Aircraft engine maintenance work ladder

Abstract

An aircraft engine maintenance work ladder comprises a retractable base, a retractable ladder frame hinged on the retractable base, a lifting and adjusting mechanism connected to the retractable base at one end and connected to the retractable ladder frame at the other end, and a working platform installed on the retractable ladder frame; the retractable base comprises a first base provided with a slide slot and a second base provided with a slide rail; the retractable ladder frame comprises a first ladder frame provided with a slide slot and a second ladder frame provided with a slide rail, and the first ladder frame is hinged on the first base; the working platform comprises a first working platform hinged on the second ladder frame and a second working platform installed on the first working platform, and a reinforcing diagonal brace is detachably installed between the first working platform and the second ladder frame; one end of the lifting and adjusting mechanism is installed on the second ladder frame and the other end is installed on the second base. The base of the work ladder is retractable and adjustable, the height is liftable and adjustable, a positioning mechanism is provided to ensure stability, and the operation is convenient and the applicability is strong.

Description

Technical Field

[0001] The invention relates to the field of aircraft engine maintenance equipment, in particular to an aircraft engine maintenance work ladder. Background Art

[0002] In the aircraft engine maintenance work at various HNA bases, work ladders are used very frequently. When repairing engines, maintenance personnel are required to get as close to the target area as possible. However, due to their special shape and narrow space, the highest point inside the engine and the hanger area make it difficult for commonly used ladder racks to meet their requirements in the face of diverse use environments. For example, it is difficult to adjust the floor space of the work ladder, the inclination angle and lifting height of the ladder rack, the length and width of the work area, and it is also difficult to ensure the stability of the work ladder. If you are not careful, it will scratch important engine parts, and the safety of workers' aerial operations cannot be guaranteed. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings and deficiencies in the prior art and to provide an aircraft engine maintenance work ladder, the base of which can be telescopically adjusted, the height can be raised and lowered, a positioning mechanism is provided to ensure stability, the operation is convenient, and the applicability is strong.

[0004] In order to achieve the above objectives, this case is implemented through the following technical solutions:

[0005] A work ladder for aircraft engine maintenance comprises a retractable base, a retractable ladder frame hinged on the retractable base, a lifting and adjusting mechanism connected to the retractable base at one end and connected to the retractable ladder frame at the other end, and a working platform installed on the retractable ladder frame; the retractable base comprises a first base provided with a slide groove and a second base provided with a slide rail; the retractable ladder frame comprises a first ladder frame provided with a slide groove and a second ladder frame provided with a slide rail, the first ladder frame being hinged on the first base; the working platform comprises a first working platform hinged on the second ladder frame and a second working platform superimposed on the first working platform, a reinforcing diagonal brace being detachably installed between the first working platform and the second ladder frame; one end of the lifting and adjusting mechanism is installed on the second ladder frame, and the other end is installed on the second base.

[0006] Furthermore, the lifting and adjusting mechanism includes a T-shaped connecting rod and a limit seat; the T-shaped connecting rod includes a vertical rod and a horizontal rod, and the vertical rod of the T-shaped connecting rod is hinged on the second ladder frame; the limit seat is fixedly installed on the second base, and the upper surface of the limit seat is provided with bevel teeth, and the horizontal rod of the T-shaped connecting rod is horizontally mounted on the limit seat and against the bevel teeth.

[0007] Furthermore, a positioning mechanism is respectively provided on the first base and the second base, and the positioning mechanism includes a screw, a hand wheel is provided at the upper end of the screw, and an anti-slip seat is provided at the lower end of the screw. The screw is rotatably mounted on the first base and the second base through a shaft sleeve.

[0008] Furthermore, the second working platform is hinged to an end of the first working platform that is not connected to the second ladder frame through a limiting hinge seat.

[0009] Furthermore, the limit hinge seat limits the maximum flipping of the second working platform to 180 degrees.

[0010] Furthermore, a pair of reinforcing support mechanisms are symmetrically arranged on the edges of both sides of the first working platform; the reinforcing support mechanism includes a snap-fitting groove plate, an L-shaped support plate and a push-pull curved rod; the snap-fitting groove plate is hinged on the edges of both sides of the first working platform; the L-shaped support plate extends from the bottom plate of the snap-fitting groove plate and is integrated with the snap-fitting groove plate; the push-pull curved rod is fixed on the top of the snap-fitting groove plate and is arranged at 90 degrees to the snap-fitting groove plate in the horizontal plane direction.

[0011] Preferably, the push-pull curved rod is overall in a hook shape.

[0012] Preferably, guardrails are installed on both sides of the first working platform.

[0013] Preferably, the first base and the second base are respectively provided with running wheels.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. It is equipped with a retractable base, suitable for special space scenes;

[0016] 2. A positioning mechanism is provided to position the working ladder on the ground to ensure stability;

[0017] 3. A lifting mechanism is provided to make the lifting height of the second ladder rack adjustable, with good applicability;

[0018] 4. There are two working platforms, the working space can be extended, and the second working platform has a special reinforced support mechanism to ensure its stability, effectively ensuring the safety of aerial operations;

[0019] 5. The operations of base telescopic adjustment, base positioning, ladder frame lifting adjustment, and activation of the second working platform are relatively convenient and easy to use.

[0020] In order to more clearly understand the present invention, preferred embodiments of the present invention will be described below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1It is a schematic structural diagram of the side view of the present invention;

[0022] Figure 2 , Figure 3 It is a schematic diagram of the three-dimensional structure of the present invention;

[0023] Figure 4 It is a schematic diagram of the installation of the first working platform and the second working platform of the present invention;

[0024] Figure 5 It is a schematic diagram of the working principle of the reinforcing support mechanism of the present invention;

[0025] Figure 6 It is a structural schematic diagram of the reinforcing support mechanism of the present invention. DETAILED DESCRIPTION

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0027] In addition, if there are terms such as "first" and "second", they are only used for descriptive purposes, mainly to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components, and cannot be understood as indicating or implying relative importance.

[0028] Please also see Figures 1 to 6 , an aircraft engine maintenance work ladder, comprising a retractable base 1, a retractable ladder frame 2 hinged on the retractable base 1, a lifting and adjusting mechanism 3 connected to the retractable base 1 at one end and connected to the retractable ladder frame 2 at the other end, and a working platform 4 installed on the retractable ladder frame 2. The retractable base 1 comprises a first base 11 provided with a slide groove, and a second base 12 provided with a slide rail; the retractable ladder frame 2 comprises a first ladder frame 21 provided with a slide groove, and a second ladder frame 22 provided with a slide rail, and the first ladder frame 21 is hinged on the first base 11; the working platform 4 comprises a first working platform 41 provided on the second ladder frame 22, and a second working platform 42 superimposed on the first working platform 41; the lifting and adjusting mechanism 3 is installed on the second ladder frame 22 at one end, and installed on the second base 12 at the other end.

[0029] Furthermore, a positioning mechanism 5 is provided on the first base 11 and the second base 12, respectively. The positioning mechanism 5 includes a screw 51, a hand wheel 52 is provided on the upper end of the screw 51, and an anti-skid seat 53 is provided on the lower end of the screw 51. The screw 51 is rotatably mounted on the first base 11 and the second base 12 through a sleeve. Under the common guidance of the slide groove of the first base 11 and the slide rail of the second base 12, the overall length of the retractable base 1 is adjustable. In actual engine maintenance work, the telescopic amount can be adjusted according to the size of the available site area, and then the hand wheel 52 is turned, and the screw 51 drives the anti-skid seat 53 downward and against the ground, so that the first base 11 and the second base 12 are positioned, ensuring the stability of the work ladder. At the same time, walking wheels 6 are also provided on the first base 11 and the second base 12, respectively, to enhance the mobility of the work ladder.

[0030] Furthermore, the lifting and adjusting mechanism 3 includes a T-shaped connecting rod 31 and a limit seat 32; the T-shaped connecting rod 31 includes a vertical rod and a horizontal rod, the vertical rod of the T-shaped connecting rod 31 is hinged on the second ladder frame 22, and the horizontal rod of the T-shaped connecting rod 31 is against the limit seat 32; the limit seat 32 is fixedly installed on the second base 12, and the upper surface of the limit seat 32 is aligned with two rows of bevel teeth 33, and the horizontal rod of the T-shaped connecting rod 31 is horizontally mounted on the limit seat 32 and against the bevel teeth 33. Under the common guidance of the slide groove of the first ladder frame 21 and the slide rail of the second ladder frame 22, the lifting length of the second ladder frame 22 is adjustable; when the second ladder frame 22 rises, the upper end of the vertical rod of the T-shaped connecting rod 31 is driven to rise, and the cross bar of the T-shaped connecting rod 31 slides between different inclined teeth 33 and finally locks in a certain inclined tooth 33, thereby connecting the retractable base 1, the retractable ladder frame 2 and the T-shaped connecting rod 31 into a stable triangular support structure, achieving the effect of adjusting the lifting of the second ladder frame 22. When the second ladder frame 22 needs to be lowered, it is only necessary to manually pull up the T-shaped connecting rod 31 to disengage the cross bar of the T-shaped connecting rod 31 from the inclined teeth 33 on the limit seat 32, and the second ladder frame 22 can be lowered to the required height.

[0031] Furthermore, the first working platform 41 is hinged on the top of the second ladder frame 22, and a reinforcing brace 43 is detachably installed between the first working platform 41 and the second ladder frame 22, so that the first working platform 41, the second ladder frame 22 and the reinforcing brace 43 form a stable triangular support structure. In actual use, since the inclination angle of the telescopic ladder frame 2 may be different, the first working platform 41 may not always remain horizontal, so the reinforcing brace 43 is designed to be detachable. When the first working platform 41 is in a non-horizontal state, it is only necessary to replace and install reinforcing braces 43 of different lengths to ensure that the first working platform 41 is level, effectively ensuring the safety of workers' aerial operations. At the same time, guardrails 44 are also installed on both sides of the first working platform 41 to further ensure the safety of aerial operations.

[0032] Furthermore, the second working platform 42 is hinged to the end of the first working platform 41 that is not connected to the second ladder frame 22, so that the second working platform 42 can be flipped and placed on the first working platform 41; and the second working platform 42 is hinged to the first working platform 41 through a limit hinge 45, and the limit hinge 45 limits the maximum flipping of the second working platform 42 to 180 degrees, so that when the second working platform 42 is flipped to the outside of the first working platform 41, the second working platform 42 and the first working platform 41 are at the same level.

[0033] In order to further ensure the stability of the second working platform 42, a pair of reinforcing support mechanisms 7 are symmetrically arranged on the edges of both sides of the first working platform 41 to support the second working platform 42 from the bottom.

[0034] The reinforcing support mechanism 7 comprises a snap-fitting groove plate 71, an L-shaped support plate 72 and a push-pull curved rod 73; the snap-fitting groove plate 71 is hinged on the edges of both sides of the first working platform 41, and when a person standing on the first working platform 41 pulls the push-pull curved rod 73, the snap-fitting groove plate 71 rotates and snaps on the side edges of the first working platform 41; the L-shaped support plate 72 extends from the bottom plate of the snap-fitting groove plate 71 and is integrated with the snap-fitting groove plate 71, and when the snap-fitting groove plate 71 snaps on the side edges of the first working platform 41, the elbow of the L-shaped support plate 72 extends into the bottom of the second working platform 42 and supports the second working platform 42, thereby further ensuring the stability of the second working platform 42. The push-pull curved rod 73 is fixed on the top of the snap-fitting groove plate 71 and is arranged at 90 degrees with the snap-fitting groove plate 71 in the horizontal plane direction, and the push-pull curved rod 73 is hook-shaped as a whole. When the buckling groove plates 71 are buckled on both side edges of the first working platform 41, a pair of push-pull curved rods 73 form a handrail at the hinge between the first working platform 41 and the second working platform 42. After the two push-pull curved rods 73 are bound together with ropes or buckles, the buckling groove plates 71 will not be able to rotate outward, thereby ensuring that the elbow of the L-shaped support plate 72 remains at the bottom of the second working platform 42, and safety is further guaranteed.

[0035] Compared with the prior art, the beneficial effects of the present invention are as follows: a retractable base 1 is provided, which is suitable for special space scenes; a positioning mechanism 5 is provided, which can position the work ladder on the ground to ensure stability; a lifting mechanism is provided, so that the lifting height of the second ladder frame 22 is adjustable, and the applicability is good; two working platforms 4 are provided, the working space can be extended, and the second working platform 42 has a special reinforced support mechanism 7 to ensure its stability, effectively ensuring the safety of aerial operations; the operations of base telescopic adjustment, base positioning, ladder frame lifting adjustment, and activation of the second working platform 42 are relatively convenient and easy to use.

[0036] The above-mentioned embodiments only express several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. An aircraft engine maintenance work ladder, characterized in that: It includes a retractable base, a retractable ladder frame hinged on the retractable base, a lifting and adjusting mechanism with one end connected to the retractable base and the other end connected to the retractable ladder frame, and a working platform installed on the retractable ladder frame; the retractable base includes a first base provided with a slide groove and a second base provided with a slide rail; the retractable ladder frame includes a first ladder frame provided with a slide groove and a second ladder frame provided with a slide rail, and the first ladder frame is hinged on the first base; the working platform includes a first working platform hinged on the second ladder frame and a second working platform superimposed and installed on the first working platform, and a reinforcing diagonal brace is detachably installed between the first working platform and the second ladder frame; one end of the lifting and adjusting mechanism is installed on the second ladder frame, and the other end is installed on the second base; The lifting and lowering adjustment mechanism comprises a T-shaped connecting rod and a limit seat; the T-shaped connecting rod comprises a vertical rod and a horizontal rod, and the vertical rod of the T-shaped connecting rod is hinged on the second ladder frame; the limit seat is fixedly mounted on the second base, and the upper surface of the limit seat is provided with oblique teeth, and the horizontal rod of the T-shaped connecting rod is horizontally mounted on the limit seat and abuts against the oblique teeth; The first base and the second base are respectively provided with a positioning mechanism, the positioning mechanism comprising a screw, a hand wheel is provided at the upper end of the screw, and an anti-slip seat is provided at the lower end of the screw, and the screw is rotatably mounted on the first base and the second base through a shaft sleeve; A pair of reinforcing support mechanisms are also symmetrically arranged on the edges of both sides of the first working platform; the reinforcing support mechanism includes a snap-fit ​​groove plate, an L-shaped support plate and a push-pull curved rod; the snap-fit ​​groove plate is hinged on the edges of both sides of the first working platform; the L-shaped support plate extends from the bottom plate of the snap-fit ​​groove plate and is integrated with the snap-fit ​​groove plate; the push-pull curved rod is fixed on the top of the snap-fit ​​groove plate and is arranged at 90 degrees to the snap-fit ​​groove plate in the horizontal plane direction.

2. An aircraft engine maintenance work ladder according to claim 1, characterized in that: The second working platform is hinged to the end of the first working platform that is not connected to the second ladder frame through a limiting hinge seat.

3. An aircraft engine maintenance work ladder according to claim 2, characterized in that: The limit hinge seat limits the maximum turning of the second working platform to 180 degrees.

4. The aircraft engine maintenance work ladder according to claim 1, characterized in that: The push-pull curved rod is in a hook shape as a whole.

5. The aircraft engine maintenance work ladder according to claim 1, characterized in that: Guardrails are also installed on both sides of the first working platform.

6. The aircraft engine maintenance work ladder according to claim 1, characterized in that: The first base and the second base are respectively provided with running wheels.

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