An aircraft wing and horizontal stabilizer maintenance workbench

Abstract

The present invention discloses an aircraft wing and horizontal stabilizer maintenance workbench, which includes a maintenance platform mechanism, a lifting drive mechanism, and a mobile support mechanism; the maintenance platform mechanism includes a maintenance operation platform, four side guardrails, and two release and positioning structures; the lifting drive mechanism is used to adjust the height of the maintenance operation platform; the mobile support mechanism is used to adjust the horizontal position of the lifting drive mechanism and the maintenance operation platform. The maintenance workbench can provide safety protection for maintenance personnel during use by means of the four side guardrails, and under the action of the release and positioning structures, the four side guardrails can be tilted and laid down outward, which can not only achieve extensible safety protection around the maintenance operation platform, but also pose no threat to the wing when the aircraft is in a low jacking state, avoiding the trouble of disassembling the guardrails.

Description

Technical Field

[0001] The present invention relates to a maintenance workbench, in particular to a maintenance workbench for aircraft wings and horizontal stabilizers. Background Art

[0002] At present, the existing guardrails of the wing maintenance platform are somewhat dangerous. When the aircraft is in different jacking states, the guardrails of the platform need to be removed. Moreover, the existing guardrails are horizontally protected by chain connections, and the center position of the chain connection is too low, making it easy for employees to stumble and fall. Therefore, it is necessary to design a maintenance workbench for aircraft wings and horizontal stabilizers that can be lifted and lowered to meet the usage requirements of the aircraft in different jacking states, and the guardrails can be set to be tilted, providing safety protection while also cooperating with the lifting height without the need for removal and disassembly. Summary of the Invention

[0003] The purpose of the invention is to provide a maintenance workbench for aircraft wings and horizontal stabilizers that can be lifted and lowered to meet the usage requirements of the aircraft in different jacking states, and the guardrails can be set to be tilted, providing safety protection while also cooperating with the lifting height without the need for removal and disassembly.

[0004] Technical Solution: The maintenance workbench for aircraft wings and horizontal stabilizers of the present invention includes a maintenance platform mechanism, a lifting drive mechanism, and a mobile support mechanism;

[0005] The maintenance platform mechanism includes a maintenance operation platform, four side guardrails arranged around the maintenance operation platform, and two release positioning structures for releasing the four side guardrails to tilt outward;

[0006] The maintenance operation platform is installed on the lifting drive mechanism, and the lifting drive mechanism adjusts the height of the maintenance operation platform. The lifting drive mechanism is installed on the mobile support mechanism, and the mobile support mechanism adjusts the horizontal position of the lifting drive mechanism and the maintenance operation platform.

[0007] Furthermore, the side guardrail is composed of two swinging square tubes, at least two horizontal rails, and at least two vertical rails; the horizontal rails are connected and arranged between the two swinging square tubes, and the horizontal rails are perpendicular to the swinging square tubes; the vertical rails are simultaneously installed on each horizontal rail, and the vertical rails are perpendicular to the horizontal rails; the lower ends of the swinging square tubes are swingably installed on the maintenance operation platform through swing rod hinge seats, and a blocking limit block for blocking the inward swing of the swinging square tubes is provided on the swing rod hinge seats; when the swinging square tubes are in contact with the blocking limit blocks, the swinging square tubes are perpendicular to the upper side of the maintenance operation platform.

[0008] Further, the two release positioning structures are respectively installed at two vertex angles of the maintenance operation platform that form vertical angles; the release positioning structure includes two steering pulleys, two release steel ropes, a rectangular frame, a rotating shaft, a driving worm, a driving worm gear, and a steel rope roller; the rectangular frame is fixedly installed on the lower side surface of the vertex angle of the maintenance operation platform, and the two steering pulleys are installed on the upper side surface of the vertex angle of the maintenance operation platform; the steel rope roller is rotatably installed in the rectangular frame, and the driving worm gear is coaxially and fixedly installed with the steel rope roller; the driving worm is rotatably installed on the inner top of the rectangular frame through a worm support, and the driving worm meshes with the driving worm gear; a driven bevel gear is fixedly installed at the end of the shaft head of the driving worm; the rotating shaft is vertically rotatably installed on the upper side frame of the rectangular frame, and the lower end of the rotating shaft extends into the rectangular frame, and a driving bevel gear meshing with the driven bevel gear is provided at the extending end; the upper end of the rotating shaft penetrates through the maintenance operation platform, and a release crank is installed at the upper end; one ends of the two release steel ropes are respectively fixedly installed on the upper ends of the two swinging square tubes near the vertex angle, and the other ends of the two release steel ropes respectively turn downward at the two steering pulleys, penetrate through the maintenance operation platform and the upper side frame of the rectangular frame, and are fixed on the steel rope roller.

[0009] Further, at least one protective chain is connected between the two swinging square tubes at the vertex angle of the maintenance operation platform; one end of the protective chain is fixed on one of the swinging square tubes, and the other end penetrates through the chain hole on the other swinging square tube and enters the swinging square tube; a counterweight ball for pulling the protective chain is provided at the end of the protective chain located inside the swinging square tube.

[0010] Further, a cantilever rod is provided on both side edges of the four vertex angles of the maintenance operation platform, and a support cushion block for supporting the toppled swinging square tube is provided on each cantilever rod.

[0011] Further, the mobile support mechanism includes a rectangular support plate, four universal wheels, and four support adjustment screw rods; the four universal wheels are installed on the lower side surface of the rectangular support plate; a support adjustment threaded hole is vertically provided at each of the four vertex angles of the rectangular support plate; the four support adjustment screw rods are respectively threadedly installed in the four support adjustment threaded holes; a support adjustment crank is fixedly provided at the upper end of each of the four support adjustment screw rods, and a support disc is rotatably installed at the lower end of each of the four support adjustment screw rods.

[0012] The two lower struts are connected to the upper and lower ends of the two lower struts by two support rods, and the upper ends of the two lower struts are rotatably mounted on the left ends of the two lower struts. A lower supporting roller is rotatably installed at the upper end of the rod; the two upper supporting rollers are respectively embedded in the front and rear upper T-shaped grooves, and the two lower supporting rollers are respectively embedded in the front and rear lower T-shaped grooves; a driving longitudinal beam is fixedly installed between the lower ends of the two upper support rods, and a lifting driving threaded hole is provided in the middle of the driving longitudinal beam; the lifting driving screw is rotatably installed horizontally in the middle of the upper side surface of the rectangular support plate through a screw support; the output shaft of the lifting driving motor is connected to one end of the lifting driving screw, and the other end of the lifting driving screw is threadedly screwed on the lifting driving threaded hole; the lower support rod on the front side is hinged and installed together with the upper support rod at the middle position through a pin shaft, and the lower support rod on the rear side is also hinged and installed together with the upper support rod at the middle position through a pin shaft.

[0013] Furthermore, a lifting safety mechanism is installed between the rectangular support plate and the front and rear sides of the maintenance operation platform to prevent the maintenance operation platform from falling suddenly.

[0014] Furthermore, the lifting safety mechanism includes a safety support rod, a T-shaped slider, a locking square rod, a locking compression spring, an L-shaped bracket and a safety unlocking component; a safety T-shaped slide groove is horizontally arranged on the front and rear sides of the rectangular support plate; the T-shaped sliders of the two lifting safety mechanisms are respectively slidably installed on the front and rear two safety T-shaped slide grooves; a safety rack is horizontally arranged at the bottom of the groove of the safety T-shaped slide groove; a strip-shaped through groove is horizontally arranged on the lower side of the T-shaped slider for facilitating the passage of the safety rack; a square lock hole is vertically arranged on the T-shaped slider and is vertically connected to the strip through groove; the locking square rod is vertically inserted in the square lock hole, and a buckle for snapping on the safety is provided at the lower end of the locking square rod. The buckle ratchet on the rack; the lower ends of the safety struts of the two lifting safety mechanisms are swing-mounted on the front and rear T-shaped sliders respectively through the strut hinge supports; the upper ends of the safety struts of the two lifting safety mechanisms are swing-hinged and mounted at the front and rear top corners on the right side of the maintenance operation platform; the L-shaped bracket is vertically fixed on the T-shaped slider; the upper end of the locking compression spring is fixed on the L-shaped bracket, and the lower end of the locking compression spring is fixed on the upper end of the locking square rod, which is used to elastically push the locking square rod to move downward, so that the buckle ratchet is timely buckled on the safety rack when the T-shaped slider moves to the left; the safety unlocking assembly is used to lift the locking square rod so that the buckle ratchet is separated from the safety rack.

[0015] Furthermore, the safety unlocking assembly includes an L-shaped plate, a strip foot pedal, two wire tubes and two pulling steel wires; the L-shaped plate is fixedly mounted on the upper side surface of the maintenance operation platform; one end of the two wire tubes are fixedly mounted on the upper horizontal plate of the L-shaped plate, and the other ends of the two wire tubes are respectively fixedly mounted on the upper horizontal rods of the two L-shaped brackets; the two pulling steel wires are respectively passed through the two wire tubes, and the pulling steel wires can be pulled in and out of the wire tubes; one end of the two pulling steel wires respectively passes through the upper horizontal rods of the two L-shaped brackets and is then installed on the upper end of the locking square rod; one end side of the strip foot pedal is hingedly mounted on the upper side surface of the maintenance operation platform; the other ends of the two pulling steel wires pass through the upper horizontal plate of the L-shaped plate and are then installed on the other end side of the strip foot pedal, and the strip foot pedal is tilted upward under the elastic pulling action of the two pulling steel wires; after the tilted end of the strip foot pedal is pressed down, the pulling steel wire pulls the locking square rod to lift upward.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: the four side guardrails can provide safety protection for maintenance personnel during use, and under the action of the release and positioning structure, the four side guardrails can be tilted outward and laid down, which can not only achieve extensible safety protection around the maintenance operation platform, but also pose no threat to the wing when the aircraft is in a relatively low jacking state, avoiding the trouble of disassembling the guardrails; the lifting drive mechanism can adjust the height of the maintenance operation platform, so as to further meet the adjustment needs of the jacking height of the aircraft within a large range; the mobile support mechanism can adjust the horizontal position of the maintenance operation platform to meet the on-site use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a front view structural schematic diagram of the present invention;

[0018] Figure 2 is a partial structural schematic diagram of the lifting safety mechanism of the present invention;

[0019] Figure 3 is a sectional structural schematic diagram of the release and positioning structure of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The technical solutions of the present invention will be described in detail below with reference to the drawings, but the protection scope of the present invention is not limited to the described embodiments.

[0021] Embodiment 1:

[0022] As Figures 1-3 shown, the maintenance workbench for the large wing and horizontal stabilizer of the aircraft disclosed by the present invention includes: a maintenance platform mechanism, a lifting drive mechanism, and a mobile support mechanism;

[0023] The maintenance platform mechanism includes a maintenance operation platform 1, four side guardrails arranged around the maintenance operation platform 1, and two release and positioning structures for releasing the four side guardrails to tilt outward;

[0024] The maintenance operation platform 1 is installed on the lifting drive mechanism, and the height of the maintenance operation platform 1 is adjusted by the lifting drive mechanism; the lifting drive mechanism is installed on the mobile support mechanism, and the horizontal positions of the lifting drive mechanism and the maintenance operation platform 1 are adjusted by the mobile support mechanism.

[0025] The four side guardrails can provide safety protection for maintenance personnel during use. Under the action of the release and positioning structure, the four side guardrails can be tilted and laid down outward. This can not only achieve extensible safety protection around the maintenance operation platform 1, but also pose no threat to the wings when the aircraft is in a low jacking state, avoiding the trouble of disassembling the guardrails. The lifting drive mechanism can adjust the height of the maintenance operation platform 1, further meeting the adjustment needs of the aircraft's jacking height within a large range. The mobile support mechanism can adjust the horizontal position of the maintenance operation platform 1 to meet the on-site use requirements.

[0026] Further, the side guardrail is composed of two swinging square tubes 11, three pairs of two horizontal rails 26 and seven vertical rails 27. The horizontal rails 26 are connected and arranged between the two swinging square tubes 11, and the horizontal rails 26 are perpendicular to the swinging square tubes 11. The vertical rails 27 are simultaneously installed on each horizontal rail 26, and the vertical rails 27 are perpendicular to the horizontal rails 26. The lower end of the swinging square tube 11 is swingably installed on the maintenance operation platform 1 through a swing rod hinge seat 49, and a blocking limit block for preventing the swinging square tube 11 from swinging inward is provided on the swing rod hinge seat 49. When the swinging square tube 11 is in contact with the blocking limit block, the swinging square tube 11 is perpendicular to the upper side surface of the maintenance operation platform 1. The blocking limit block can prevent the swinging square tube 11 from swinging inward, realizing the blocking and limiting of the swinging square tube 11.

[0027] Further, two release positioning structures are respectively installed at two vertex angles of the maintenance operation platform 1 that form vertical angles; the release positioning structure includes two steering pulleys 25, two release steel ropes 28, a rectangular frame 31, a rotating shaft 29, a driving worm 35, a driving worm gear 36, and a steel rope roller 39; the rectangular frame 31 is fixedly installed on the lower side surface of the vertex angle of the maintenance operation platform 1, and the two steering pulleys 25 are installed on the upper side surface of the vertex angle of the maintenance operation platform 1; the steel rope roller 39 is rotatably installed in the rectangular frame 31, and the driving worm gear 36 is coaxially and fixedly installed with the steel rope roller 39; the driving worm 35 is rotatably installed on the inner top of the rectangular frame 31 through a worm support 34, and the driving worm 35 meshes with the driving worm gear 36; a driven bevel gear 33 is fixedly installed at the end of the shaft head of the driving worm 35; the rotating shaft 29 is vertically rotatably installed on the upper side frame of the rectangular frame 31, and the lower end of the rotating shaft 29 extends into the rectangular frame 31, and a driving bevel gear 32 meshing with the driven bevel gear 33 is provided at the extending end; the upper end of the rotating shaft 29 penetrates through the maintenance operation platform 1, and a release crank 30 is installed on the upper end; one ends of the two release steel ropes 28 are respectively fixedly installed on the upper ends of two swing square tubes 11 near the vertex angle, and the other ends of the two release steel ropes 28 are respectively turned at the two steering pulleys 25 and then penetrate downward through the maintenance operation platform 1 and the upper side frame of the rectangular frame 31 and are fixed on the steel rope roller 39. The two release positioning structures are respectively installed at two vertical angles of the maintenance operation platform 1, so that the four release steel ropes 28 are used to pour and release the four side guardrails; the driving worm 35 and the driving worm gear 36 are used to form a rotating transmission structure, which can be positioned after adjustment to prevent the release steel ropes 28 from being pulled in the reverse direction; the two steering pulleys 25 can be used to realize the turning of the two release steel ropes 28 and reduce the friction force when penetrating through the maintenance operation platform 1 and the rectangular frame 31.

[0028] Further, two protective chains 22 are connected between the two swing square tubes 11 at the vertex angle of the maintenance operation platform 1; one end of the protective chain 22 is fixed on one of the swing square tubes 11, and the other end penetrates through the chain hole 20 on the other swing square tube 11 and enters the swing square tube 11; a counterweight ball 21 for pulling the protective chain 22 is provided at the end of the protective chain 22 located inside the swing square tube 11. The arrangement of the two protective chains 22 can protect the gap formed at the vertex angle after the side guardrail is poured, and can also form a pulling force between two adjacent side guardrails to enhance the stability after pouring.

[0029] Further, a cantilever rod 23 is provided on both sides of the edges of the four vertex angles of the maintenance operation platform 1, and a support cushion block 24 for supporting the poured swing square tube 11 is provided on each cantilever rod 23. The support cushion block 24 provided on the cantilever rod 23 can support the poured swing square tube 11 to ensure the stability of the side guardrail after pouring.

[0030] Furthermore, the mobile support mechanism includes a rectangular support plate 2, four universal wheels 8 and four support adjustment screws 9; the four universal wheels 8 are installed on the lower side of the rectangular support plate 2; a support adjustment threaded hole is vertically arranged at each of the four vertices of the rectangular support plate 2; the four support adjustment screws 9 are respectively threadedly screwed and installed on the four support adjustment threaded holes; a support adjustment crank 10 is fixedly arranged at the upper end of each of the four support adjustment screws 9, and a support disc 12 is rotatably installed at the lower end of each of the four support adjustment screws 9. The four universal wheels 8 can facilitate movement; the four support adjustment screws 9 can be used to adjust the support height at the four vertices to meet the horizontal adjustment requirements, and can play a stable supporting role during the lifting and disassembly process.

[0031] Further, the lifting drive mechanism includes two upper cross beams 18, two lower cross beams 19, two lower support rods 4, two upper support rods 50, a lifting drive motor 14 and a lifting drive screw 16; the two upper cross beams 18 are arranged horizontally and parallel on the lower side of the maintenance operation platform 1, and an upper T-shaped slide groove is arranged horizontally on the opposite inner side surfaces of the two upper cross beams 18; the two lower cross beams 19 are arranged horizontally and parallel on the upper side of the rectangular support plate 2, and a lower T-shaped slide groove is arranged horizontally on the opposite inner side surfaces of the two lower cross beams 19; the lower ends of the two lower support rods 4 are swing-mounted at the left ends of the two lower cross beams 19 through two support rod articulated seats 3, and the upper ends of the two lower support rods 4 are rotatably mounted with an upper supporting roller; the upper ends of the two upper support rods 50 are swing-mounted at the left ends of the two upper cross beams 18 through two support rod articulated seats 3. The upper ends of the two upper support rods 50 are both rotatably mounted with a lower support roller; the two upper support rollers are partially embedded in the front and rear upper T-shaped chutes, and the two lower support rollers are partially embedded in the front and rear lower T-shaped chutes; a driving longitudinal beam 5 is fixedly mounted between the lower ends of the two upper support rods 50, and a lifting drive threaded hole is provided in the middle of the driving longitudinal beam 5; the lifting drive screw 16 is rotatably mounted horizontally in the middle of the upper side of the rectangular support plate 2 through a screw support 15; the output shaft of the lifting drive motor 14 is connected to one end of the lifting drive screw 16, and the other end of the lifting drive screw 16 is threadedly screwed and mounted on the lifting drive threaded hole; the lower support rod 4 on the front side is hingedly mounted with the upper support rod 50 at the middle position through a pin shaft, and the lower support rod 4 on the rear side is also hingedly mounted with the upper support rod 50 at the middle position through a pin shaft. The lifting drive mechanism can realize the lifting drive of the maintenance operation platform 1.

[0032] Furthermore, a lifting safety mechanism for preventing the maintenance operation platform 1 from suddenly falling is installed between the front and rear sides of the rectangular support plate 2 and the maintenance operation platform 1. The two lifting safety mechanisms can prevent the maintenance operation platform 1 from suddenly falling due to the thread slipping of the lifting drive screw 16 or the fracture of the drive longitudinal beam 5 after the maintenance operation platform 1 is lifted, playing a role of backup safety protection.

[0033] Furthermore, the lifting safety mechanism includes a safety support rod 17, a T-shaped slider 13, a locking square rod 43, a locking compression spring 45, an L-shaped bracket 44, and a safety unlocking assembly; a safety T-shaped chute 6 is horizontally arranged on the front and rear sides of the rectangular support plate 2; the T-shaped sliders 13 of the two lifting safety mechanisms are respectively slidably installed on the front and rear safety T-shaped chutes 6; a safety rack 7 is horizontally arranged at the bottom of the safety T-shaped chute 6; a strip-shaped through groove 37 for the safety rack 7 to pass through is horizontally arranged on the lower side of the T-shaped slider 13; a square lock hole 38 perpendicular to and communicating with the strip-shaped through groove 37 is vertically arranged on the T-shaped slider 13; the locking square rod 43 is vertically inserted into the square lock hole 38, and a snap ratchet 47 for buckling on the safety rack 7 is arranged at the lower end of the locking square rod 43; the lower ends of the safety support rods 17 of the two lifting safety mechanisms are respectively swingably installed on the front and rear T-shaped sliders 13 through a support rod hinge support 48; the upper ends of the safety support rods 17 of the two lifting safety mechanisms are swingably hinged at the front and rear top corners on the right side of the maintenance operation platform 1; the L-shaped bracket 44 is vertically and fixedly installed on the T-shaped slider 13; the upper end of the locking compression spring 45 is fixedly installed on the L-shaped bracket 44, and the lower end of the locking compression spring 45 is fixedly installed on the upper end of the locking square rod 43, for elastically pushing the locking square rod 43 to move downward, so that the snap ratchet 47 can be buckled on the safety rack 7 in time when the T-shaped slider 13 moves leftward; the safety unlocking assembly is used to lift the locking square rod 43 so that the snap ratchet 47 disengages from the safety rack 7. By using the locking compression spring 45 to elastically push the locking square rod 43 to move downward, the snap ratchet 47 can be buckled on the safety rack 7 in time when the T-shaped slider 13 moves leftward, and is not affected when the T-shaped slider 13 moves rightward; by using the safety unlocking assembly, the locking square rod 43 can be lifted when the maintenance operation platform 1 is normally controlled to descend, so as not to affect the normal descending operation.

[0034] Furthermore, the safety unlocking assembly includes an L-shaped plate 46, a strip foot pedal 42, two wire tubes 40 and two pulling wires 41; the L-shaped plate 46 is fixedly mounted on the upper side of the maintenance operation platform 1; one end of the two wire tubes 40 is fixedly mounted on the upper side transverse plate of the L-shaped plate 46, and the other ends of the two wire tubes 40 are respectively fixedly mounted on the upper side transverse rods of the two L-shaped brackets 44; the two pulling wires 41 are respectively inserted into the two wire tubes 40, and the pulling wires 41 can be pulled in and out of the wire tubes 40; the two pulling wires 41 One end of the wire tube 40 and the pulling wire 41 respectively penetrate the upper side transverse rods of the two L-shaped brackets 44 and are then installed on the upper end of the locking square rod 43; one end of the strip foot pedal 42 is hingedly installed on the upper side of the maintenance operation platform 1; the other ends of the two pulling wires 41 penetrate the upper side transverse plate of the L-shaped plate 46 and are then installed on the other end side of the strip foot pedal 42, and the strip foot pedal 42 is tilted upward under the elastic pulling action of the two pulling wires 41; after the tilted end of the strip foot pedal 42 is pressed down, the pulling wire 41 pulls the locking square rod 43 upward. The combined structure of the wire tube 40 and the pulling wire 41 can realize the pulling of the locking square rod 43, so that after the maintenance personnel step on the strip foot pedal 42, the locking square rod 43 is lifted upward, so that the buckle ratchet 47 is separated from the safety rack 7 to achieve unlocking; the wire tube 40 and the pulling wire 41 adopt the existing brake wire tube and brake wire similar to those of bicycles.

[0035] As mentioned above, although the invention has been shown and described with reference to a specific preferred embodiment, it should not be interpreted as limiting the invention itself. Various changes may be made to it in form and detail without departing from the spirit and scope of the invention defined in the appended claims.

Claims

1. An aircraft wing and horizontal stabilizer maintenance workbench, characterized in that: it includes a maintenance platform mechanism, a lifting drive mechanism and a mobile support mechanism; The maintenance platform mechanism includes a maintenance operation platform (1), four side guardrails arranged around the maintenance operation platform (1), and two release positioning structures for releasing the four side guardrails to tilt outward; The maintenance operation platform (1) is installed on the lifting drive mechanism, and the height of the maintenance operation platform (1) is adjusted by the lifting drive mechanism; the lifting drive mechanism is installed on the mobile support mechanism, and the horizontal position of the lifting drive mechanism and the maintenance operation platform (1) is adjusted by the mobile support mechanism; The mobile support mechanism includes a rectangular support plate (2), four universal wheels (8) and four support adjustment screws (9); the four universal wheels (8) are installed on the lower side of the rectangular support plate (2); a support adjustment threaded hole is vertically provided at each of the four top corners of the rectangular support plate (2); the four support adjustment screws (9) are respectively threadedly installed in the four support adjustment threaded holes; a support adjustment crank (10) is fixedly provided at the upper end of each of the four support adjustment screws (9), and a support disc (12) is rotatably installed at the lower end of each of the four support adjustment screws (9); The lifting drive mechanism includes two upper cross beams (18), two lower cross beams (19), two lower struts (4), two upper struts (50), a lifting drive motor (14) and a lifting drive screw (16); the two upper cross beams (18) are horizontally arranged in parallel on the lower side of the maintenance operation platform (1), and an upper T-shaped chute is horizontally provided on the relative inner side surfaces of the two upper cross beams (18); the two lower cross beams (19) are horizontally arranged in parallel on the upper side of the rectangular support plate (2), and a lower T-shaped chute is horizontally provided on the relative inner side surfaces of the two lower cross beams (19); the lower ends of the two lower struts (4) are swingably installed at the left ends of the two lower cross beams (19) through two strut hinge seats (3), and an upper support roller is rotatably installed at the upper end of each of the two lower struts (4); the upper ends of the two upper struts (50) are swingably installed at the left ends of the two upper cross beams (18) through two strut hinge seats (3), and a lower support roller is rotatably installed at the upper end of each of the two upper struts (50); the two upper support rollers are respectively inserted into the front and rear upper T-shaped chutes, and the two lower support rollers are respectively Embedded in the two lower T-shaped slide grooves at the front and rear sides; a driving longitudinal beam (5) is fixedly installed between the lower ends of the two upper support rods (50), and a lifting driving threaded hole is provided in the middle of the driving longitudinal beam (5); the lifting driving screw rod (16) is rotatably installed horizontally in the middle of the upper side surface of the rectangular support plate (2) through a screw rod support (15); the output shaft of the lifting driving motor (14) is connected to one end of the lifting driving screw rod (16), and the other end of the lifting driving screw rod (16) is threadedly screwed and installed on the lifting driving threaded hole; the front lower support rod (4) and the upper support rod (50) are hingedly installed together at the middle position through a pin shaft, and the rear lower support rod (4) and the upper support rod (50) are also hingedly installed together at the middle position through a pin shaft; A lifting safety mechanism is installed between the rectangular support plate (2) and the front and rear sides of the maintenance operation platform (1) to prevent the maintenance operation platform (1) from falling suddenly; The lifting safety mechanism comprises a safety support rod (17), a T-shaped slider (13), a locking square rod (43), a locking compression spring (45), an L-shaped bracket (44) and a safety unlocking assembly; a safety T-shaped slide groove (6) is transversely arranged on the front and rear sides of the rectangular support plate (2); the T-shaped sliders (13) of the two lifting safety mechanisms are respectively slidably mounted on the front and rear two safety T-shaped slide grooves (6); a safety rack (7) is transversely arranged at the bottom of the groove of the safety T-shaped slide groove (6); a strip-shaped through groove (37) is transversely arranged on the lower side of the T-shaped slider (13) for facilitating the passage of the safety rack (7); a square lock hole (38) is vertically arranged on the T-shaped slider (13) and is vertically connected to the strip-shaped through groove (37); the locking square rod (43) is vertically inserted in the square lock hole (38), and a locking member for snapping on the safety rack (7) is provided at the lower end of the locking square rod (43). ); the lower ends of the safety struts (17) of the two lifting safety mechanisms are swingably mounted on the front and rear T-shaped sliders (13) through the strut hinged supports (48); the upper ends of the safety struts (17) of the two lifting safety mechanisms are swingably hingedly mounted at the front and rear corners of the right side of the maintenance operation platform (1); the L-shaped bracket (44) is vertically fixedly mounted on the T-shaped slider (13); the upper end of the locking compression spring (45) is fixedly mounted on the L-shaped bracket (44), and the lower end of the locking compression spring (45) is fixedly mounted on the upper end of the locking square rod (43), and is used to elastically push the locking square rod (43) to move downward, so that the buckle ratchet (47) is timely buckled on the safety rack (7) when the T-shaped slider (13) moves to the left; the safety unlocking component is used to lift the locking square rod (43) so that the buckle ratchet (47) is separated from the safety rack (7).

2. The aircraft wing and horizontal stabilizer maintenance workbench according to claim 1, Features: The side guardrail is composed of two swing square tubes (11), at least two transverse rails (26) and at least two vertical rails (27); the transverse rails (26) are connected and arranged between the two swing square tubes (11), and the transverse rails (26) are perpendicular to the swing square tubes (11); the vertical rails (27) are simultaneously installed on each transverse rail (26), and the vertical rails (27) are perpendicular to the transverse rails (26); the lower ends of the swing square tubes (11) are swingably installed on the maintenance operation platform (1) through swing rod hinge seats (49), and blocking limit blocks for blocking the inward swing of the swing square tubes (11) are provided on the swing rod hinge seats (49); when the swing square tubes (11) are in close contact with the blocking limit blocks, the swing square tubes (11) are perpendicular to the upper side surface of the maintenance operation platform (1).

3. The aircraft wing and horizontal stabilizer maintenance workbench according to claim 1, characterized in that: Two release and positioning structures are respectively installed at two vertex angles of the maintenance operation platform (1) that form vertical angles; the release and positioning structure includes two steering pulleys (25), two release steel ropes (28), a rectangular frame (31), a rotating shaft (29), a driving worm (35), a driving worm gear (36) and a steel rope roller (39); the rectangular frame (31) is fixedly installed on the lower side surface of the vertex angle of the maintenance operation platform (1), and the two steering pulleys (25) are installed on the upper side surface of the vertex angle of the maintenance operation platform (1); the steel rope roller (39) is rotatably installed in the rectangular frame (31), and the driving worm gear (36) is coaxially and fixedly installed with the steel rope roller (39); the driving worm (35) is rotatably installed on the inner top of the rectangular frame (31) through a worm support (34), and the driving worm (35) meshes with the driving worm gear (36); a driven bevel gear (33) is fixedly installed at the end of the shaft head of the driving worm (35); the rotating shaft (29) is vertically rotatably installed on the upper side frame of the rectangular frame (31), and the lower end of the rotating shaft (29) extends into the rectangular frame (31), and a driving bevel gear (32) meshing with the driven bevel gear (33) is provided at the extending end; the upper end of the rotating shaft (29) penetrates through the maintenance operation platform (1), and a release crank (30) is installed at the upper end; one ends of the two release steel ropes (28) are respectively fixedly installed on the upper ends of the two swing square tubes (11) near the vertex angle, and the other ends of the two release steel ropes (28) respectively turn downward at the two steering pulleys (25), penetrate through the maintenance operation platform (1) and the upper side frame of the rectangular frame (31) and are fixed on the steel rope roller (39).

4. The aircraft wing and horizontal stabilizer maintenance workbench according to claim 3, characterized in that: At least one protective chain (22) is connected between two swinging square tubes (11) at the top corners of the maintenance operation platform (1); one end of the protective chain (22) is fixed to one of the swinging square tubes (11), and the other end passes through a chain hole (20) on the other swinging square tube (11) and enters the swinging square tube (11); a counterweight ball (21) for pulling the protective chain (22) is provided at the end of the protective chain (22) located in the swinging square tube (11).

5. The aircraft wing and horizontal stabilizer maintenance workbench according to claim 3, Features: A cantilever rod (23) is provided on both side edges of the four top corners of the maintenance operation platform (1), and a supporting pad (24) for supporting the tilted swinging square tube (11) is provided on each cantilever rod (23).

6. The aircraft wing and horizontal stabilizer maintenance workbench according to claim 1, Features: The safety unlocking assembly comprises an L-shaped plate (46), a strip foot pedal (42), two wire tubes (40) and two pulling steel wires (41); the L-shaped plate (46) is fixedly mounted on the upper side of the maintenance operation platform (1); one end of the two wire tubes (40) is fixedly mounted on the upper transverse plate of the L-shaped plate (46), and the other ends of the two wire tubes (40) are respectively fixedly mounted on the upper transverse rods of two L-shaped brackets (44); the two pulling steel wires (41) are respectively inserted into the two wire tubes (40), and the pulling steel wires (41) can be pulled in and out of the wire tubes (40); the two pulling steel wires (41) One end of each of the strip foot pedals (42) passes through the upper transverse bars of the two L-shaped brackets (44) and is then mounted on the upper end of the locking square rod (43); one end of the strip foot pedal (42) is hingedly mounted on the upper side of the maintenance operation platform (1); the other ends of the two pulling wires (41) pass through the upper transverse plate of the L-shaped plate (46) and are then mounted on the other end of the strip foot pedal (42), and the strip foot pedal (42) is tilted upward under the elastic pulling action of the two pulling wires (41); after the tilted end of the strip foot pedal (42) is pressed down, the pulling wires (41) pull the locking square rod (43) to lift upward.

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