CN112031635A

CN112031635A - Over-and-under type aircraft maintenance work ladder

Info

Publication number: CN112031635A
Application number: CN202010829686.0A
Authority: CN
Inventors: 梁健波; 黄志堃; 何锡球; 李亮
Original assignee: Guangzhou Aircraft Maintenance Engineering Co Ltd
Current assignee: Guangzhou Aircraft Maintenance Engineering Co Ltd
Priority date: 2020-08-17
Filing date: 2020-08-17
Publication date: 2020-12-04

Abstract

The invention discloses a lifting type airplane maintenance working ladder which comprises an underframe, a workbench, a vertical ladder, a hand-operated lifting mechanism, a manual locking ground foot mechanism and a railing, wherein moving wheels are arranged at the bottom of the underframe, the inclined ladder is arranged in front of the underframe, the workbench is arranged at the top of the underframe through the hand-operated lifting mechanism, the vertical ladder is arranged in front of the workbench, the top of the vertical ladder is fixedly connected with the workbench, the railing is arranged on two side edges of the workbench in a vertically adjustable mode through a railing guide seat, the railing guide seat is provided with a graphite copper sleeve sleeved on the railing, the manual locking ground foot mechanism comprises a handle, a connecting rod mechanism and a locking ground foot, locking ground feet are respectively arranged on two sides of the underframe, the handle is connected with the locking ground feet through the connecting rod mechanism, and the locking ground feet can be driven. The invention can adjust the working height according to the heights of different airplane models and different overhaul positions, has compact structure and can improve the working efficiency.

Description

Over-and-under type aircraft maintenance work ladder

Technical Field

The invention relates to a lifting type airplane maintenance work ladder.

Background

When the flight crew maintains or detects the airplane, the detection and maintenance work can be completed with the help of the working ladder when meeting the places where the normal height of the flight crew can not reach.

However, because the height of the fuselage of the airplane changes with the weight of the airplane, the working ladder with different heights needs to be replaced by the staff according to the working height, which causes the low working efficiency.

The existing airplane maintenance work ladder has the following defects:

1. the existing maintenance work ladder has a heavy structure and cannot enter a narrow working space;

2. the working platform is fixed in height and cannot meet the height requirements of different repair parts on various machine types;

3. the common pull-out movable handrail is easy to be blocked by the sleeve because the ascending speeds of the two sides of the handrail are asynchronous;

4. the hand-operated locking anchor has the disadvantages of low working efficiency and long operation time required during locking or unlocking.

Disclosure of Invention

The invention aims to solve the technical problem of providing a lifting type airplane maintenance work ladder, which can adjust the work height according to the heights of different airplane models and different maintenance positions, has a compact structure, can improve the work efficiency, can avoid the phenomenon of locking when a railing is adjusted up and down, and has simple operation and high operation efficiency of locking a ground foot.

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

the utility model provides a over-and-under type aircraft maintenance work ladder, its includes the chassis, and the bottom of chassis is equipped with removes the wheel, and the preceding inclined ladder that is equipped with of chassis, its characterized in that: the hand-operated lifting mechanism drives the workbench to lift together with the vertical ladder and the railing to lift, the hand-operated locking ground foot mechanism comprises a handle, a connecting rod mechanism and locking ground feet, the locking ground feet are respectively arranged on two sides of the underframe, the locking ground feet can lift up and down, the handle is connected with the locking ground feet through the connecting rod mechanism, the locking ground feet can be driven to lift by operating the handle.

Furthermore, hand formula elevating system includes scissors fork mechanical system, chain, first sprocket, second sprocket and hand wheel, and the workstation is established on scissors fork mechanical system, and first sprocket is established on scissors fork mechanical system's operating axis, and the hand wheel is rotatable to be established at the side of chassis, and the coaxial tip at the hand wheel of establishing of second sprocket, first sprocket and second sprocket pass through the chain and connect.

Furthermore, the railing is provided with vertical upright posts in the vertical direction, the railing guide seat further comprises sleeves vertically fixed on two side edges of the workbench, graphite copper sleeves are respectively arranged at two end parts of a middle hole of each sleeve, the upright posts correspondingly penetrate through the sleeves, the upright posts are in contact with the graphite copper sleeves, and gaps are formed between the upright posts and the hole walls of the middle holes.

Further, aircraft maintenance work ladder still includes the stop pin, is equipped with the locking hole on the sleeve, is equipped with a plurality of regulation holes in the pole setting, and the regulation hole is vertical arranges, and the stop pin passes in locking hole and one of them regulation hole.

Furthermore, the front parts of two sides of the underframe are respectively provided with a locking ground foot, the connecting rod mechanism comprises a connecting shaft and two groups of connecting rods which are respectively arranged corresponding to the locking ground feet on the two sides, the connecting shaft is transversely and rotatably arranged at the bottom of the underframe, two end parts of the connecting shaft are respectively positioned above the locking ground feet on the two sides, the handle is connected with one end of the connecting shaft, and the groups of connecting rods are connected with the locking ground feet and the connecting shaft; the rotation of the connecting shaft is operated through the handle, and the rotation of the connecting shaft drives the locking ground feet to lift through the connecting shaft.

Furthermore, the connecting rod group comprises a swing rod and a connecting rod, the upper end of the swing rod is fixedly connected to the end portion of the connecting shaft and swings along with the rotation of the connecting shaft, the upper end of the connecting rod is hinged to the lower end of the swing rod, and the lower end of the connecting rod is hinged to the upper end of the locking ground foot.

Furthermore, the aircraft maintenance work ladder also comprises a draw bar used for being connected with an external trailer, and the draw bar can be arranged on the side edge of the underframe in a containing mode.

Furthermore, the front side and the rear side of the workbench are respectively provided with a protective chain, and the two ends of the protective chain are respectively connected with the upper parts of the railings at the two sides.

Furthermore, two side edges of the inclined ladder are respectively provided with a guardrail.

Further, the top of chassis is equipped with vertical spacing stand, and the workstation will support when falling to the low point and lean on the upper end at spacing stand.

Compared with the prior art, the invention has the following beneficial effects:

the aircraft maintenance working ladder of the invention is directly provided with the hand-operated lifting mechanism and the working platform at the top of the underframe, has compact structure, enables the aircraft maintenance working ladder to enter the narrow internal space of the aircraft, is convenient for workers to approach the maintenance part,

the workbench installed through the hand-operated lifting mechanism has a lifting function, and the height can be adjusted according to actual working requirements. And hand formula elevating system is manual operation mechanism, compares in fluid pressure type elevating system, has avoided the human cost of later maintenance.

The airplane maintenance working ladder is simple and light in overall design, workers can push the working ladder and change the height of the working ladder by a single person, and working efficiency is greatly improved.

According to the invention, the up-and-down sliding adjustment of the handrail is limited through the graphite copper sleeve, and the graphite copper sleeve can reduce the friction force when the handrail is adjusted in an up-and-down sliding manner, so that the handrail is easier to adjust, and the phenomenon of blocking when the handrail is adjusted in an up-and-down direction is avoided.

According to the invention, the handle and the locking anchor are directly connected through the connecting rod mechanism, the locking anchor can be directly driven to lift by operating the handle, so that the position of the underframe can be quickly locked and unlocked, the operation is simple, and the operation efficiency is high.

The invention has the advantages of light structure, flexible use, adjustable height and the like, so that the invention can be applied to the maintenance and inspection work of airplanes of multiple types and different parts.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic cross-sectional view of the sleeve of the present invention;

fig. 3 is an assembly view of the linkage and locking anchor of the present invention.

The reference numerals in the drawings mean:

1-a chassis; 2-a workbench; 3-a scissor mechanical mechanism; 4-hand wheel; 5-a chain; 6-railing; 7-a protective chain; 8-a limit upright post; 9-climbing ladder; 10-inclined ladder; 11-a moving wheel; 12-a universal wheel; 14-a tow bar; 15-railing guide seat; 16-a sleeve; 17-a graphite copper sleeve; 18-sleeve cover; 19-a guardrail; 20-a handle; 21-a connecting shaft; 22-a bearing seat; 23-a swing rod; 24-a connecting rod; 25-a sliding sleeve; 26-locking ground feet; 27-a first sprocket; 28-a second sprocket; 29-operating shaft; 30-erecting a rod; 31-a conditioning aperture; 32-locking hole.

Detailed Description

The invention is further described below with reference to examples.

The lifting type airplane maintenance working ladder shown in figure 1 comprises an underframe 1, a working platform 2, a vertical ladder 9, a hand-operated lifting mechanism, a manual locking foot margin mechanism and a railing 6.

The bottom of the chassis 1 is provided with moving wheels 11, wherein the front end of the chassis is provided with universal wheels 12, the front of the chassis 1 is provided with an inclined ladder 10, two side edges of the inclined ladder 10 are respectively provided with a guardrail 19, and the guardrail 19 can also be used as a handrail.

The workbench 2 is arranged on the top of the underframe 1 through a hand-operated lifting mechanism. The hand-operated lifting mechanism of this embodiment includes scissors mechanical mechanism 3, chain 5, first sprocket 27, second sprocket 28 and hand wheel 4, workstation 2 is established on scissors mechanical mechanism 3, first sprocket 27 is established on scissors mechanical mechanism 3's operating axis 29, hand wheel 4 passes through the bearing rotatable side of establishing at chassis 1, hand wheel 4 and first sprocket 27 are located same side, hand wheel 4 is located the middle part of chassis 1, make things convenient for the workman to operate, second sprocket 28 and hand wheel 4 coaxial coupling, second sprocket 28 is driven by hand wheel 4 and rotates, first sprocket 27 and second sprocket 28 correspond from top to bottom, first sprocket 27 and second sprocket 28 pass through chain 5 and connect. The operating shaft 29 of the scissors fork mechanical mechanism 3 can be driven to rotate by rotating the hand wheel 4, so that the scissors fork mechanical mechanism 3 ascends and descends, and finally the workbench 2 is driven to ascend and descend.

The vertical ladder 9 is arranged in front of the workbench 2, the top of the vertical ladder 9 is fixedly connected with the workbench 2, and the lower part of the vertical ladder 9 extends to the top of the inclined ladder 10 and is close to the top of the inclined ladder 10. When in use, a worker climbs to the vertical ladder 9 from the inclined ladder 10 and then climbs to the workbench 2 along the vertical ladder 9.

Railing 6 can be up-down adjusted through railing guide holder 15 and install the both sides limit at workstation 2, and railing guide holder 15 is equipped with the graphite copper sheathing 17 of cover on the railing, and the upper and lower slide adjusting of railing 6 is for going on under the restriction of graphite copper sheathing 17. Specifically, the front and rear edges of the handrail 6 are respectively provided with vertical upright posts 30, the handrail guide seat 15 further comprises sleeves 16 vertically fixed on two side edges of the workbench, each sleeve 16 is arranged corresponding to each upright post, as shown in fig. 2, counter bores are respectively arranged at two end portions of a middle hole of each sleeve 16, graphite copper sleeves 17 are respectively embedded in the counter bores, sleeve covers 18 are respectively fixed at two ends of each sleeve 16 through screws, the sleeve covers 18 are annularly arranged, and the sleeve covers 18 compress the graphite copper sleeves 17 in the counter bores. The upright rod 30 correspondingly penetrates through the sleeve 16, the upright rod 30 is in contact with the graphite copper sleeve 17, a gap is formed between the upright rod 30 and the wall of the middle hole, and the graphite copper sleeve 17 reduces friction force when the upright rod 30 is adjusted in a vertical sliding mode. In order to lock the handrail 6, the aircraft maintenance ladder is further provided with locking pins corresponding to each sleeve respectively, the sleeves 16 are provided with locking holes 32, the upright rods 30 are provided with a plurality of adjusting holes 31, the adjusting holes 31 are vertically arranged, the locking pins penetrate through the locking holes 32 and one of the adjusting holes 31, so that the handrail 6 is locked, and the locking pins penetrate through the adjusting holes 31 with different heights, so that the handrail 6 can be locked at different heights. When in use, the hand-operated lifting mechanism drives the workbench to lift together with the vertical ladder and the railing.

Wherein, manual locking lower margin mechanism includes handle 20, link mechanism and locking lower margin 26, and the front portion of the both sides of chassis 1 of this embodiment is equipped with a locking lower margin 26 respectively, and the locking lower margin 26 symmetry of both sides sets up, and is concrete, is equipped with vertical sliding sleeve 25 respectively in the front portion of the both sides of chassis 1, and locking lower margin 26 is equipped with the stand, and but the stand wears in sliding sleeve 25, realizes locking lower margin 26's oscilaltion setting. The handle 20 is connected with the locking anchor 26 through a link mechanism, and the locking anchor 26 can be driven to lift by operating the handle 20.

The link mechanism comprises a connecting shaft 21 and two groups of link groups respectively arranged corresponding to the locking feet on the two sides, the connecting shaft 21 is transversely and rotatably arranged at the bottom of the underframe 1, and the two end parts of the connecting shaft 21 are respectively positioned above the locking feet 26 on the two sides. Specifically, bearing blocks 22 are fixed to the front portions of both sides of the base frame 1 by bolts, and both end portions of the connecting shaft 21 are rotatably supported by the bearing blocks 22. The handle 20 is connected with the right end of the connecting shaft 21, the handle 20 of the embodiment is an operating rod extending upwards, the lower end of the operating rod is connected with the right end of the connecting shaft 21, and the connecting shaft can be rotated through the operating rod.

The linkage connects the locking anchor 26 and the connecting shaft 21, and as shown in fig. 1 and fig. 3, the linkage of the present embodiment includes a swing rod 23 and a connecting rod 24, an upper end of the swing rod 23 is fixedly connected to an end of the connecting shaft 21 and swings with the rotation of the connecting shaft 21, an upper end of the connecting rod 24 is hinged to a lower end of the swing rod 24, and a lower end of the connecting rod 24 is hinged to an upper end of an upright post of the locking anchor 26. Thereby realize, rotating connecting axle 21 through handle 20, can drive locking lower margin 26 and go up and down, when locking lower margin 26 descends to the low point, the lower surface of locking lower margin 26 supports subaerial, and the front portion of chassis 1 is propped up, is located anterior two universal wheels 12 ground clearance to with the position locking of chassis 1, the linkage is in vertical state basically this moment, can not rotate under the pressure effect of locking lower margin 26.

In order to conveniently move the airplane maintenance ladder, a traction rod 14 is arranged on the side edge of the underframe 1, the traction rod 14 is used for being connected with an external trailer, the airplane maintenance ladder can be dragged by the external trailer during moving, and the traction rod 14 can be rotated to be flatly attached to the side surface of the underframe 1 so as to be accommodated in the traction rod 14.

In order to ensure the safety, the front side and the rear side of the workbench 2 are respectively provided with a protective chain 7, and the two ends of the protective chain 7 are respectively connected with the upper parts of the railings 6 at the two sides.

This embodiment is equipped with four vertical spacing stand 8 at the top of chassis 1, and four spacing stand 8 distribute at four angles, and workstation 2 will support when falling to the low point and lean on the upper end at spacing stand 8 to restriction workstation 2's home range.

When the staff need maintain the aircraft or detect, the accessible trailer removes this aircraft maintenance work ladder to the position of maintenance or detection, then rotate handle 20, make locking lower margin 26 support subaerial, the universal wheel 12 of front end is liftoff, accomplish the fixed back of aircraft maintenance work ladder's position, according to the height of maintenance or detection position, rotate hand wheel 4, adjust workstation 2 to suitable height, afterwards, the staff can climb up to vertical ladder 9 through inclined ladder 10, climb up to workstation 2 along vertical ladder 9 again, maintain or detect work at workstation 2. After the maintenance or detection work is finished, the handle 20 is rotated to lift the locking ground feet 26, so that the airplane maintenance ladder can be moved,

the above-described embodiments of the present invention are not intended to limit the scope of the present invention, and the embodiments of the present invention are not limited thereto, and various other modifications, substitutions and alterations can be made to the above-described structure of the present invention without departing from the basic technical concept of the present invention as described above, according to the common technical knowledge and conventional means in the field of the present invention.

Claims

1. The utility model provides a over-and-under type aircraft maintenance work ladder, its includes the chassis, the bottom of chassis is equipped with removes the wheel, the preceding inclined ladder that is equipped with of chassis, its characterized in that: the hand-operated lifting mechanism is used for driving the workbench to lift together with the vertical ladder and the railing to lift, the hand-operated locking mechanism comprises a handle, a connecting rod mechanism and a locking foot margin, the locking anchor feet are respectively arranged on two sides of the base frame, the locking anchor feet can ascend and descend vertically, the handle is connected with the locking anchor feet through the connecting rod mechanism, and the handle can be operated to drive the locking anchor feet to ascend and descend.

2. The elevating aircraft service ladder of claim 1, wherein: hand formula elevating system is including cutting fork mechanical mechanism, chain, first sprocket, second sprocket and hand wheel, the workstation is established cut fork mechanical mechanism's the higher authority, first sprocket is established cut fork mechanical mechanism's operating axis is last, the hand wheel is rotatable to be established the side of chassis, the second sprocket is coaxial to be established the tip of hand wheel, first sprocket and second sprocket pass through the chain and connect.

3. The elevating aircraft service ladder of claim 1, wherein: the railing is equipped with the pole setting of vertical direction, the railing guide holder still includes vertical the fixing the sleeve on workstation both sides limit the both ends of telescopic centre bore are equipped with respectively graphite copper sheathing, the pole setting correspond wear in the sleeve, the pole setting with graphite copper sheathing contact, nevertheless with be equipped with the clearance between the pore wall of centre bore.

4. The elevating aircraft service ladder of claim 3, wherein: the aircraft maintenance working ladder further comprises a locking pin, a locking hole is formed in the sleeve, a plurality of adjusting holes are formed in the vertical rod and are vertically arranged, and the locking pin penetrates through the locking hole and one of the adjusting holes.

5. The elevating aircraft service ladder of claim 1, wherein: the front parts of two sides of the underframe are respectively provided with one locking ground foot, the connecting rod mechanism comprises a connecting shaft and two groups of connecting rods which are respectively arranged corresponding to the locking ground feet on the two sides, the connecting shaft is transversely and rotatably arranged at the bottom of the underframe, two end parts of the connecting shaft are respectively positioned above the locking ground feet on the two sides, the handle is connected with one end of the connecting shaft, and the groups of connecting rods are connected with the locking ground feet and the connecting shaft; the connecting shaft is operated by the handle to rotate, and the rotation of the connecting shaft drives the locking ground feet to lift through the connecting shaft.

6. The elevating aircraft service ladder of claim 5, wherein: the connecting rod set comprises a swing rod and a connecting rod, the upper end of the swing rod is fixedly connected to the end portion of the connecting shaft and swings along with the rotation of the connecting shaft, the upper end of the connecting rod is hinged to the lower end of the swing rod, and the lower end of the connecting rod is hinged to the upper end of the locking anchor.

7. The elevating aircraft service ladder of claim 1, wherein: the aircraft maintenance working ladder further comprises a draw bar used for being connected with an external trailer, and the draw bar can be arranged on the side edge of the underframe in a containing mode.

8. The elevating aircraft service ladder of claim 1, wherein: and the front side and the rear side of the workbench are respectively provided with a protective chain, and the two ends of each protective chain are respectively connected with the upper parts of the handrails at the two sides.

9. The elevating aircraft service ladder of claim 1, wherein: and two side edges of the inclined ladder are respectively provided with a guardrail.

10. The elevating aircraft service ladder of claim 1, wherein: the top of chassis is equipped with vertical spacing stand, the workstation will support when dropping to the low point and lean on in the upper end of spacing stand.