with a vertical ladder 13 to the convex platform corresponding to the side surface of the inclined ladder 11. The ladder can climb to the convex-shaped platform at the top of the working ladder main body through the inclined ladder 11 and the vertical ladder 13, so that the height of the lifting platform is adjusted to reach the top horizontal plate 7 of the lifting platform. The main ladder 3-shaped platform and the two lifting platforms are provided with protective railings, the protective railings correspond to working positions of front and rear lifting points of an aircraft engine and working positions of rear lifting point lifting appliances in mounting respectively, height adjustment can be carried out respectively according to actual needs, and operators can walk and maintain on the protective railings.

Claims

1. An aircraft engine maintenance work ladder, characterized by includes:

2. An aircraft engine maintenance ladder as claimed in claim 1, wherein said underframe having no vertical truss members has a narrow front end and a wide rear end, the narrow end being capable of being pushed into the engine.

3. An aircraft engine servicing work ladder as claimed in claim 1 or 2, wherein said auxiliary lift platform comprises: the lifting frame comprises a square frame-shaped base, a top horizontal plate, a middle lifting frame and a hydraulic oil cylinder linear driving mechanism; the lifting frame is a pair of double rods hinged from the middle, the double rods are symmetrically arranged, two lower ends in the same direction are respectively hinged to one end of each longitudinal beam of the square frame, and the other two lower ends in the same direction are slidably supported on the slide rails on the two longitudinal beams of the square frame; two upper ends in the same direction are respectively hinged at one end of the bottom surface of the top horizontal plate, and the other two upper ends in the same direction are slidably supported on the slide rail at the bottom surface of the top horizontal plate; the hydraulic cylinder linear driving mechanism is arranged on the base and drives the two slidable lower ends of the lifting frame to move so as to lift the top horizontal plate; the base is fixed on a horizontal truss of the bottom frame.

4. An aircraft engine maintenance work ladder as claimed in claim 3, wherein said lift drive mechanism is a hydraulic lift mechanism comprising a cylinder and a manual hydraulic pump.

5. An aircraft engine maintenance work ladder as claimed in claim 3, wherein the raised platform and the lift platform are provided with guard rails.

6. An aircraft engine servicing work ladder according to claim 3, wherein the fixed chassis is provided with feet.

7. An aircraft engine maintenance work ladder as claimed in claim 3, wherein a tow bar is attached to the fixed chassis.