Hydraulic lifting linkage aircraft maintenance platform

Abstract

The utility model provides a kind of hydraulic lifting linkage's aircraft maintenance platform, including the base structure for supporting entire platform, the top of base structure is equipped with multiple connecting rod lifting mechanism, locking mechanism for locking height is installed between multiple connecting rod lifting mechanism and base structure, the top support of multiple connecting rod lifting mechanism is equipped with fixed platform, one end of fixed platform is slidably installed with telescopic movable platform, manual hydraulic pump for providing lifting power is installed on fixed platform, and manual hydraulic pump is connected with multiple connecting rod lifting mechanism;Throttle valve block is installed on movable platform, throttle valve block is installed in hydraulic system, unloading switch is integrated on throttle valve block, and unloading switch only contacts compression after movable platform is retracted with fixed platform, and then throttle valve block is opened, to realize unloading.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of aircraft maintenance equipment, concretely relates to a hydraulic lifting linkage's aircraft maintenance platform. BACKGROUND

[0002] In the process of aircraft maintenance, the maintenance platform needs to be used, the workbench needs to be guaranteed to be lifted for the position of high height, and then the maintenance of high position is realized, in addition, for some unreachable work positions, the platform also needs to be guaranteed to be telescopic. The existing maintenance platform mainly adopts the fixed structure, cannot realize the adjustment of height, and the platform cannot be telescopic, thereby leading to the inconvenience of maintenance operation.

[0003] Based on this, the lifting operation platform for aircraft maintenance is disclosed in ZL202322287873.2, but the problem existing in the process of operation of this platform is that when the hydraulic working platform maintains the aircraft of high position, the movable platform needs to be usually extended to complete the maintenance of some unreachable work areas, after the maintenance work is completed, the operator may forget to retract the movable platform, and directly lower the working platform, leading to the accidental collision of the movable platform and the body, causing the damage of the body. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of hydraulic lifting linkage's aircraft maintenance platform, this platform is provided with unloading switch, unloading switch is integrated in throttle valve block, realizes the operation mode that movable platform is retracted first, then is lowered, avoids the safety accident of accidental collision aircraft due to movable un-retraction;In addition, this maintenance platform can be conveniently realized the movement adjustment of maintenance platform position according to the maintenance position, and the height of platform can be adjusted according to the maintenance height, to adapt to the maintenance of different height.

[0005] In order to realize the above technical features, the purpose of the utility model is realized as follows: a kind of hydraulic lifting linkage's aircraft maintenance platform, including the base structure for supporting the whole platform, the top of base structure is equipped with multi-connecting rod lifting mechanism, locking mechanism for locking height is installed between multi-connecting rod lifting mechanism and base structure, the top of multi-connecting rod lifting mechanism is supported and installed with fixed platform, one end of fixed platform is slidably installed with telescopic movable platform, manual hydraulic pump for providing lifting power is installed on fixed platform, and manual hydraulic pump is connected with multi-connecting rod lifting mechanism;Throttle valve block is installed on movable platform, throttle valve block is installed in hydraulic system, unloading switch is integrated on throttle valve block, unloading switch is only contacted and compressed with fixed platform after movable platform is retracted, and then throttle valve block is opened, to realize unloading.

[0006] The base structure comprises a base framework, a turnover pedal is hinged to the head end of the base framework, and a folding traction rod is hinged to the outer wall of the head end of the base framework.

[0007] The bottom of the base framework is fixedly provided with walking wheels for moving the whole platform.

[0008] The two side faces of the base framework are symmetrically hinged with folding supporting arms, and the distal ends of the folding supporting arms are provided with lifting supporting legs.

[0009] The folding traction rod comprises a main arm connected to the front end face of the base framework, and a traction ring rod is hinged to the other end of the main arm through a folding hinge.

[0010] The multi-link lifting mechanism comprises a bottom slide rail fixed to one end of the base framework, a first link is hinged to the bottom slide rail through a bottom slide sleeve, a bottom hinge seat is hinged to the other end of the base framework, a second link is hinged to the bottom hinge seat, the top of the first link and the second link is hinged with a multi-stage link, the top end of one of the links at the top is hinged to a top slide rail through a top slide sleeve, the top slide rail is fixed to the bottom end of the fixed platform, and the other link at the top is hinged to the bottom end of the fixed platform through a top hinge seat.

[0011] The second links are provided with lower oil cylinder connecting ears, a lifting oil cylinder is hinged to the lower oil cylinder connecting ears, the top end of the lifting oil cylinder is hinged to an upper oil cylinder connecting ear, and the upper oil cylinder connecting ear is arranged on the link where the top slide sleeve is located.

[0012] The locking mechanism comprises a rectangular slide rail fixed to the top of the base framework, a sliding block is slidingly fitted on the rectangular slide rail, the sliding block and the rectangular slide rail are relatively locked by a locking handle, the top of the sliding block is hinged with a bottom screw sleeve, the bottom screw sleeve and a top screw sleeve constitute a threaded transmission through a double-headed screw, and the top end of the top screw sleeve is hinged to the side wall of the link where the top hinge seat is located.

[0013] The fixed platform comprises a fixed platform framework, side guardrails are fixed to the top of the fixed platform framework, and a rear hanging guardrail is arranged between the tail portions of the side guardrails.

[0014] The movable platform comprises a movable platform slide rail arranged on the fixed platform framework, a telescopic platform framework is slidingly fitted in the movable platform slide rail, and folding guardrails are arranged at the top of the telescopic platform framework.

[0015] The hydraulic system comprises an oil tank, the oil tank is connected with a manual hydraulic pump through an oil filter, the manual hydraulic pump is connected with the lifting oil cylinder through a one-way valve, a throttle valve block and a foot-operated unloading valve are arranged on the oil return line of the lifting oil cylinder, the foot-operated unloading valve is arranged on the top of the movable platform, and a safety valve is further arranged on the hydraulic system.

[0016] The throttle block regulates the falling speed through two throttle valves with different diameters.

[0017] The utility model has the advantages of the following:

[0018] 1、The utility model discloses a platform is through setting with unloading switch, and unloading switch integration in throttle block realizes that the movable platform is withdrawn first, and then carries out the operation mode of falling, avoids the safety accident of unexpected collision airplane because of movable withdrawal.

[0019] 2、The utility model discloses a maintenance platform can according to the maintenance position, conveniently realize the movement adjustment of maintenance platform position, and can adjust the platform height according to the maintenance height, to adapt to the maintenance of different height, in addition, the top of platform can be telescopic adjustment, and then realize the maintenance of different positions.

[0020] 3、The walking wheel can conveniently realize the movement of whole base structure, and then adapt to the maintenance of different positions.

[0021] 4、The folding support arm can be unfolded in the operation process, and then guarantees the safety of operation and the stability of support.

[0022] 5、The folding traction rod is convenient and trailer is connected, and then realizes the movement of platform.

[0023] 6、The multi-connecting rod lifting mechanism can realize the lifting adjustment of platform.

[0024] 7、The locking mechanism can realize the height locking after the height adjustment is completed, and then guarantees the safety of subsequent operation. DRAWINGS

[0025] The utility model will be further described below in connection with the drawings and examples.

[0026] Figure 1 It is the front view of the utility model.

[0027] Figure 2 It is the first perspective three-dimensional drawing of the utility model.

[0028] Figure 3 It is the second perspective three-dimensional drawing of the utility model.

[0029] Figure 4 It is the third perspective three-dimensional drawing of the utility model.

[0030] Figure 5 It is the fourth perspective three-dimensional drawing of the utility model.

[0031] Figure 6 It is the plan view of the utility model.

[0032] Figure 7 The throttling valve block installation structure diagram of the utility model.

[0033] Figure 8 The hydraulic system diagram of the utility model.

[0034] In the figure: folding drawbar 1, base structure 2, locking mechanism 3, multi-link lifting mechanism 4, fixed platform 5, manual hydraulic pump 6, movable platform 7, throttling valve block 8, unloading switch 9, oil tank 10, oil filter 11, safety valve 12, check valve 13, foot-operated unloading valve 14;

[0035] Draw ring rod 101, folding hinge 102, main arm 103;

[0036] Traveling wheel 201, turnover pedal 202, base skeleton 203, folding support arm 204, lifting support leg 205;

[0037] Top screw sleeve 301, double-end screw 302, sliding block 303, locking handle 304, rectangular slide rail 305, bottom screw sleeve 306;

[0038] Bottom sliding sleeve 401, first connecting rod 402, oil cylinder lower connecting lug 403, bottom hinged seat 404, second connecting rod 405, lifting oil cylinder 406, oil cylinder upper connecting lug 407, top hinged seat 408, top sliding sleeve 409, bottom slide rail 410, top slide rail 411;

[0039] Fixed platform skeleton 501, rear hanging guardrail 502, side guardrail 503;

[0040] Folding guardrail 701, movable platform slide rail 702, telescopic platform skeleton 703. DETAILED DESCRIPTION

[0041] The embodiments of the utility model will be further described below in combination with the drawings.

[0042] Example 1:

[0043] Referring to Figures 1-8The utility model provides a hydraulic lifting linkage's aircraft maintenance platform, including the base structure 2 for supporting the whole platform, the top of base structure 2 is installed with multi-link lifting mechanism 4, and the locking mechanism 3 for locking height is installed between multi-link lifting mechanism 4 and base structure 2, and the top support of multi-link lifting mechanism 4 is installed with fixed platform 5, one end of fixed platform 5 is slidably installed with the telescopic movable platform 7, and the manual hydraulic pump 6 for providing lifting power is installed on fixed platform 5, and the manual hydraulic pump 6 is connected with multi-link lifting mechanism 4, throttle valve block 8 is installed on movable platform 7, throttle valve block 8 is installed in hydraulic system, unloading switch 9 is integrated on throttle valve block 8, and unloading switch 9 is only contacted and compressed with fixed platform 5 after movable platform 7 is retracted, and then throttle valve block 8 is opened to realize unloading.

[0044] Moreover, the maintenance platform can move and adjust the position of the maintenance platform according to the maintenance position, and can adjust the height of the platform according to the maintenance height to adapt to maintenance of different heights. In addition, the top of the platform can be telescopic adjusted to realize maintenance at different positions. The multi-link lifting mechanism 4 can lift the whole fixed platform 5, and the movable platform 7 can realize the telescopic adjustment of the platform.

[0045] Further, the base structure 2 includes a base frame 203, a flip pedal 202 is hinged to one end of the head of the base frame 203, and a folding traction rod 1 is hinged to the outer wall of the head of the base frame 203. The above-mentioned base frame 203 ensures the structural stability and reliability of the whole maintenance platform.

[0046] Further, walking wheels 201 for moving the whole platform are fixedly installed at the bottom corners of the base frame 203. The above-mentioned walking wheels 201 can conveniently move the whole base structure 2, thereby adapting to maintenance at different positions.

[0047] Further, folding support arms 204 are symmetrically hinged to the two side surfaces of the base frame 203, and lifting support legs 205 are installed at the ends of the folding support arms 204. The above-mentioned folding support arms 204 can be unfolded during operation, thereby ensuring the safety of operation and the stability of support.

[0048] Further, the folding traction rod 1 includes a main arm 103 connected to the front end surface of the base frame 203, and a traction ring rod 101 is hinged to the other end of the main arm 103 through a folding hinge 102. The above-mentioned folding traction rod 1 is convenient to connect with a trailer, thereby realizing the movement of the platform.

[0049] Further, the multi-link lifting mechanism 4 comprises a bottom slide rail 410 fixed at one end of the base frame 203, a first link 402 is hinged on the bottom slide rail 410 through a bottom slide sleeve 401, the other end of the base frame 203 is hingedly connected with a bottom hinge seat 404, the bottom hinge seat 404 is hingedly connected with a second link 405, the top of the first link 402 and the second link 405 is hingedly connected with a multi-stage link, one of the links at the top is hingedly connected to the top slide rail 411 through a top slide sleeve 409, the top slide rail 411 is fixed at the bottom end of the fixed platform 5, the other link at the top is hingedly connected to the bottom end of the fixed platform 5 through a top hinge seat 408. The oil cylinder lower connecting lug 403 is arranged between the second links 405, the lifting oil cylinder 406 is hingedly connected to the oil cylinder lower connecting lug 403, the top end of the lifting oil cylinder 406 is hingedly connected to the oil cylinder upper connecting lug 407, and the oil cylinder upper connecting lug 407 is arranged on the link where the top slide sleeve 409 is located. The above-mentioned multi-link lifting mechanism 4 can realize the lifting adjustment of the platform. During operation, the corresponding multi-link can be driven by the lifting oil cylinder 406 to realize the lifting action.

[0050] Further, the locking mechanism 3 comprises a rectangular slide rail 305 fixed at the top of the base frame 203, a sliding block 303 is slidingly fitted on the rectangular slide rail 305, the sliding block 303 and the rectangular slide rail 305 are relatively locked by the locking handle 304, the top of the sliding block 303 is hingedly connected with the bottom screw sleeve 306, the bottom screw sleeve 306 and the top screw sleeve 301 constitute a threaded transmission through the double-headed screw 302, and the top end of the top screw sleeve 301 is hingedly connected to the side wall of the link where the top hinge seat 408 is located. The above-mentioned locking mechanism 3 can realize the height locking after the height adjustment is completed, thereby ensuring the safety of subsequent operation.

[0051] Further, the fixed platform 5 comprises a fixed platform frame 501, side guardrails 503 are fixed at the top of both sides of the fixed platform frame 501, and rear hanging guardrails 502 are arranged between the tails of the side guardrails 503. The above-mentioned fixed platform 5 can be used for personnel standing during the maintenance operation.

[0052] Further, the movable platform 7 comprises a movable platform slide rail 702 arranged on the fixed platform frame 501, a telescopic platform frame 703 is slidingly fitted in the movable platform slide rail 702, and folding guardrails 701 are arranged at the top of both sides of the telescopic platform frame 703. The above-mentioned movable platform 7 facilitates the expansion of the platform during subsequent operation.

[0053] Further, the hydraulic system comprises an oil tank 10 connected with the manual hydraulic pump 6 through an oil filter 11, the manual hydraulic pump 6 is connected with the lifting oil cylinder 406 through a check valve 13, and the throttling valve block 8 and a foot-operated unloading valve 14 are arranged on the oil return line of the lifting oil cylinder 406, the foot-operated unloading valve 14 is arranged on the top of the movable platform 7, and a safety valve 12 is further arranged on the hydraulic system.

[0054] Further, the throttling valve block 8 is provided with two gears, i.e., a fast gear and a slow gear, for adjusting the descending speed through two throttling valves with different diameters, the throttling valves are arranged in the throttling valve block and control the oil return flow when the platform descends, the fast gear can realize rapid descending of the platform when the platform is in an empty state, the slow gear can realize comfortable and slow descending of the platform when personnel are located on the platform, and the unloading switch is released at an arbitrary height to guarantee the safety of the personnel.

[0055] The working process and principle of the utility model are as follows:

[0056] The hand pump, the oil tank and the unloading switch are arranged in the inner side of the workbench of the upper platform assembly, and the operation is convenient. Figure 8

[0057] The safety valve is arranged in the hydraulic system, when the system pressure exceeds the safety pressure, the safety valve is opened to unload, the system pressure does not rise any more, and the safety of the hydraulic system is protected.

[0058] Through the above-mentioned maintenance platform, first, according to the maintenance position, the whole platform is moved to the position to be maintained through the trailer, then the base structure 2 is stably supported, after the support is stable, the lifting oil cylinder 406 is started, the corresponding multi-link is driven to realize the lifting action, and then the fixed platform 5 on the top is lifted, when the special position needs to be maintained, the movable platform 7 can be pushed out, and then the expansion of the fixed platform 5 is realized.

[0059] After the maintenance work is completed, the operator only needs to recover the movable platform 7, the movable platform 7 drives the unloading switch 9 on the throttling valve block 8 to move, the unloading switch 9 is in contact with the fixed platform 5 and is compressed, and then the throttling valve block 8 is opened, at this moment, the foot-operated unloading valve 14 is stepped on, the oil return pipeline is conducted, unloading is realized, and the platform can descend. ​

[0060] If the movable platform 7 is not retracted, and only the foot-operated unloading valve 14 is operated, the oil return pipeline will not be connected, at this time the entire platform cannot be lowered, thereby achieving the control effect of the recovery and lowering linkage to ensure the safety of the platform.

[0061] The patent integrates a hydraulic linkage device in the hydraulic valve block system to realize the operation mode of retracting the movable platform first and then lowering it, thereby avoiding the safety accidents of accidental collision with the airplane caused by the failure of retracting the movable platform.

Claims

1. A hydraulic lifting linkage type aircraft maintenance platform, comprising a base structure (2) for supporting the whole platform, a multi-link lifting mechanism (4) mounted on the top of the base structure (2), a locking mechanism (3) for locking the height mounted between the multi-link lifting mechanism (4) and the base structure (2), a fixed platform (5) supported and mounted on the top of the multi-link lifting mechanism (4), a telescopic movable platform (7) slidingly mounted on one end of the fixed platform (5), a manual hydraulic pump (6) for providing lifting power mounted on the fixed platform (5), and the manual hydraulic pump (6) connected with the multi-link lifting mechanism (4); characterized in that, The movable platform (7) is provided with a throttle block (8) which is installed in a hydraulic system and is integrated with an unloading switch (9).

2. The hydraulic lift linked aircraft maintenance platform of claim 1, wherein: The base structure (2) comprises a base framework (203), the head of the base framework (203) is hingedly connected with a turnover pedal (202), and the head of the base framework (203) is hingedly connected with a folding traction rod (1) on the outer wall.

3. The hydraulic lift linked aircraft maintenance platform of claim 2, wherein: The bottom corners of the base framework (203) are fixedly provided with walking wheels (201) for moving the whole platform. The two side faces of the base framework (203) are symmetrically hingedly connected with folding support arms (204), and the tail ends of the folding support arms (204) are provided with lifting support legs (205).

4. The hydraulic lift linked aircraft maintenance platform of claim 2, wherein: The folding traction rod (1) comprises a main arm (103) connected to the front end face of the base framework (203), and the other end of the main arm (103) is hingedly connected with a traction ring rod (101) through a folding hinge (102).

5. The hydraulic lift linked aircraft maintenance platform of claim 2, wherein: The multi-link lifting mechanism (4) comprises a bottom slide rail (410) fixed to one end of the base framework (203), a first link (402) hingedly connected to the bottom slide rail (410) through a bottom slide sleeve (401), a bottom hinge seat (404) hingedly connected to the other end of the base framework (203), a second link (405) hingedly connected to the bottom hinge seat (404), and a plurality of links hingedly connected to the top of the first link (402) and the second link (405), one of the links at the top is hingedly connected to a top slide rail (411) through a top slide sleeve (409), the top slide rail (411) is fixed to the bottom end of the fixed platform (5), and the other link at the top is hingedly connected to the bottom end of the fixed platform (5) through a top hinge seat (408). Oil cylinder lower connecting ears (403) are arranged between the second links (405), the oil cylinder lower connecting ears (403) are hingedly connected with lifting oil cylinders (406), the top ends of the lifting oil cylinders (406) are hingedly connected with oil cylinder upper connecting ears (407), and the oil cylinder upper connecting ears (407) are arranged on the link where the top slide sleeve (409) is located.

6. The hydraulic lift linked aircraft maintenance platform of claim 5, wherein: The locking mechanism (3) comprises a rectangular slide rail (305) fixed to the top of the base framework (203), a sliding block (303) slidingly connected to the rectangular slide rail (305), and a locking handle (304) arranged between the sliding block (303) and the rectangular slide rail (305) for relative locking, the top of the sliding block (303) is hingedly connected with a bottom screw sleeve (306), the bottom screw sleeve (306) and a top screw sleeve (301) are in threaded transmission through a double-headed screw (302), and the top end of the top screw sleeve (301) is hingedly connected to the side wall of the link where the top hinge seat (408) is located.

7. The hydraulic lift linked aircraft maintenance platform of claim 1, wherein: The fixed platform (5) comprises a fixed platform framework (501), and the top of the fixed platform framework (501) is fixedly provided with side guardrails (503) on both sides, and rear hanging guardrails (502) are arranged between the tails of the side guardrails (503).

8. The hydraulic lift linked aircraft maintenance platform of claim 7, wherein: The movable platform (7) includes a movable platform slide rail (702) set on a fixed platform frame (501), and a telescopic platform frame (703) is slidably fitted inside the movable platform slide rail (702). Folding guardrails (701) are provided on both sides of the top of the telescopic platform frame (703).

9. The hydraulic lift linked aircraft maintenance platform of claim 5, wherein: The hydraulic system includes an oil tank (10), which is connected to a manual hydraulic pump (6) via an oil filter (11). The manual hydraulic pump (6) is connected to a lifting cylinder (406) via a check valve (13). A throttle valve block (8) and a foot-operated unloading valve (14) are installed on the return oil line of the lifting cylinder (406). The foot-operated unloading valve (14) is installed on the top of the movable platform (7). A safety valve (12) is also installed on the hydraulic system.

10. The hydraulic lift linked aircraft maintenance platform of claim 9, wherein: The throttle valve block (8) has two throttle valves of different diameters, one fast and one slow, to adjust the descent rate.

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