CN110104594B - Aviation hydraulic elevator - Google Patents
Aviation hydraulic elevator Download PDFInfo
- Publication number
- CN110104594B CN110104594B CN201910376109.8A CN201910376109A CN110104594B CN 110104594 B CN110104594 B CN 110104594B CN 201910376109 A CN201910376109 A CN 201910376109A CN 110104594 B CN110104594 B CN 110104594B
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- China
- Prior art keywords
- hydraulic cylinder
- oil
- cylinder assembly
- locking
- platform
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000010008 shearing Methods 0.000 claims description 22
- 238000007789 sealing Methods 0.000 claims description 10
- 210000004907 gland Anatomy 0.000 claims description 7
- 230000003028 elevating effect Effects 0.000 claims description 5
- 239000003921 oil Substances 0.000 description 42
- 238000000034 method Methods 0.000 description 9
- 238000012423 maintenance Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000010720 hydraulic oil Substances 0.000 description 3
- 241000282326 Felis catus Species 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
Classifications
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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
- B64F5/00—Designing, manufacturing, assembling, cleaning, maintaining or repairing aircraft, not otherwise provided for; Handling, transporting, testing or inspecting aircraft components, not otherwise provided for
- B64F5/40—Maintaining or repairing aircraft
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
- B66F11/04—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
- B66F11/042—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations actuated by lazy-tongs mechanisms or articulated levers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F17/00—Safety devices, e.g. for limiting or indicating lifting force
- B66F17/006—Safety devices, e.g. for limiting or indicating lifting force for working platforms
Abstract
The invention provides an aviation hydraulic elevator which comprises a bottom frame, wherein the top of the bottom frame is supported and provided with a top operation platform through a scissor lifting mechanism, the scissor lifting mechanism is provided with a hydraulic cylinder assembly for lifting the top operation platform, the hydraulic cylinder assembly is provided with an oil cylinder mechanical lock mechanism for self-locking the hydraulic cylinder assembly, and the hydraulic cylinder assembly is connected with a hand pump structure and provides hydraulic power to drive the lifting action of the hydraulic cylinder assembly. The lifting oil cylinder structure of the elevator adopts a purely mechanical locking device, and when an oil pipe suddenly bursts or the bottom of the oil cylinder suddenly falls off, the piston rod can be mechanically locked, so that the safety accident caused by the sudden falling of a platform is avoided.
Description
Technical Field
The invention relates to the field of aircraft overhaul equipment, in particular to an aviation hydraulic elevator.
Background
The aviation hydraulic elevator mainly provides a near platform for ground staff to finish maintenance of high-level equipment of an airplane or is used as a supporting platform for disassembling and assembling airborne equipment. Most of the existing hydraulic elevators of the army are of steel structures, and lifting power of the hydraulic elevators is mainly realized by means of hydraulic cylinders, and the hydraulic cylinders are mainly used as lifting power devices of lifting platforms.
At present, the traditional anti-falling mode of the lifting platform mainly comprises the steps of installing an anti-explosion valve at the oil port of the hydraulic oil cylinder, cutting off and closing an oil return path when an oil pipe bursts suddenly, so that the oil is sealed in a cylinder barrel of the hydraulic oil cylinder or the oil path is throttled to reduce the oil return flow to prevent the platform from falling suddenly, but if the hydraulic oil cylinder has faults such as sudden falling of a cylinder bottom, the anti-falling function cannot be achieved. And further brings potential safety hazard to operators of platform operation.
Disclosure of Invention
In order to solve the technical problems, the invention provides an aviation hydraulic elevator, wherein a lifting oil cylinder structure of the elevator adopts a purely mechanical locking device, and a piston rod can be mechanically locked when an oil pipe suddenly bursts or an oil cylinder bottom suddenly falls off, so that a safety accident caused by sudden falling of a platform is avoided.
In order to achieve the technical characteristics, the aim of the invention is realized in the following way: the utility model provides an aviation hydraulic elevator, it includes the bottom frame, the top of bottom frame is supported through cutting fork elevating system and is installed top operation platform, cut and install the pneumatic cylinder subassembly that is used for jacking top operation platform on the fork elevating system, install the hydro-cylinder mechanical lock mechanism that is used for carrying out the auto-lock to it on the pneumatic cylinder subassembly, the pneumatic cylinder subassembly links to each other with hand pump structure and provides hydraulic power and drives the jacking action of pneumatic cylinder subassembly.
The bottom frame includes the bottom frame, the lower margin gyro wheel is installed in the bottom four corners of bottom frame, has the screw rod to support through the leg mounting on the both sides wall of bottom frame, have the cat ladder through link fixed mounting on the head lateral wall of bottom frame, the side-mounting of cat ladder has the handrail, articulates there is the traction lever on the afterbody lateral wall of bottom frame.
The shearing fork lifting mechanism comprises a first shearing fork rod hinged to the top of the bottom frame through a hinging seat, the centers of the first shearing fork rod and the second shearing fork rod are hinged through a shearing fork main shaft, and the top end of the second shearing fork rod is hinged to the top operation platform through the hinging seat; the other ends of the first shearing fork rod and the second shearing fork rod are respectively in sliding fit with roller sliding grooves arranged on the top operation platform and the bottom frame through rollers; and a bottom mounting cross beam and a top mounting cross beam for mounting the hydraulic cylinder assembly are fixedly mounted between the first shearing fork rod and the second shearing fork rod.
The top operation platform comprises a platform frame, a platform plate is arranged on the platform frame, a platform guardrail is fixedly arranged on the periphery of the top of the platform frame, and a plurality of tool boxes are fixedly arranged on the top side wall of the platform guardrail.
The hydraulic cylinder assembly adopts a single-acting hydraulic cylinder and comprises a cylinder barrel, wherein the bottom of the cylinder barrel is encapsulated with a cylinder bottom plug through a cylinder bottom cover, a piston rod is arranged in the cylinder barrel, a piston is arranged at the end of the piston rod, a locking nut is fixed at the top of the cylinder barrel, an upper cylinder cover is fixed at the top of the locking nut, and a cylinder mechanical lock mechanism for locking the piston rod is arranged on the upper cylinder cover; an oil passage is processed in the center of the piston rod and is communicated with an oil inlet joint arranged at the end head of the piston rod, and the oil inlet joint is connected with an oil outlet pipe of the hand pump structure; the mechanical lock mechanism of the oil cylinder is matched with a thread groove processed on the locking piston rod.
A plurality of first sealing rings are arranged outside the cylinder bottom plug; and a plurality of second sealing rings are arranged outside the piston, and a guide ring is arranged between the two second sealing rings.
The mechanical lock mechanism of the oil cylinder comprises an outer shell, wherein a screw nut matched with a thread groove on a piston rod is supported and installed in the outer shell through a thrust ball bearing, a ratchet wheel is arranged outside the screw nut and matched with a pawl, the pawl is hinged on an ear seat on the side wall of the outer shell through a hinge bolt, the top of the screw nut is packaged in the outer shell through a gland, and the thrust ball bearing is arranged between the gland and the screw nut; a pawl matching groove for matching with the pawl is processed on the side wall of the outer shell; and a locking torsion spring is arranged on the hinge bolt and positioned between the outer shell and the pawl.
The tail of the pawl is hinged with a lever type unlocking mechanism for driving the pawl to rotate and unlock, the lever type unlocking mechanism comprises a hinge head hinged at the tail of the pawl, an unlocking stay wire is connected to the hinge head, the other end of the unlocking stay wire passes through a notch on a limiting plate, and the limiting plate is fixed on the side wall of the outer shell; the other end of the unlocking stay wire is connected with a manual stay wire mechanism for driving the unlocking stay wire to pull.
The manual wire pulling mechanism comprises a mounting bottom plate, wherein the mounting bottom plate is fixedly arranged on a top operation platform, locking positioning plates are symmetrically arranged at the top of the mounting bottom plate, a rotating sleeve is hinged to the locking positioning plates through handle bolts, a rotating handle is arranged at the top of the rotating sleeve in a sliding fit mode, a reset spring is arranged between the rotating handle and the rotating sleeve, a positioning pin is fixed on the side wall of the bottom of the rotating handle, passes through a vertical sliding groove on the rotating sleeve and is matched with a locking limiting groove on the locking positioning plates, a vertical rod is fixed on the side wall of the rotating sleeve, a wire pulling connector is hinged to the tail end of the vertical rod, and the wire pulling connector is connected with an unlocking wire of the lever type unlocking mechanism.
The hand pump structure comprises a manual pump fixed on the top operation platform, a crank is arranged on the manual pump, and an oil inlet of the manual pump is connected with an oil tank through an oil pipe; and an oil outlet of the manual pump is connected with an oil inlet joint of the hydraulic cylinder assembly through an oil pipe.
The bottom of the top operation platform is provided with a limit in-place sensor matched with the scissor lifting mechanism, and the limit in-place sensor is connected with an electromagnetic device for controlling oil supply of the hydraulic cylinder assembly and controls on-off of the hydraulic cylinder assembly.
The invention has the following beneficial effects:
1. through the hydraulic cylinder structure that adopts above-mentioned structure, it has the screw that is used for the auto-lock, when the piston rod rises the in-process, through the external screw thread on the piston rod with the internal screw thread of screw matched with, and then drive the screw and rotate, ratchet on the screw will cooperate with the pawl, guarantees that it can only rotate along a direction, and then effectually has prevented the piston rod reverse rotation, and then has played the purpose of auto-lock, and then has guaranteed hydraulic cylinder's security.
2. The aluminum bronze is selected as the silk parent material, so that the silk parent material can be effectively prevented from being rusted to influence the rotation of the silk parent material, and a one-way thrust ball bearing is respectively arranged on the contact surfaces of the upper end and the lower end of the silk parent material and is used for reducing the friction force of the silk parent rotation, so that the silk parent can flexibly rotate.
3. Lifting action can be realized through the shear fork lifting mechanism.
4. Through foretell hydro-cylinder mechanical lock mechanism can play the effect of auto-lock, when the piston rod normally rises the in-process, will drive the normal rotation of screw through the helicla flute, ratchet and pawl on the screw cooperate simultaneously, the normal rotation of ratchet has also been guaranteed, and then guarantee the normal lift of piston rod, and be unaffected, when breaking down at hydraulic system, perhaps the pneumatic cylinder subassembly breaks down, when unloading suddenly, the pawl will cooperate with the ratchet this moment, and then effectively prevent that it from taking place reverse rotation, and then carry out locking support to the piston rod, effectively prevent its danger of descending fast, carry out effectual support to top operation platform simultaneously.
5. The lever type unlocking mechanism with the structure can be used for unlocking the piston rod in the descending process of the top operation platform. The pawl is driven to rotate by unlocking the stay wire, so that the piston rod can drive the nut to normally rotate in the descending process, and the normal descending action of the nut can not be influenced.
Drawings
The invention is further described below with reference to the drawings and examples.
Fig. 1 is a first perspective three-dimensional view of the overall structure of the present invention.
Fig. 2 is a second perspective three-dimensional view of the overall structure of the present invention.
Fig. 3 is a third perspective three-dimensional view of the overall structure of the present invention.
Fig. 4 is a front view and partial cross-sectional view of a hydraulic cylinder assembly of the present invention.
Fig. 5 is a front view of the hydraulic cylinder assembly of the present invention.
Fig. 6 is an exploded view of the hydraulic cylinder assembly of the present invention.
Fig. 7 is a view A-A of fig. 4 in accordance with the present invention.
Fig. 8 is a first perspective three-dimensional view of the hydraulic cylinder assembly of the present invention.
Fig. 9 is a second perspective three-dimensional view of the hydraulic cylinder assembly of the present invention.
Fig. 10 is a third perspective, three-dimensional view of the hydraulic cylinder assembly of the present invention with the outer housing removed.
Fig. 11 is a first perspective three-dimensional view of the connection between the manual wire pulling mechanism and the cylinder mechanical lock mechanism of the present invention.
Fig. 12 is a second perspective three-dimensional view of the connection between the manual wire pulling mechanism and the cylinder mechanical lock mechanism of the present invention.
Fig. 13 is a third perspective three-dimensional view of the connection between the manual wire pulling mechanism and the cylinder mechanical lock mechanism of the present invention.
In the figure: the device comprises a bottom frame 1, a scissor lifting mechanism 2, a traction rod 3, a top operation platform 4, a hydraulic cylinder assembly 5, a hand pump structure 6, a manual wire pulling mechanism 7 and an oil cylinder mechanical lock mechanism 8;
a bottom frame 101, a screw support 102, a foot roller 103, a connecting frame 104, a ladder 105 and an armrest 106;
the device comprises a hinge seat 201, a first scissor rod 202, a roller 203, a second scissor rod 204, a roller chute 205, a scissor main shaft 206, a bottom mounting beam 207 and a top mounting beam 208;
a platform frame 401, a platform plate 402, a platform rail 403, and a tool box 404;
the cylinder barrel 501, the cylinder bottom plug 502, the first sealing ring 503, the cylinder bottom cover 504, the upper cylinder cover 505, the lock copper sleeve 506, the lock nut 507, the piston 508, the piston rod 509, the second sealing ring 5010, the guide ring 5011, the oil duct 5012, the oil inlet joint 5013 and the thread groove 5014;
an oil tank 601, a manual pump 602 and a crank 603;
mounting plate 701, locking positioning plate 702, handle bolt 703, locking limiting groove 704, rotating sleeve 705, rotating handle 706, positioning pin 707, vertical rod 708, and pull wire joint 709;
the device comprises an outer shell 801, a limiting plate 802, a pull rod 803, a hinge joint 804, a pawl 805, a locking torsion spring 806, an ear seat 807, a hinge bolt 808, a gland 809, a pawl mating groove 8010, a nut 8011, a thrust ball bearing 8012 and a ratchet 8013;
limit in place sensor 9.
Detailed Description
Embodiments of the present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1-7, an aviation hydraulic elevator comprises a bottom frame 1, wherein a top working platform 4 is supported and installed on the top of the bottom frame 1 through a scissor lifting mechanism 2, a hydraulic cylinder assembly 5 for lifting the top working platform 4 is installed on the scissor lifting mechanism 2, an oil cylinder mechanical lock mechanism 8 for self-locking the hydraulic cylinder assembly 5 is installed on the hydraulic cylinder assembly 5, and the hydraulic cylinder assembly 5 is connected with a hand pump structure 6 and provides hydraulic power to drive lifting action of the hydraulic cylinder assembly 5. The hydraulic elevator with the structure can be used for maintenance work in maintenance areas with heights of less than 4 meters, such as front equipment cabins, two sides of a fuselage, tails and the like, of aircraft for crew. The carrying personnel carry out the work of checking, lubricating, repairing, troubleshooting, debugging and the like during the checking and the regular maintenance before the aircraft is subjected to the preliminary mission preparation, the direct mission preparation, the re-departure mission preparation and the re-departure on the departure line. In the use, it drives pneumatic cylinder subassembly 5 through hand pump structure 6, and then cuts fork elevating system 2 through pneumatic cylinder subassembly 5 drive, finally goes up and down through cutting fork elevating system 2 drive top operation platform 4, and then reaches the effect that rises to the top. In the jacking process, the problem of rapid descent caused by sudden unloading of the hydraulic cylinder assembly 5 can be prevented by the oil cylinder mechanical lock mechanism 8, so that a good self-locking effect is achieved on the hydraulic cylinder assembly 5, and the safety of operation of the hydraulic cylinder assembly is ensured.
Further, the bottom frame 1 comprises a bottom frame 101, foot rollers 103 are installed at four corners of the bottom frame 101, screw supports 102 are installed on two side walls of the bottom frame 101 through brackets, a ladder stand 105 is fixedly installed on the head side wall of the bottom frame 101 through a connecting frame 104, handrails 106 are installed on the side faces of the ladder stand 105, and a traction rod 3 is hinged on the tail side wall of the bottom frame 101. The bottom frame 1 constructed as described above can be used to support the entire elevator.
Further, the scissor lifting mechanism 2 comprises a first scissor rod 202 hinged to the top of the bottom frame 1 through a hinging seat 201, the centers of the first scissor rod 202 and a second scissor rod 204 are hinged through a scissor main shaft 206, and the top end of the second scissor rod 204 is hinged to the top operation platform 4 through a hinging seat; the other ends of the first shearing fork rod 202 and the second shearing fork rod 204 respectively form sliding fit with a roller chute 205 arranged on the top operation platform 4 and the bottom frame 1 through rollers 203; a bottom mounting beam 207 and a top mounting beam 208 for mounting the hydraulic cylinder assembly 5 are fixedly mounted between the first scissor lever 202 and the second scissor lever 204. The scissor lift mechanism 2 can perform a lifting operation.
Further, the top working platform 4 includes a platform frame 401, a platform plate 402 is installed on the platform frame 401, a platform guard rail 403 is fixedly installed on the top periphery of the platform frame 401, and a plurality of tool boxes 404 are fixedly installed on the top side wall of the platform guard rail 403. The operator can be supported by the top work platform 4.
Further, the hydraulic cylinder assembly 5 adopts a single-acting hydraulic cylinder, and comprises a cylinder 501, wherein a cylinder bottom plug 502 is encapsulated at the bottom of the cylinder 501 through a cylinder bottom cover 504, a piston rod 509 is arranged in the cylinder 501, a piston 508 is installed at the end of the piston rod 509, a locking nut 507 is fixed at the top of the cylinder 501, an upper cylinder cover 505 is fixed at the top of the locking nut 507, and a cylinder mechanical lock mechanism 8 for locking the piston rod 509 is installed on the upper cylinder cover 505; an oil passage 5012 is formed in the center of the piston rod 509, the oil passage 5012 is communicated with an oil inlet joint 5013 arranged at the end head of the piston rod 509, and the oil inlet joint 5013 is connected with an oil outlet pipe of the hand pump structure 6; the cylinder mechanical lock mechanism 8 mates with a threaded slot 5014 machined into the locking piston rod 509. The hydraulic power can be provided for the whole elevator through the hydraulic cylinder assembly 5, so that the normal jacking action is ensured.
Further, a plurality of first sealing rings 503 are arranged outside the cylinder bottom plug 502; a plurality of second seal rings 5010 are provided outside the piston 508, and a guide ring 5011 is provided between the two second seal rings 5010. The hydraulic cylinder assembly 5 can be well sealed through the sealing ring.
Further, the mechanical lock mechanism 8 of the oil cylinder comprises an outer shell 801, a nut 8011 matched with a thread groove 5014 on the piston rod 509 is supported and installed inside the outer shell 801 through a thrust ball bearing 8012, a ratchet wheel 8013 is arranged outside the nut 8011, the ratchet wheel 8013 is matched with a pawl 805, the pawl 805 is hinged on an ear seat 807 on the side wall of the outer shell 801 through a hinge bolt 808, the top of the nut 8011 is packaged inside the outer shell 801 through a gland 809, and a thrust ball bearing is arranged between the gland 809 and the nut 8011; a pawl matching groove 8010 for matching with the pawl 805 is processed on the side wall of the outer shell 801; a locking torsion spring 806 is provided on the hinge bolt 808 between the outer housing 801 and the pawl 805. The cylinder mechanical lock mechanism 8 can play a role in self-locking, and the working principle is that when the piston rod 509 is normally lifted, the screw nut 8011 is driven to normally rotate through the thread groove 5014, meanwhile, the ratchet wheel 8013 on the screw nut 8011 is matched with the pawl 805, so that the normal rotation of the ratchet wheel 8013 is ensured, the normal lifting of the piston rod 509 is ensured, the ratchet wheel 8013 is not influenced, when a hydraulic system is failed, or the hydraulic cylinder assembly 5 is suddenly unloaded, the pawl 805 is matched with the ratchet wheel 8013 at the moment, the reverse rotation of the ratchet wheel 8013 is effectively prevented, the piston rod 509 is further locked and supported, the rapid descending danger of the piston rod 509 is effectively prevented, and meanwhile, the top operation platform 4 is effectively supported.
Further, the tail of the pawl 805 is hinged with a lever type unlocking mechanism for driving the pawl 805 to rotate and unlock, the lever type unlocking mechanism comprises a hinge head 804 hinged at the tail of the pawl 805, the hinge head 804 is connected with an unlocking pull wire 803, the other end of the unlocking pull wire 803 passes through a notch on a limiting plate 802, and the limiting plate 802 is fixed on the side wall of the outer shell 801; the other end of the unlocking pull wire 803 is connected with a manual pull wire mechanism 7 for driving the unlocking pull wire to pull. The lever type unlocking mechanism with the structure can be used for unlocking the piston rod 509 in the descending process of the top operation platform 4, and the unlocking stay 803 can drive the pawl 805 to rotate in the operation process, so that the piston rod 509 can drive the nut 8011 to normally rotate in the descending process without influencing the normal descending action of the piston rod.
Further, the manual wire pulling mechanism 7 includes a mounting bottom plate 701, the mounting bottom plate 701 is fixedly mounted on the top working platform 4, a locking positioning plate 702 is symmetrically mounted on the top of the mounting bottom plate 701, a rotating sleeve 705 is hinged on the locking positioning plate 702 through a handle bolt 703, a rotating handle 706 is mounted on the top of the rotating sleeve 705 in a sliding fit manner, a return spring is arranged between the rotating handle 706 and the rotating sleeve 705, a positioning pin 707 is fixed on the bottom side wall of the rotating handle 706, the positioning pin 707 penetrates through a vertical sliding groove on the rotating sleeve 705 and is matched with a locking limiting groove 704 on the locking positioning plate 702, a vertical rod 708 is fixed on the side wall of the rotating sleeve 705, a wire pulling connector 709 is hinged at the tail end of the vertical rod 708, and the wire pulling connector 709 is connected with an unlocking wire 803 of the lever unlocking mechanism. Through the above-mentioned manual stay wire mechanism 7 in the course of working, when the locking state between ratchet and the pawl needs to be released, through pressing rotation handle 706 for the bottom of locating pin 707 contacts the cooperation with locking spacing groove 704 arc groove, again manual operation rotation handle 706, drive rotation cover 705 through rotation handle 706 and rotate, drive vertical pole 708 by rotation cover 705 and rotate, and then drive stay wire joint 709 by vertical pole 708, drive unblock stay wire 803 by stay wire joint 709, finally drive pawl 805 rotation through unblock stay wire 803, make it break away from with the locking between the pawl 805, and then reach the purpose of releasing the locking.
Further, the hand pump structure 6 comprises a manual pump 602 fixed on the top working platform 4, a crank 603 is installed on the manual pump 602, and an oil inlet of the manual pump 602 is connected with an oil tank 601 through an oil pipe; the oil outlet of the manual pump 602 is connected with the oil inlet joint 5013 of the hydraulic cylinder assembly 5 through an oil pipe. Through the above-described hand pump structure 6, hydraulic power can be supplied to the hydraulic cylinder assembly 5.
Further, a limit in-place sensor 9 matched with the scissor lifting mechanism 2 is arranged at the bottom of the top operation platform 4, and the limit in-place sensor 9 is connected with an electromagnetic device for controlling oil supply of the hydraulic cylinder assembly 5 and controls on-off of the hydraulic cylinder assembly. The limit in-place sensor 9 ensures that the hydraulic system can be automatically controlled after the top working platform 4 reaches the highest position so as to stop the continuous oil supply and prevent the danger caused by continuous rising.
The working principle of the invention is as follows:
through the aviation hydraulic cylinder structure with the structure, in the working process, when the piston rod is lifted normally, the piston rod 509 drives the nut 8011 at the top of the piston rod to rotate, and the nut 8011 can only rotate along one direction and can not rotate reversely through the cooperation between the ratchet wheel 8013 on the nut 8011 and the pawl 805, so that the nut 8011 is always matched with the piston rod 509 to achieve the self-locking purpose;
when the locking state between the ratchet wheel and the pawl needs to be released, the bottom of the positioning pin 707 is contacted with the arc-shaped groove of the locking limit groove 704 by pressing the rotating handle 706, then the rotating handle 706 is manually operated, the rotating sleeve 705 is driven to rotate by the rotating handle 706, then the vertical rod 708 is driven to rotate by the rotating sleeve 705, then the stay wire joint 709 is driven by the vertical rod 708, then the unlocking stay wire 803 is driven by the stay wire joint 709, and finally the pawl 805 is driven to rotate by the unlocking stay wire 803, so that the locking between the pawl 805 and the unlocking stay wire 803 is released, and the purpose of releasing the locking is achieved.
Claims (4)
1. The utility model provides an aviation hydraulic elevator, it includes bottom frame (1), the top of bottom frame (1) is through cutting fork elevating system (2) support and is installed top operation platform (4), its characterized in that: the hydraulic cylinder assembly (5) for jacking the top operation platform (4) is arranged on the scissor lifting mechanism (2), the oil cylinder mechanical lock mechanism (8) for self-locking the hydraulic cylinder assembly (5) is arranged on the hydraulic cylinder assembly (5), and the hydraulic cylinder assembly (5) is connected with the hand pump structure (6) and provides hydraulic power to drive the jacking action of the hydraulic cylinder assembly (5);
the shearing fork lifting mechanism (2) comprises a first shearing fork rod (202) hinged to the top of the bottom frame (1) through a hinging seat (201), the centers of the first shearing fork rod (202) and a second shearing fork rod (204) are hinged through a shearing fork main shaft (206), and the top end of the second shearing fork rod (204) is hinged to the top operation platform (4) through the hinging seat; the other ends of the first shearing fork rod (202) and the second shearing fork rod (204) are respectively in sliding fit with a roller chute (205) arranged on the top operation platform (4) and the bottom frame (1) through rollers (203); a bottom mounting cross beam (207) and a top mounting cross beam (208) for mounting the hydraulic cylinder assembly (5) are fixedly mounted between the first shearing fork rod (202) and the second shearing fork rod (204);
the hydraulic cylinder assembly (5) adopts a single-acting hydraulic cylinder and comprises a cylinder barrel (501), a cylinder bottom plug (502) is packaged at the bottom of the cylinder barrel (501) through a cylinder bottom cover (504), a piston rod (509) is arranged in the cylinder barrel (501), a piston (508) is arranged at the end of the piston rod (509), a locking nut (507) is fixed at the top of the cylinder barrel (501), an upper cylinder cover (505) is fixed at the top of the locking nut (507), and a cylinder mechanical lock mechanism (8) for locking the piston rod (509) is arranged on the upper cylinder cover (505); an oil duct (5012) is processed at the center of the piston rod (509), the oil duct (5012) is communicated with an oil inlet joint (5013) arranged at the end head of the piston rod (509), and the oil inlet joint (5013) is connected with an oil outlet pipe of the hand pump structure (6); the oil cylinder mechanical lock mechanism (8) is matched with a thread groove (5014) formed on the locking piston rod (509);
a plurality of first sealing rings (503) are arranged outside the cylinder bottom plug (502); a plurality of second sealing rings (5010) are arranged outside the piston (508), and a guide ring (5011) is arranged between the two second sealing rings (5010);
the oil cylinder mechanical lock mechanism (8) comprises an outer shell (801), a nut (8011) matched with a thread groove (5014) on a piston rod (509) is supported and installed in the outer shell (801) through a thrust ball bearing (8012), a ratchet wheel (8013) is arranged outside the nut (8011), the ratchet wheel (8013) is matched with a pawl (805), the pawl (805) is hinged on an ear seat (807) on the side wall of the outer shell (801) through a hinge bolt (808), the top of the nut (8011) is packaged in the outer shell (801) through a gland (809), and the thrust ball bearing is arranged between the gland (809) and the nut (8011); a pawl matching groove (8010) used for matching with the pawl (805) is processed on the side wall of the outer shell (801); a locking torsion spring (806) is arranged on the hinge bolt (808) and positioned between the outer shell (801) and the pawl (805);
the tail of the pawl (805) is hinged with a lever type unlocking mechanism for driving the pawl to rotate and unlock, the lever type unlocking mechanism comprises a hinge joint (804) hinged at the tail of the pawl (805), the hinge joint (804) is connected with an unlocking pull wire (803), the other end of the unlocking pull wire (803) passes through a notch on a limiting plate (802), and the limiting plate (802) is fixed on the side wall of the outer shell (801); the other end of the unlocking stay wire (803) is connected with a manual stay wire mechanism (7) for driving the unlocking stay wire to pull;
manual stay wire mechanism (7) is including mounting plate (701), mounting plate (701) fixed mounting is on top operation platform (4), installs locking locating plate (702) at the top symmetry of mounting plate (701), it has rotation cover (705) to articulate on locking locating plate (702) through handle bolt (703), rotation handle (706) are installed to the top sliding fit of rotation cover (705), be provided with reset spring between rotation handle (706) and rotation cover (705), be fixed with locating pin (707) on the bottom lateral wall of rotation handle (706), vertical spout on rotation cover (705) is passed to cooperate with locking spacing groove (704) on locking locating plate (702), be fixed with vertical pole (708) on the lateral wall of rotation cover (705), the end of vertical pole (708) articulates there is stay wire joint (709), the unblock that stay wire joint (709) and lever unblock mechanism act as go-between (803).
2. An aircraft hydraulic elevator according to claim 1, wherein: the bottom frame (1) comprises a bottom frame (101), foot rollers (103) are arranged at four corners of the bottom frame (101), screw supports (102) are arranged on two side walls of the bottom frame (101) through brackets, a ladder stand (105) is fixedly arranged on the side wall of the head of the bottom frame (101) through a connecting frame (104), handrails (106) are arranged on the side surfaces of the ladder stand (105), and a traction rod (3) is hinged on the side wall of the tail of the bottom frame (101).
3. An aircraft hydraulic elevator according to claim 1, wherein: the top operation platform (4) comprises a platform frame (401), a platform plate (402) is arranged on the platform frame (401), a platform guardrail (403) is fixedly arranged on the periphery of the top of the platform frame (401), and a plurality of tool boxes (404) are fixedly arranged on the top side wall of the platform guardrail (403).
4. An aircraft hydraulic elevator according to claim 1, wherein: the hand pump structure (6) comprises a manual pump (602) fixed on the top operation platform (4), a crank (603) is arranged on the manual pump (602), and an oil inlet of the manual pump (602) is connected with an oil tank (601) through an oil pipe; an oil outlet of the manual pump (602) is connected with an oil inlet joint (5013) of the hydraulic cylinder assembly (5) through an oil pipe;
the bottom of the top operation platform (4) is provided with a limit in-place sensor (9) matched with the scissor lifting mechanism (2), and the limit in-place sensor (9) is connected with an electromagnetic device for controlling oil supply of the hydraulic cylinder assembly (5) and controls on-off of the hydraulic cylinder assembly.
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| CN201910376109.8A CN110104594B (en) | 2019-05-07 | 2019-05-07 | Aviation hydraulic elevator |
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| CN201910376109.8A CN110104594B (en) | 2019-05-07 | 2019-05-07 | Aviation hydraulic elevator |
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| CN110104594B true CN110104594B (en) | 2024-03-29 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3105202B1 (en) * | 2019-12-23 | 2021-12-31 | Haulotte Group | Scissor lift and method for determining the stability of such a platform |
| CN112158758A (en) * | 2020-09-24 | 2021-01-01 | 上海挚美航空设备有限公司 | Air source power driving type lifting working ladder |
| CN114634138B (en) * | 2022-03-21 | 2023-09-12 | 中车太原机车车辆有限公司 | Electric rail car capable of lifting operation |
| CN114835064B (en) * | 2022-05-19 | 2024-02-27 | 浙江瀚镪自动化设备股份有限公司 | Self-propelled scissor type aerial work platform |
| CN115215028B (en) * | 2022-07-06 | 2023-01-31 | 青岛宝佳智能装备股份有限公司 | Top supporting plate lifting mechanism of four-way vehicle for intelligent storage |
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