Foldable composite material cabin working ladder

Abstract

The utility model provides a foldable composite material cabin working ladder which is characterized in that a suspension assembly is fixed at the top of a curved working ladder main body, and the bottom end of the curved working ladder main body is connected with a lower working ladder main body through a folding mechanism; telescopic supporting mechanisms are symmetrically fixed on the inner side of the curved working ladder main body; crawling ladder steps are fixedly mounted between the curved working ladder main body and the lower working ladder main body through bolts respectively; an upper folding guardrail is mounted on one side of the top end of the upper part of the curved working ladder main body through a handle folding mechanism; a middle folding guardrail is mounted at the top end of the lower part of the curved working ladder main body through a guardrail folding mechanism. The main body structure of the working ladder is made of the carbon fiber tube material instead of the traditional steel tube material, so that the weight of the whole working ladder is effectively reduced while the structural strength of the working ladder is ensured; and the working ladder adopts a foldable structural form, so that the working ladder can be conveniently folded and stored after being used.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of boarding ladders, and particularly relates to a foldable composite cabin working ladder. BACKGROUND

[0002] The aircraft cabin working ladder is mainly used for the entry and exit of air and ground service personnel into the aircraft cabin, and the existing working ladder is mainly integrally formed by assembling and welding steel pipe materials, and the boarding ladder has the following problems in the use process:

[0003] (1) The whole boarding ladder is heavy, and inconvenient to transfer and carry in the use process;

[0004] (2) The whole boarding ladder adopts an integrated structure, and is inconvenient to fold and store in the use process, and has a large space occupation. UTILITY MODEL CONTENTS

[0005] The utility model discloses a foldable composite cabin working ladder, the main body structure of the working ladder is made of carbon fiber pipe material, replaces traditional steel pipe material, effectively reduces the weight of the whole working ladder while guaranteeing the structural strength, and moreover, the working ladder adopts a foldable structure, and can be conveniently folded and stored after use.

[0006] In order to realize the above technical features, the utility model is realized in this way: a foldable composite cabin working ladder, comprising a curved working ladder main body, a suspension assembly is fixed at the top of the curved working ladder main body, and a lower working ladder main body is connected to the bottom end of the curved working ladder main body through a folding mechanism; a telescopic supporting mechanism is fixed symmetrically on the inner side of the curved working ladder main body; ladder rung steps are fixed and installed between the curved working ladder main body and the lower working ladder main body through bolts; an upper folding guardrail is installed on one side of the upper end of the curved working ladder main body through a handle folding mechanism; and a middle folding guardrail is installed on the lower end of the curved working ladder main body through a guardrail folding mechanism.

[0007] A roller assembly is installed at the bottom end of the lower working ladder main body.

[0008] The telescopic supporting mechanism comprises a tripod fixed on the curved working ladder main body, an adjusting screw rod is installed at the tail end of the tripod through thread cooperation, and a rubber supporting disc is fixed and installed at the tail end of the adjusting screw rod.

[0009] The curved working ladder main body, the lower working ladder main body and the ladder rung steps are all made of carbon fiber pipe materials.

[0010] The handle folding mechanism and the guardrail folding mechanism adopt the same structure, the handle folding mechanism comprises a bottom connecting column fixed on the curved working ladder body, a guardrail connecting column is hinged on the bottom connecting column through a first pin shaft, an outer sleeve of the bottom connecting column and the guardrail connecting column is sleeved with a rotating sleeve, an inner portion of the rotating sleeve is provided with a first spring, a bottom end of the first spring is blocked and limited by the rotating sleeve, and a top end of the first spring is blocked and limited by the guardrail connecting column.

[0011] The folding mechanism comprises a first ear plate arranged at an end of the curved working ladder body, the first ear plate is hingedly connected with a second ear plate through a hinge bolt, the second ear plate is arranged at a top end of the lower working ladder body, and the other ends of the first ear plate and the second ear plate are locked and connected through a bolt mechanism.

[0012] The bolt mechanism comprises a bolt seat fixed on an outer wall of the first ear plate, a bolt is installed through the inner portion of the bolt seat, a cross pin is installed at an outer end of the bolt, a pull ring is connected to the cross pin, the cross pin is matched with a cross groove arranged at a top end of the bolt seat, and a second spring is sleeved with the outer portion of the bolt and located in the inner portion of the bolt seat.

[0013] The roller assembly comprises a roller adapter sleeve sleeved at a bottom end of the lower working ladder body, and a roller is rotatably installed on the roller adapter sleeve through a wheel shaft.

[0014] The utility model has the advantages of the following beneficial effects:

[0015] 1. The main body structure of the working ladder is made of carbon fiber pipe material, which replaces the traditional steel pipe material, effectively reduces the weight of the whole working ladder while ensuring the structural strength, and the working ladder adopts a foldable structure, which can be easily folded and stored after use.

[0016] 2. The suspension assembly is made of aluminum alloy and has a rubber vulcanization process on the outer surface, which increases a layer of soft rubber to increase the friction force and safety of the corner.

[0017] 3. The roller assembly facilitates the movement of the whole working ladder during subsequent use, thereby saving labor.

[0018] 4. The telescopic supporting mechanism can be used to contact the outer wall of the airplane, thereby realizing stable support of the middle part of the working ladder during operation to enhance the structural strength and stability of the working ladder.

[0019] 5. The carbon fiber pipe material can effectively reduce the weight of the whole ladder and ensure the structural strength.

[0020] 6. The handle folding mechanism and the guardrail folding mechanism facilitate the folding and use of the corresponding folding guardrails, thereby facilitating the storage of the working ladder.

[0021] 7. The folding mechanism facilitates the folding of the curved working ladder body and the lower working ladder body, and further facilitates the storage of the working ladder. BRIEF DESCRIPTION OF DRAWINGS

[0022] The utility model will be further described in connection with the drawings and embodiments.

[0023] Figure 1 It is the first perspective three-dimensional drawing of the utility model.

[0024] Figure 2 It is the second perspective three-dimensional drawing of the utility model.

[0025] Figure 3 It is the third perspective three-dimensional drawing of the utility model.

[0026] Figure 4 It is the front view of the utility model.

[0027] Figure 5 It is the utility model Figure 4 A-A view.

[0028] Figure 6 It is the side view of the utility model.

[0029] Figure 7 It is the utility model Figure 6 B-B view.

[0030] In the drawing: hanging assembly 1, bolt 2, ladder step 3, curved working ladder body 4, upper folding guardrail 5, handle folding mechanism 6, telescopic support mechanism 7, middle folding guardrail 8, guardrail folding mechanism 9, folding mechanism 10, lower working ladder body 11, roller assembly 12;

[0031] Bottom connecting column 601, first pin shaft 602, rotating sleeve 603, first spring 604, guardrail connecting column 605;

[0032] Rubber support disc 701, adjusting screw rod 702, tripod 703;

[0033] First ear plate 1001, second ear plate 1002, hinged bolt 1003, bolt seat 1004, bolt 1005, cross slot 1006, horizontal pin 1007, pull ring 1008, second spring 1009;

[0034] Roller rotating seat 1201, wheel shaft 1202, roller 1203. DETAILED DESCRIPTION

[0035] The embodiments of the utility model will be further described in connection with the drawings.

[0036] Referring toFigures 1-7 The utility model provides a foldable composite cockpit working ladder, which comprises a curved working ladder body 4, a suspension assembly 1 fixed to the top of the curved working ladder body 4, a lower working ladder body 11 connected to the bottom end of the curved working ladder body 4 through a folding mechanism 10, a telescopic support mechanism 7 symmetrically fixed to the inner side of the curved working ladder body 4, a ladder rung 3 fixedly installed between the curved working ladder body 4 and the lower working ladder body 11 through a bolt 2, an upper folding guardrail 5 installed on one side of the upper top end of the curved working ladder body 4 through a handle folding mechanism 6, and a middle folding guardrail 8 installed on the lower top end of the curved working ladder body 4 through a guardrail folding mechanism 9. The curved working ladder body 4, the lower working ladder body 11 and the ladder rung 3 are all made of carbon fiber pipe material. The main body structure of the working ladder is made of carbon fiber pipe material, which replaces the traditional steel pipe material, effectively reduces the weight of the whole working ladder while ensuring the structural strength, and the working ladder adopts a foldable structure, which can be conveniently folded and stored after use. In the specific use process, the suspension assembly 1 is hooked at the entrance position of the aircraft cockpit, and the telescopic support mechanism 7 is supported on the outer wall of the aircraft, the working personnel go to the cockpit opening and enter the aircraft cockpit through the curved working ladder body 4 and the lower working ladder body 11, and the working ladder can be conveniently folded and stored after use.

[0037] Further, the suspension assembly 1 is the force support point of the whole working ladder, and the front corner of the suspension assembly 1 supports the whole working ladder and the load. The suspension assembly 1 is made of aluminum alloy, and the outer surface is treated by rubber vulcanization process, that is, a layer of soft rubber is added to increase the friction force and safety of the corner. The suspension assembly 1 is connected with the carbon fiber pipe through a bolt, has a detachable function, and can be disassembled and re-vulcanized if the vulcanization layer falls off during use, thereby improving the maintainability of the working ladder.

[0038] Further, the bottom end of the lower working ladder body 11 is provided with a roller assembly 12. The roller assembly 12 facilitates the movement of the whole working ladder during subsequent use, thereby saving labor. In the specific moving process, the roller assembly 12 is supported on the ground, and then the working ladder is manually pulled, so that the working ladder can be moved and carried.

[0039] Further, the telescopic support mechanism 7 comprises a tripod 703 fixed on the curved working ladder body 4, the end of the tripod 703 is installed by screwing the adjusting screw rod 702, the end of the adjusting screw rod 702 is fixedly installed with the rubber support disc 701. The telescopic support mechanism 7 can be used to contact with the outer wall of the aircraft, and then realize the stable support of the middle part of the working ladder during the working process, so as to enhance the structural strength and stability of the working ladder. At the same time, the rubber support disc 701 can play a good protection effect on the aircraft. The telescopic support mechanism 7 is the second force supporting point of the auxiliary suspension assembly 1 supporting the whole working ladder, and the working ladder is hung on the aircraft through the suspension assembly and the telescopic support assembly, so as to ensure that the ground clearance of the working ladder is within the range of 150mm to 300mm.

[0040] Further, the curved working ladder body 4, the lower working ladder body 11 and the ladder step 3 are all made of carbon fiber pipe material. The carbon fiber pipe material can effectively reduce the weight of the whole ladder and ensure the structural strength. The carbon fiber pipe is strictly processed according to HB / Z326-1998 "Composite Material Mold Pressing Process", and is made by a special mold through a mold pressing machine and a cutting bed, with a foam core and a composite material bushing embedded inside, so as to increase the structural strength of the carbon fiber pipe and the connecting point.

[0041] Further, the ladder step 3 is mainly made of carbon fiber material, which is mainly molded by carbon fiber pipe, embedded screw sleeve and foam core. The outer surface of the carbon fiber pipe is formed with three anti-skid lines through a mold, so as to improve the safety of personnel climbing up and down the working ladder.

[0042] Further, a widened step is arranged at the upper part of the working ladder, which can effectively increase the comfort of the pilot or the ground crew entering the cabin. The working plate structure and the step structure are consistent, except for the difference in width direction, and the width of the working plate is 150mm.

[0043] Further, the handle folding mechanism 6 and the guardrail folding mechanism 9 adopt the same structure, the handle folding mechanism 6 comprises a bottom connecting column 601 fixed on the curved working ladder body 4, a guardrail connecting column 605 is hinged on the bottom connecting column 601 through a first pin shaft 602, the outside of the bottom connecting column 601 and the guardrail connecting column 605 is sleeved with a rotating sleeve 603, the inside of the rotating sleeve 603 is provided with a first spring 604, the bottom end of the first spring 604 is blocked and limited by the rotating sleeve 603, and the top end of the first spring 604 is blocked and limited by the guardrail connecting column 605. Through the handle folding mechanism 6 and the guardrail folding mechanism 9, the folding and use of the corresponding folding guardrail are facilitated, and the storage of the working ladder is facilitated. During the working process, when storage is needed, the rotating sleeve 603 is manually slid, the first spring 604 is compressed through the rotating sleeve 603, the rotating sleeve 603 is disconnected between the bottom connecting column 601 and the guardrail connecting column 605, then the corresponding guardrail is manually rotated, the guardrail is rotated around the first pin shaft 602, and the folding and storage purpose is achieved.

[0044] Further, the folding mechanism 10 comprises a first ear plate 1001 arranged at the end of the curved working ladder body 4, the first ear plate 1001 is hingedly connected with a second ear plate 1002 through a hinge bolt 1003, the second ear plate 1002 is arranged at the top end of the lower working ladder body 11, and the other end of the first ear plate 1001 and the second ear plate 1002 is locked and connected through a bolt mechanism. Through the folding mechanism 10, the folding between the curved working ladder body 4 and the lower working ladder body 11 is facilitated, and the storage of the working ladder is facilitated. After use, the curved working ladder body 4 and the lower working ladder body 11 can be folded through the folding mechanism 10.

[0045] Further, the bolt mechanism comprises a bolt seat 1004 fixed on the outer wall of the first ear plate 1001, a bolt 1005 is installed in the bolt seat 1004, a cross pin 1007 is installed at one end of the outside of the bolt 1005, a pull ring 1008 is connected to the cross pin 1007, the cross pin 1007 is matched with a cross slot 1006 arranged at the top end of the bolt seat 1004, and the outside of the bolt 1005 is sleeved with a second spring 1009 in the inside of the bolt seat 1004. Through the bolt mechanism, the locking and unlocking of the entire folding mechanism 10 can be realized, and then the unfolding and working or storage of the working ladder can be realized. When locking is needed, the bolt 1005 is inserted between the first ear plate 1001 and the second ear plate 1002, and the locking of the two can be realized, when folding is needed, the cross pin 1007 is pulled, the cross pin 1007 is retracted, the bolt 1005 is separated from the locking between the first ear plate 1001 and the second ear plate 1002, then the lower working ladder body 11 is rotated, and the lower working ladder body 11 is rotated around the hinge bolt 1003, and the folding of the lower working ladder body 11 is realized.

[0046] Further, the roller assembly 12 comprises a roller adapter 1201 sleeved at the bottom end of the lower working ladder body 11, and a roller 1203 is rotatably installed on the roller adapter 1201 through an axle 1202. The above roller assembly 12 can realize auxiliary working ladder walking and facilitate personnel to push.

[0047] The working process and principle of the utility model are as follows:

[0048] When boarding is needed, firstly, the curved working ladder body 4 and the lower working ladder body 11 are unfolded, the unfolded state is locked through the folding mechanism 10, the telescopic supporting mechanism 7 and the suspension assembly 1 are supported at the corresponding parts of the airplane, the working ladder is hung on the airplane through the suspension assembly and the telescopic supporting assembly, then the boarding personnel go to the cabin of the airplane from the working ladder, and boarding is realized; after use, the working ladder is taken down and folded for storage.

Claims

1. A foldable composite material cockpit access ladder characterized by, The utility model provides a kind of curved working ladder, including curved working ladder body (4), the top of curved working ladder body (4) is fixed with suspension assembly (1), the bottom end of curved working ladder body (4) is connected with lower working ladder body (11) by folding mechanism (10);Curved working ladder body (4) is fixed with telescopic support mechanism (7) symmetrically in inside;Curved working ladder body (4) and lower working ladder body (11) are respectively fixed with ladder step (3) by bolt (2) installation;The upper end of curved working ladder body (4) is installed with upper folding guardrail (5) by handle folding mechanism (6) on one side;The lower end of curved working ladder body (4) is installed with middle folding guardrail (8) by guardrail folding mechanism (9).

2. The collapsible composite cabin ladder of claim 1, wherein: The bottom end of the lower working ladder body (11) is installed with a roller assembly (12).

3. The collapsible composite cabin ladder of claim 1, wherein: The telescopic support mechanism (7) includes a tripod (703) fixed to the curved working ladder body (4), a threaded adjustment screw (702) installed at the end of the tripod (703), and a rubber support disc (701) fixedly installed at the end of the adjustment screw (702).

4. The collapsible composite cabin ladder of claim 1 wherein: The curved working ladder body (4), the lower working ladder body (11), and the ladder step (3) are all made of carbon fiber pipe material.

5. The collapsible composite cabin ladder of claim 1 wherein: The handle folding mechanism (6) and the guardrail folding mechanism (9) have the same structure. The handle folding mechanism (6) includes a bottom connecting column (601) fixed to the curved working ladder body (4), a guardrail connecting column (605) hingedly connected to the bottom connecting column (601) by a first pin shaft (602), a rotating sleeve (603) sleeved outside the bottom connecting column (601) and the guardrail connecting column (605), a first spring (604) arranged inside the rotating sleeve (603), the bottom end of the first spring (604) blocked by the rotating sleeve (603), and the top end of the first spring (604) blocked by the guardrail connecting column (605).

6. The collapsible composite cabin ladder of claim 1 wherein: The folding mechanism (10) includes a first ear plate (1001) arranged at the end of the curved working ladder body (4), the first ear plate (1001) hingedly connected to a second ear plate (1002) by a hinge bolt (1003), the second ear plate (1002) arranged at the top end of the lower working ladder body (11), and the other end of the first ear plate (1001) and the second ear plate (1002) locked and connected by a latch mechanism.

7. The collapsible composite cabin ladder of claim 6, wherein: The latch mechanism includes a latch seat (1004) fixed to the outer wall of the first ear plate (1001), a latch (1005) installed inside the latch seat (1004), a cross pin (1007) installed at one end of the latch (1005), a pull ring (1008) connected to the cross pin (1007), the cross pin (1007) matched with a cross slot (1006) arranged at the top end of the latch seat (1004), and a second spring (1009) sleeved outside the latch (1005) and inside the latch seat (1004).

8. The collapsible composite cabin ladder of claim 2, wherein: The roller assembly (12) comprises a roller adapter (1201) sleeved on the bottom end of the lower working ladder body (11), and the roller (1203) is rotatably installed on the roller adapter (1201) through an axle (1202).

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