WO2022257336A1 - Escalier passagers télescopique à deux étages et camion-escalier pour passagers - Google Patents

Escalier passagers télescopique à deux étages et camion-escalier pour passagers Download PDF

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Publication number
WO2022257336A1
WO2022257336A1 PCT/CN2021/127222 CN2021127222W WO2022257336A1 WO 2022257336 A1 WO2022257336 A1 WO 2022257336A1 CN 2021127222 W CN2021127222 W CN 2021127222W WO 2022257336 A1 WO2022257336 A1 WO 2022257336A1
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WO
WIPO (PCT)
Prior art keywords
ladder
stairway
fixed
telescopic
guide rail
Prior art date
Application number
PCT/CN2021/127222
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English (en)
Chinese (zh)
Inventor
何彪
肖爽
李洁
Original Assignee
重庆达航工业有限公司
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Publication date
Application filed by 重庆达航工业有限公司 filed Critical 重庆达航工业有限公司
Publication of WO2022257336A1 publication Critical patent/WO2022257336A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
    • B64F1/00—Ground or aircraft-carrier-deck installations
    • B64F1/30—Ground or aircraft-carrier-deck installations for embarking or disembarking passengers
    • B64F1/315—Mobile stairs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
    • B60P3/00—Vehicles adapted to transport, to carry or to comprise special loads or objects

Definitions

  • the invention relates to a passenger plane boarding ladder, in particular to a two-stage telescopic boarding ladder and a boarding vehicle.
  • boarding elevators are mainly used in situations where there are no boarding bridges available, such as aircraft performing special missions, VIP planes, or when airport facilities are not perfect, boarding bridges have not been built, or the number of boarding seats on the bridges is small, etc. .
  • Existing passenger boarding ladders are only single-stage telescopic structures, including fixed ladders and telescopic ladders. Both fixed ladders and telescopic ladders are equipped with fixed steps. The far end of the telescopic ladder is equipped with a boarding platform. The minimum boarding height is formed, and the maximum boarding height is formed after the telescopic ladder is fully extended. The two boarding heights constitute the boarding height adjustment range of the boarding passenger ladder. Obviously, the length of the fixed ladder determines the minimum boarding height, and the length of the telescopic ladder determines the maximum boarding height.
  • the industry has clear regulations on the width of the boarding ladder, the height of the guardrail, the slope, the height of the steps, the depth of the steps, and the levelness of the steps.
  • the length of the telescopic ladder and the length of the fixed ladder can only be set according to a certain ratio range, and the length must be selected according to an integer number of steps.
  • the boarding passenger ladder is usually mounted on the vehicle chassis, and the whole is arranged according to the inclination of the front high and the rear low.
  • the fixed ladder stretches longitudinally.
  • the boarding vehicle When the boarding vehicle is driving in the airport, it is necessary to retract the telescopic ladder and lower the front end to meet the height limit requirements of the airport vehicle. Due to the retraction of the telescopic ladder in the height direction, the end of the telescopic ladder is located in the acute angle below the fixed ladder. Restricted by factors such as the space between the load-bearing platform and the acute-angled part below the fixed ladder, the fixed steps on the telescopic ladder, and the minimum boarding height, the number of steps on the telescopic ladder must be smaller than that of the fixed ladder. As a result, the boarding height adjustment range of the existing single-stage telescopic passenger ladder has relatively large limitations, and it is usually only suitable for some passenger aircraft with existing specifications.
  • the first purpose of the present invention is to provide a two-stage retractable boarding ladder for the existing boarding ladder to adapt to the limitation of passenger aircraft models. Increase the adjustment range of the extension height, expand the adaptation model, and form a telescopic connection structure with the fixed ladder through the two-stage telescopic ladder to ensure the stability of the extended state and the safety of use.
  • the second object of the present invention is to provide a boarding vehicle with the aforementioned two-stage retractable airstairs.
  • the present invention adopts the following technical solutions.
  • a two-stage telescopic boarding ladder including a fixed ladder and a main telescopic ladder, the front end of the fixed ladder is provided with a first hinged part, the first hinged part is hinged with a lift, and the rear end of the fixed ladder is provided with a second hinged part;
  • the main telescopic ladder is connected with a main ladder driving oil cylinder; it also includes an intermediate ladder between the fixed ladder and the main telescopic ladder.
  • With the main telescopic ladder it has a dragging structure that drags the middle ladder to extend out synchronously after the main telescopic ladder stretches out a set distance.
  • the middle ladder is located inside the ladder frame of the fixed ladder, and the middle ladder between the middle ladder and the fixed ladder
  • the pair of guide rails is located between the opposite side walls of the fixed ladder frame and the middle ladder frame.
  • a three-section telescopic structure boarding ladder with two poles is formed by the main telescopic ladder and the middle ladder, and the main telescopic ladder is driven to expand and contract by the main ladder driving oil cylinder.
  • the main telescopic ladder is driven to expand and contract by the main ladder driving oil cylinder.
  • it When it is used for boarding a locomotive, it is hinged to the rear end of the vehicle chassis through the second hinge at the rear end of the fixed ladder.
  • the lift is supported on the front end of the fixed ladder, and the pitch angle is adjusted by the lift. length. Under the premise of meeting the same retracted height, it can ensure that its passability in the airport will not be reduced, and can obtain a wider boarding height adjustment range to adapt to more types of passenger aircraft and reduce airport operating costs.
  • the two-stage telescopic ladder forms a telescopic connection structure with the fixed ladder to ensure the stability and safety of the extended state.
  • the middle ladder is dragged and protruded by the main telescopic ladder, and only the driving device for driving the main telescopic ladder to expand and contract can be installed to simplify the structure; the middle ladder is set in the ladder frame of the fixed ladder, which can effectively compact the structural layout, save space, reduce The small size of the whole machine provides guarantee for the passability in the airport.
  • the front end of the ladder frame of the fixed ladder is fixedly connected with a support frame
  • the support frame extends from the side of the fixed ladder frame to the back, and there is a gap between the support frame and the back of the fixed ladder for the telescopic movement of the main telescopic ladder.
  • Space; both the fixed ladder and the middle ladder are located on the front of the main telescopic ladder; and the upper and lower parts of the support frame are triangular, the first hinge part is set through the support frame, and is located in one of the triangles facing downward on one corner of the .
  • the support frame is used to form the connection relationship with the lift and the main telescopic ladder, and the structural size of the connection part is enlarged by the support frame to ensure the reliability of the connection; the middle ladder is set on the front of the main telescopic ladder to facilitate the drag structure to be arranged in a hidden way .
  • the guide rail pair between the fixed ladder and the main telescopic ladder is composed of two sub-rail pairs; the two sub-rail pairs are respectively composed of a load-bearing guide rail pair and a yaw control guide rail pair; and the load-bearing guide rail pair and the yaw
  • the control guide rail pair adopts the rolling guide rail structure.
  • both the load-carrying guide rail pair and the yaw control guide rail pair adopt a double-roller structure. To improve stability through double roller structure.
  • the two main load-bearing rollers in the load-bearing guide rail pair used to form the double-roller structure are fitted in the groove of the same load-bearing guide member, and the load-bearing guide member is located at the back of the main telescopic ladder, and the two main load-bearing rollers
  • the rollers are longitudinally distributed on the support frame according to the ladder body; the two yaw control rollers in the yaw control guide rail pair used to form the double roller structure are respectively fitted in the guide grooves of the two yaw control guide groove members, and Two yaw control guide rail pairs are formed, and the two yaw control guide groove members are respectively located on the back and side of the fixed ladder.
  • the two yaw control guide rail pairs are mainly used to control the pitch yaw, and the yaw control guide rail pairs on the side Also used to control left and right yaw.
  • the two yaw control guide rail pairs are mainly used to control the pitch yaw, and the yaw control guide rail pairs on the side Also used to control left and right yaw.
  • the yaw control rollers located on the side of the fixed ladder are set through the mounting plate, and shock absorbing pads are set on the side of the mounting plate opposite to the support frame.
  • the shock absorbing pad eliminates the gap between the mounting plate and the support frame, and absorbs the energy of left and right shaking to ensure the stability of the extended state.
  • the support frame is further provided with gap adjustment rollers, the gap adjustment rollers are located between the two main bearing rollers, and the gap adjustment rollers exert force on the main telescopic ladder in the direction of the main bearing rollers. Adjust the telescopic movement gap of the main telescopic ladder through the gap adjustment roller to ensure flexible operation and small pitch deflection, and eliminate or reduce the vibration under the dynamic load condition of passengers getting on and off the ladder.
  • the dragging structure is composed of a pulling member that can form an abutment and a dragging receiving member, the dragging receiving member is fixed on the middle ladder; the pulling member is fixed on the main telescopic ladder.
  • a retraction push connection structure can be set between the two to ensure the normal retraction of the middle ladder, thereby eliminating the hidden danger that the middle ladder cannot automatically retract under the action of gravity due to stuckness; obviously, the middle ladder A fall-back limit member should also be set between the fixed ladder to limit the retraction limit position.
  • the front end of the fixed ladder is provided with a locking mechanism to prevent the main telescopic ladder from sliding down
  • the locking mechanism has a first claw and a second claw driven by a locking cylinder, and the two claws correspond to
  • the two travel sections of the main telescopic ladder are used to form anti-slip locks for the main telescopic ladder respectively in the two travel sections.
  • the anti-backward locking of the main telescopic ladder and the intermediate ladder can be realized simultaneously.
  • two locking members for locking are arranged on the main telescopic ladder, and when one claw locks the corresponding locking member, the other claw has a space distance that does not interfere with the corresponding locking member.
  • the guide rail pair of the intermediate ladder is composed of a groove of customized channel steel and intermediate rollers located in the groove; the intermediate roller is arranged on the fixed ladder; the customized channel steel constitutes the middle ladder
  • the roller adopts a composite bearing structure; the groove profile of the custom-made channel steel is adapted to the generatrix of the two rolling elements on the composite bearing.
  • the rolling guide rail pair structure is used to ensure that the intermediate ladder is flexible in expansion and contraction, and can obtain good pitching and inclination limiting and left and right yaw limiting effects; and the composite bearing product and the supporting groove can be directly purchased Manufactured from steel profiles to reduce costs.
  • the present invention adopts the following technical solutions.
  • a boarding vehicle includes a self-propelled vehicle chassis and a boarding ladder mounted on the vehicle chassis; the boarding ladder is composed of a two-stage telescopic boarding ladder that realizes the purpose of the first invention.
  • the boarding ladder on the boarding vehicle is a three-section boarding ladder structure with two stages of telescopic ladders, which has the same structural features and excellent characteristics as the aforementioned boarding ladder.
  • the beneficial effect of the invention is that the boarding ladder has a larger height adjustment range, can adapt to more types of passenger aircraft, can reduce airport operating costs, and has stable structure, compact layout, reliable function and long service life.
  • the boarding car has the same structural features and excellent characteristics as the boarding ladder.
  • Fig. 1 is a schematic isometric view of the structure of the present invention.
  • Fig. 2 is a schematic front view of the structure of the present invention.
  • Fig. 3 is a schematic axonometric view of part of the structure of the boarding ladder in the present invention.
  • Fig. 4 is an enlarged view of part A in Fig. 3 of the present invention.
  • Fig. 5 is a partial structural front view of the front end of the fixed ladder in the present invention.
  • Fig. 6 is a partial structural axonometric view of the front end of the fixed ladder in the present invention.
  • Fig. 7 is an enlarged view of part B in Fig. 6 of the present invention.
  • Fig. 8 is a partial structural axonometric view of the rear end side of the main telescopic ladder in the present invention.
  • Fig. 9 is a partial structural axonometric view of the other side of the rear end of the main telescopic ladder in the present invention.
  • Fig. 10 is a schematic isometric view of the middle ladder in the present invention.
  • Fig. 11 is an enlarged view of part C in Fig. 10 of the present invention.
  • Fig. 12 is an enlarged view of part D in Fig. 3 of the present invention.
  • Fig. 13 is a schematic isometric view of the structure of the locking mechanism for preventing the main telescopic ladder from slipping in the present invention.
  • Fig. 14 is a schematic axonometric view of the structure of the concealed step protruding state in the present invention.
  • Fig. 15 is a schematic front view of the structure of the hidden step protruding state in the present invention.
  • Fig. 16 is a schematic axonometric view of the retracted state of the concealed step in the present invention.
  • Fig. 17 is a schematic front view of the structure of the retracted state of the hidden steps in the present invention.
  • Fig. 18 is a schematic diagram of a part of the present invention where the hidden steps are provided with a second limiting structure.
  • Fig. 19 is a schematic isometric view of the structure of the fixed ladder in the present invention, wherein the first step is in an extended state.
  • Fig. 20 is a schematic isometric view of the structure of the fixed ladder in the present invention, wherein the first step is in a retracted state.
  • Fig. 21 is a schematic isometric view of part of the structure of the boarding platform in the present invention.
  • a two-stage telescopic boarding ladder including a fixed ladder 100 and a main telescopic ladder 200
  • the front end of the fixed ladder 100 is provided with a first hinge, and the first hinge is hinged to a lift 600
  • the rear end of the fixed ladder 100 is provided with a second hinge
  • the front end of the main telescopic ladder 200 is provided with a boarding platform 500
  • the main telescopic ladder 200 is connected with a main ladder drive cylinder 220
  • the middle ladder 300 between the telescopic ladders 200, the middle ladder 300 and the main telescopic ladder 200 form a telescopic connection with the fixed ladder 100 through the corresponding guide rail sub-structure, and the middle ladder 300 and the main telescopic ladder 200 have an extension on the main telescopic ladder 200.
  • Fig. 4 Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, the back of the front end of the ladder frame of the fixed ladder 100 is fixedly connected with a support frame 400, and there is a gap between the support frame 400 and the fixed ladder 100 for the
  • the main telescopic ladder 200 expands and moves the space; the fixed ladder 100 and the intermediate ladder 300 are located in front of the main telescopic ladder 200 .
  • the guide rail pair between the fixed ladder 100 and the main telescopic ladder 200 is composed of two sub-rail pairs; the two sub-rail pairs are respectively composed of a load-bearing guide rail pair and a yaw control guide rail pair; and the load-bearing guide rail pair and the yaw control guide rail Both pairs adopt rolling guide rail structure.
  • the bearing guide rail pair and the yaw control guide rail pair both adopt a double-roller structure.
  • the two main load rollers 401 in the load guide rail pair for forming the double roller structure fit in the groove of the same load guide member 201, and the load guide member 201 is located at the back of the main telescopic ladder 200.
  • the main bearing rollers 401 are longitudinally distributed on the support frame 400 according to the ladder body; the two yaw control rollers 202 in the yaw control guide rail pair for forming a double roller structure are matched respectively in the two yaw control guide groove members.
  • two yaw control guide rail pairs are formed in the guide groove.
  • the two yaw control guide groove members are respectively located on the back and side of the fixed ladder 100.
  • the two yaw control guide rail pairs are mainly used to control pitch yaw and are located on the side
  • the yaw control guide rail pair is also used to control the left and right yaw.
  • the extension length limit block 102 is located at the front end of the guide groove of the side yaw control guide groove member 103 on the side, and the side yaw control guide groove member 103 is controlled by the fixed ladder.
  • 100 ladder frame side frame beam, the side frame beam is made of channel steel, and angle steel 104 is welded in the groove of the channel steel, so that the groove is narrowed and adapted to the diameter of the corresponding yaw control roller 202;
  • the back deflection control guide groove member 105 on the back of the ladder frame of the fixed ladder 100 is formed by bending a plate, and welded with the channel steel constituting the side frame beam of the ladder frame.
  • the yaw control rollers 202 located on the side of the fixed ladder 100 are set through the mounting plate 203 , and the side of the mounting plate 203 facing the supporting frame 400 is provided with a shock absorbing pad 204 .
  • the support frame 400 is also provided with a gap adjustment roller 402, the gap adjustment roller 402 is located between the two main bearing rollers 401, and the gap adjustment roller 402 exerts a force on the main telescopic ladder 200 to the direction of the main bearing roller 401;
  • the gap adjustment roller 402 is arranged on the adjustment bracket 403 , and the adjustment bracket 403 is arranged on the support frame 400 in a position-adjustable manner.
  • the dragging structure is composed of a pulling member 205 that can form abutment and a dragging receiving member 303, and the dragging receiving member 303 is fixed on the middle ladder frame 301 of the middle ladder 300; the pulling member 205 is fixed on the On the ladder frame longitudinal beam 207 of the main telescopic ladder 200; the yaw control roller 202 located on the yaw control guide rail pair at the back of the fixed ladder 100 is arranged at the end of the ladder frame longitudinal beam 207, and most of them are hidden in the grooves constituting the ladder frame longitudinal beam 207 In the steel groove, the top emerges from the hollow part on the side wall of the channel steel.
  • One end of the roller shaft of the yaw control roller 202 is connected to the groove bottom wall of the channel steel, and the other end is connected to the sealing plate 208.
  • the sealing plate 208 is blocked at the notch of this channel steel.
  • the middle ladder frame 301 forms a rectangular frame structure through the frame edges on both sides and the beams at both ends, and the middle ladder step 302 is fixedly connected to the middle ladder frame 301;
  • An intermediate ladder guide rail sub-structure is formed between the outer side and the inner side of the fixed ladder 100;
  • the intermediate ladder frame 301 is also provided with a fall-back limiting member 304, which is used to limit the ultimate fall-back position of falling back under the action of gravity.
  • the middle ladder frame 301 is provided with a crossbeam corresponding to each middle step 302, and the frontmost middle step 302 is supported on the front side beam.
  • the guide rail pair of the intermediate ladder is composed of a groove of custom-made channel steel and an intermediate roller 101 located in the groove; the intermediate roller 101 is fixedly connected to the intermediate roller seat 106 provided on the fixed ladder 100, and the intermediate roller
  • the seat 106 is in the shape of a strip plate; the custom-made channel steel constitutes the side frame of the middle ladder frame 301 .
  • the groove of the customized channel steel is adapted to the composite bearing constituting the intermediate roller 101, and the groove profile is adapted to the generatrices of the two rolling elements on the composite bearing.
  • the fall-back limiting member 304 is arranged in the groove of the channel steel, and the fall-back limiting member 304 abuts against the front end of the middle roller seat 106 to limit the fall-back limit position of the middle ladder 300 .
  • the groove front end of the channel steel is also provided with reinforcing ribs 305 and suspension rings 306 .
  • the frame edges on both sides of the middle ladder frame 301 are provided with drag receiving members 303, and the drag receiving members 303 are located on the lower end surface of the front end of the side frame edges.
  • the driving receiving block 307 is retracted.
  • the driving receiving block 307 is located in front of the drag receiving member 303 and extends outward to form a misalignment with the drag receiving member 303 in width and height directions.
  • the ladder frame of the main telescopic ladder 200 is provided with a retraction drive block 206, and the retraction drive block 206 is used to push the middle ladder frame 300 to forcibly retreat.
  • the step pedals of the middle steps 302 are detachably installed on the angle steel brackets, which are welded and fixed on the frame edges on both sides and supported on the corresponding beams or end beams, and one side of the angle steel brackets is attached to the side frame edges , and the other side fits with the step pedal.
  • the front end of the fixed ladder 100 is provided with a locking mechanism to prevent the main telescopic ladder 200 from slipping, and the locking mechanism has a first claw 702 and a second claw 703 driven by a locking cylinder 701,
  • the two claws correspond to the two travel sections of the main telescopic ladder 200 respectively, so as to respectively form anti-slip locks for the main telescopic ladder 200 in the two travel sections.
  • Fig. 13 it includes a locking claw driven by a locking cylinder 701;
  • the locking claw is composed of two distributed first claws 702 and second claws 703, and the two claws correspond to locked members respectively Two lifting stroke sections, to form anti-slip locking for the main telescopic ladder 200 in the two lifting stroke sections;
  • the locking cylinder 701 is composed of two cylinders of the first cylinder 701A and the second cylinder 701B, and the two The bottom ends of the cylinder bodies of the two oil cylinders are fixedly connected together.
  • first claw 702 is fixedly connected to the claw shaft 704, and the claw shaft 704 is rotatably arranged on the base component; the second claw 703 is hinged on the base component, and the second claw 703 It is connected with the claw shaft 704 through a crank linkage mechanism.
  • the specific crank-link mechanism includes a crank 706 and a connecting rod 407, the crank 706 is fixedly connected to the claw shaft 704; the connecting rod 407 is respectively hinged with the crank 706 and the second claw 703 through two ends .
  • the claw shaft 704 is rotatably connected to the mounting base 708, and the mounting base 708 is fixedly connected to the support frame 400; the claw shaft 704 is also fixedly connected to the active arm 709, and the free end of the active arm 709 is connected to the locking cylinder.
  • One end of the cylinder 701 is hinged, and the other end of the locking cylinder 701 is hinged on the cylinder base 705 , and the cylinder base 705 is fixedly connected to the support frame 400 .
  • a first claw 702 and a second claw 703 are respectively provided at both ends of the claw shaft 704, and the two first claws 702 at both ends and the two second claws 703 at both ends correspond to each other one by one.
  • the main telescopic ladder 200 includes two channel steels 230 with groove bottoms opposite to each other and arranged at a set interval.
  • the groove bottom backs of the channel steels 230 are fixedly connected with a first locking block 231, and the first locking block 231
  • a plurality of tooth-shaped locking structures 231a are arranged on the top, and the plurality of tooth-shaped locking structures 231a correspond to the first telescopic stroke of the main telescopic ladder 200, and the claw shaft 704 is driven by one of the first oil cylinder 701A or the second oil cylinder 701B Turning at a small angle, the first claw 702 forms an extension lock for the main telescopic ladder 200 by combining with the tooth-shaped locking structure 231a, preventing the main telescopic ladder 200 from sliding back in the first telescopic stroke section.
  • a horizontal bar-shaped locking structure 230a is provided on the side wall of the channel steel 230.
  • the horizontal bar-shaped locking structure 230a corresponds to the second telescopic stroke of the telescopic ladder.
  • the claw shaft 704 is jointly operated by the first oil cylinder 701A and the second oil cylinder 701B. Driven to rotate at a larger angle, the second claw 703 is combined with the horizontal bar-shaped locking structure 230a to form an extension lock for the main telescopic ladder 200, preventing the ladder frame from sliding back in the second telescopic stroke section.
  • the locking cylinder 701 can also be an ordinary single-piston-rod cylinder, or a double-piston-rod protruding from both ends simultaneously, or a two-stage cylinder to replace the combination of two single-piston-rod cylinders in which the aforementioned strokes are superimposed.
  • the stroke control of the oil cylinder is carried out in cooperation with the stroke switch, so as to control the stroke of the oil cylinder to correspond to the two strokes of the locked member.
  • the aforementioned first telescopic stroke mainly corresponds to the anti-slip locking when the main telescopic ladder 200 itself is telescopic and the intermediate ladder 300 is partially telescopic;
  • the cylinder body of the main ladder driving cylinder 220 is fixed on the back of the fixed ladder 100, and the front end of the piston rod is hinged on the back of the main telescopic ladder 200.
  • Two-stage oil cylinder structure, the total stroke formed by sequential expansion and contraction of two-stage piston rods achieves the structural requirement greater than the length of the cylinder body.
  • the hidden ladder step includes a rectangular step body 110, and also includes two curved arms 111 whose ends are hinged on the inside of the fixed ladder frame;
  • the step body 110 is L-shaped with a horizontal section greater than the vertical section, and the L-shaped vertical section upper ends on both sides of the step body 110 are hinged with the free ends of the two curved arms 111 respectively;
  • the L-shaped vertical section of the step body 110 The upper end of the rear side is hinged with a step driving cylinder 112 made of an electric cylinder, and the cylinder body of the step driving cylinder 112 is hinged on the ladder frame of the fixed ladder 100; Pull the ladder step body 110, and drive the free end of the curved arm 111 to swing upwards to the upper limit position, the L-shaped horizontal section of the ladder step body 110 is
  • the first limiting structure includes a frame limiting element 110a, the frame limiting element 110a is fixedly connected or integrally formed on the step body 110, and is located on the end face of the step body 110, and the frame limiting element 110a passes through
  • the L-shaped horizontal section of the step body 110 is limited to a lower limit position by abutting against the side of the free end extension section 111a of the curved arm 111 .
  • the frame limiting element 110a has a block structure, and the frame limiting element 110a and the free end extension section 111a of the curved arm 111 form a connection relationship in surface contact.
  • the free end extension section 111 a is extended outward from the hinged part of the curved arm 111 and the step body 110 by the curved arm 111 .
  • a tension spring 113 is also provided between the rear side of the L-shaped vertical section of the ladder body 110 and the ladder frame of the fixed ladder 100, and the connection of the tension spring 113 on the ladder body 110 The point is located at the lower end of the L-shaped vertical segment.
  • the step body 110 when the step body 110 is in the lower limit position, the step body 110 is in an extended state, and the position of the connection point between the extension spring 113 and the ladder frame is A, which is higher than the extension spring in height. 113 and the hinge point B of the step body 110; the tension spring 113 is inclined downward from point A.
  • the step body 110 when the step body 110 is at the upper limit position, the step body 110 is in a retracted state, and the position of the connection point between the tension spring 113 and the ladder frame is A, which is lower than the tension spring 113 in height.
  • the hinge point C between the spring 113 and the step body 110; the tension spring 113 is inclined upward from point A.
  • the hinge point D between the cylinder body of the step drive cylinder 112 and the ladder frame, the hinge point E between the curved arm 111 and the step body 110, the hinge point F between the curved arm 111 and the ladder frame , the three hinge points lie on the same straight line.
  • an unlocking elastic member can also be provided above the curved arm 111 at the upper limit position, and the unlocking elastic member elastically abuts against the curved arm 111 to release the dead point state when the step drive cylinder 112 is unloaded, so as to smoothly enter the ladder.
  • Stretch out process of step body 110 also can utilize the reasonable clearance that three this hinged joints are hingedly matched, under the unloading state of step drive cylinder 112, utilize gravity to remove dead point state, wherein, according to D as shown in Figure 4
  • the three points of , E, and F are set in a way of gradually rising, and the unlocking effect is better by relying on self-weight.
  • an upper limit position limiting member may also be provided on the ladder frame, so as to avoid the aforementioned three hinge points being in the same straight line, thereby avoiding the dead point problem.
  • the step driving cylinder 112 may also be constituted by a hydraulic cylinder or an air cylinder.
  • a sub-frame that moves synchronously with the beam is installed in the main frame, and the sub-frame is hinged to the beam.
  • the frame and the auxiliary loose-leaf increase the parts that carry the pedals, effectively reduce the size of the horizontal hollow, and eliminate or reduce the safety hazard of stepping on the air, the details are as follows.
  • the boarding platform 500 includes a main frame 501, a beam 502, a main hinge 503 and a sub-frame driving cylinder 504; the main frame 501 is provided with a sub-frame 505, and there is linear movement between the sub-frame 505 and the main frame 501 Guide rail pair; the middle part of the front end of the subframe 505 is hinged with the crossbeam 502, and an auxiliary hinge 506 is provided between the two sides of the front end of the subframe 505 and the crossbeam 502; between the main frames 501 mentioned above.
  • the linear moving guide rail pair adopts the rolling guide rail pair structure in which the roller 507 and the guide groove are matched; the roller 507 adopts a composite bearing structure; The generatrices of the two rolling bodies on the roller 507 are compatible; and the customized channel steel also constitutes the longitudinal reinforcement beam of the main frame 501;
  • a rubber hose 508 is provided on the front side of the beam 502, and a pressing block is arranged inside the rubber hose 508.
  • the rubber hose 508 is pressed and fixed on the beam 502 by the pressing block, and the front end of the pressing block is curved.
  • the beam 502 is further provided with two compression-type travel switches 509, and the contact rods of the compression-type travel switches 509 are arranged on the beam 502 elastically and flexibly.
  • two compression-type travel switches 509 are arranged side by side in the middle of the beam 502 at a certain distance, and the front end of the contact rod passes through the rubber tube 508 and is exposed outside.
  • a shock absorber 510 is also provided between the sub-frame driving cylinder 504 and the main frame 501, and the shock absorber 510 is connected in series at the tail end of the sub-frame driving cylinder 504, and the two are hinged.
  • the sub-frame driving cylinder 504 is composed of an electric cylinder.
  • the frame limiting element 110a in the concealed ladder step adopts a cylindrical structure, or the part in contact with the side of the free end extension section 111a of the curved arm 111 is an arbitrary columnar structure with an arc surface, so that the first A position limiting structure is defined by line contact; a second limiting structure is formed between the curved arm 111 and the ladder frame of the fixed ladder 100, and the second limiting structure is used to limit the curved arm 111 to the fixed position. Describe the limit position.
  • the second limiting structure includes a curved arm limiting element 114, which is a block structure or a rod structure, and the curved arm limiting element 114 is fixedly connected to the ladder frame of the fixed ladder 100.
  • the arm limiting element 114 limits the curved arm 111 to the lower limit position by abutting against the proximal side of the curved arm 111 .
  • the bending arm limiting element 114 when it adopts a limiting block, it is separately fixed on the inner side of the longitudinal beam; when a rod-shaped member is used, it is composed of reinforcing rods at the corresponding positions of the two longitudinal beams, and can also be specially arranged to reinforce the role of the reinforcing rods.
  • Embodiment 3 referring to Fig. 1, Fig. 2, a kind of boarding vehicle, comprises the vehicle chassis 800 that can walk by oneself and the boarding ladder that is carried on described vehicle chassis 800; Said boarding ladder is made of embodiment 1 or 2 The two-stage retractable boarding ladder constitutes.
  • the two-stage telescopic boarding ladder is hinged at the rear of the vehicle chassis 800 through the lower end of the fixed ladder 100, the lift 600 is located at the front and only depends on the driver's cab, the main telescopic ladder 200 is telescopic along the longitudinal direction of the vehicle, and the boarding platform 500 has the following functions:
  • the remote end of the telescopic ladder 200 is a comprehensive movement of lifting and moving back and forth, and the boarding ladder is retracted, and the boarding platform 500 is located above the top of the cab.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Transportation (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Ladders (AREA)

Abstract

La présente invention concerne un escalier passagers télescopique à deux étages et un camion-escalier pour passagers. L'escalier passagers comprend un escalier fixe, un escalier télescopique principal, et un escalier intermédiaire situé entre l'escalier fixe et l'escalier télescopique principal; chacun de l'escalier intermédiaire et de l'escalier télescopique principal forme une liaison télescopique avec l'escalier fixe au moyen d'une structure de paire de rails de guidage correspondante, et l'escalier intermédiaire et l'escalier télescopique principal ont une structure traînante pour faire glisser l'escalier intermédiaire afin qu'il s'étende de manière synchrone après que l'escalier télescopique principal s'est étendu sur une distance définie; l'escalier intermédiaire est situé à l'intérieur d'un cadre de l'escalier fixe; une paire de rails de guidage d'escalier intermédiaire entre l'escalier intermédiaire et l'escalier fixe est située entre des parois latérales opposées du cadre de l'escalier fixe et du cadre de l'escalier intermédiaire. Le camion-escalier pour passagers a ledit escalier passagers. Les effets bénéfiques de la présente invention sont les suivants : l'escalier passagers a une plus grande plage d'ajustement de la hauteur, peut s'adapter à davantage de modèles d'avions de passagers, peut réduire le coût d'exploitation de l'aéroport, et a une structure stable, une disposition compacte, une fonction fiable et une longue durée de vie. Le camion-escalier pour passagers a les mêmes caractéristiques structurales que l'escalier passagers et présente d'excellentes caractéristiques.
PCT/CN2021/127222 2021-06-08 2021-10-29 Escalier passagers télescopique à deux étages et camion-escalier pour passagers WO2022257336A1 (fr)

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CN202110634979.8A CN113511345A (zh) 2021-06-08 2021-06-08 一种两级伸缩登机梯及登机车
CN202110634979.8 2021-06-08

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Publication number Priority date Publication date Assignee Title
CN113511345A (zh) * 2021-06-08 2021-10-19 重庆达航工业有限公司 一种两级伸缩登机梯及登机车

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0429032A1 (fr) * 1989-11-18 1991-05-29 Lothar H. Dipl.-Ing. Wenzel Escalier pour passagers d'avions
CN201317465Y (zh) * 2008-12-24 2009-09-30 威海广泰空港设备股份有限公司 组装滑动梯式客梯车
CN208731244U (zh) * 2018-05-18 2019-04-12 无锡锡梅特种汽车有限公司 一种伸缩式旅客登机梯
CN113511345A (zh) * 2021-06-08 2021-10-19 重庆达航工业有限公司 一种两级伸缩登机梯及登机车

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0429032A1 (fr) * 1989-11-18 1991-05-29 Lothar H. Dipl.-Ing. Wenzel Escalier pour passagers d'avions
CN201317465Y (zh) * 2008-12-24 2009-09-30 威海广泰空港设备股份有限公司 组装滑动梯式客梯车
CN208731244U (zh) * 2018-05-18 2019-04-12 无锡锡梅特种汽车有限公司 一种伸缩式旅客登机梯
CN113511345A (zh) * 2021-06-08 2021-10-19 重庆达航工业有限公司 一种两级伸缩登机梯及登机车

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