CN116690480A - Dismounting device and dismounting method for rear pivot pin of civil aviation main landing gear trolley beam - Google Patents
Dismounting device and dismounting method for rear pivot pin of civil aviation main landing gear trolley beam Download PDFInfo
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- CN116690480A CN116690480A CN202310665607.0A CN202310665607A CN116690480A CN 116690480 A CN116690480 A CN 116690480A CN 202310665607 A CN202310665607 A CN 202310665607A CN 116690480 A CN116690480 A CN 116690480A
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- rear pivot
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- head
- landing gear
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000006978 adaptation Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
Abstract
The invention discloses a dismounting device and a dismounting method for a rear pivot pin of a civil aviation main landing gear trolley beam, wherein the dismounting device comprises a limiting frame, a rotating frame, a screw rod, a limiting plate and a limiting nut; the limiting frame is provided with a first connecting joint and a fixed arm, and the first connecting joint is used for being sleeved on the limiting head of the rear pivot pin; the rotating frame is provided with a second connector and a rotating arm, the second connector is used for being sleeved on the annular lock piece of the rear pivot pin, the rotating arm is used for being matched with external equipment, and the limit nut is connected to the screw rod. The disassembly method utilizes the disassembly device to disassemble the rear pivot pin of the civil aviation main landing gear trolley beam on the original transport vehicle. The invention can be matched with external equipment, and can detach the rear pivot pin of the civil aviation main landing gear trolley beam more efficiently and stably.
Description
Technical Field
The invention relates to a dismounting device for a rear pivot pin of a civil aviation main landing gear trolley beam, and also relates to a dismounting method for the rear pivot pin of the civil aviation main landing gear trolley beam by utilizing the dismounting device.
Background
When the civil aviation wide body machine is parked, glided and lifted on the ground, the main landing gear bears main load, and the main landing gear is an important safety component on the civil aviation wide body machine. According to the MPD (maintenance planning data) requirement, the main landing gear must be disassembled for repair within 10 years of continuous operation.
When the main landing gear is reworked, the parts thereof need to be disassembled, wherein the rear pivot pin of the main landing gear trolley beam needs to be disassembled. As shown in fig. 1, a main landing gear bogie 100 is shown, and a rear pivot pin 101 is mounted at the rear end of the main landing gear bogie 100. As shown in fig. 2, the rear pivot pin 101 of the main landing gear trolley beam is provided with a middle hole 104, the rear pivot pin 101 is of a hollow structure, one end of the rear pivot pin 101 is provided with a limiting head 102, the limiting head 102 is of a regular polygon shape, the other end of the rear pivot pin 101 is provided with external threads, the annular lock piece 103 is connected to the external threads of the rear pivot pin 101 through a middle threaded hole, and the limiting plate 102 and the annular lock piece 103 are flat. The rear pivot pin 101 is threaded on the rear end of the main landing gear bogie 100 and is locked by an annular lock 103.
The rear pivot pin 101 of the main landing gear bogie 100 is very difficult to disassemble during repair, and generally requires a lot of time and labor, mainly due to the following reasons:
1. the main landing gear bogie beam 100 is large and heavy, and is difficult to be fixed on other equipment for disassembly, so that the existing practice is usually to disassemble by manpower;
2. after the main landing gear is used for a long time, the threaded connection part of the annular lock piece 103 of the rear pivot pin 101 can corrode and rust, so that the annular lock piece 103 is locked with the external threads at the end part of the rear pivot pin 101, and the rotation is difficult;
3. the limiting plate 102 and the annular locking piece 103 of the rear pivot pin 101 are flat, and in the process of disassembling by a tool, the connection between the tool and the limiting plate 102 and the annular locking piece 103 is easy to slip.
In order to cooperate with a overhauling personnel to disassemble the rear pivot pin of the main landing gear trolley beam, civil aviation aircraft manufacturers also provide special tools. As shown in fig. 3, the special tool provided by the civil aircraft manufacturer is two sleeves 105, and the two sleeves 105 are respectively sleeved on the limiting plate 102 and the annular lock 103 and then detached by manpower. However, it is difficult to rotate, and when the force is large, the sleeve 105 can easily slip off the limiting plate 102 and the annular lock member 103, so that the sleeve is difficult to disassemble, and time and force are consumed.
In order to save time and labor, the repairman has also resorted to removing the rear pivot pin in a destructive manner by means of tools, but this requires each time a new annular lock to be replaced, which is also very liable to damage other components, with a consequent considerable economic loss.
Disclosure of Invention
The invention aims to provide a dismounting device for the rear pivot pin of the civil aviation main landing gear trolley beam, which can be matched with external equipment to dismount the rear pivot pin of the civil aviation main landing gear trolley beam more efficiently and stably.
The second object of the invention is to provide a method for detaching the rear pivot pin of the civil aviation main landing gear trolley beam by using the detaching device, which is more convenient and faster to detach.
The first object of the present invention is achieved by the following technical scheme:
the utility model provides a dismounting device of back pivot pin of civil aviation owner's undercarriage dolly roof beam which characterized in that: the screw rod is penetrated in the middle hole of the rear pivot pin during disassembly, the limiting plate is sleeved on the end part of the screw rod penetrating out of the middle hole of the rear pivot pin, and the inner side surface of the limiting plate is provided with a second soft gasket; one end of the limiting frame is provided with a first connecting head which is used for being matched and sleeved on the limiting head of the rear pivot pin, a first cushion piece positioned on the fixing plate is close to the outer side surfaces of the first connecting head and the limiting head of the rear pivot pin during disassembly and is used for limiting the first connecting head to slip from the limiting head of the rear pivot pin, and the other end of the limiting frame is provided with a fixing arm which is used for being propped against the ground; one end of the rotating frame is provided with a second connector, the second connector is used for being matched and sleeved on the annular lock piece of the rear pivot pin, a second cushion piece positioned on the limiting plate is close to the outer side surfaces of the second connector and the annular lock piece of the rear pivot pin during disassembly and used for limiting the second connector to slip off from the annular lock piece of the rear pivot pin, the other end of the rotating frame is provided with a rotating arm which is used for being matched with external equipment, and the rotating arm is enabled to rotate by applying force to the rotating arm through the external equipment; the limiting nut is connected to the screw rod and is close to the outer side face of the limiting plate.
Preferably, the fixing arm is provided with an extension part, the extension part and the fixing arm are detachably connected together, and the connection angle of the extension part and the fixing arm can be adjusted.
Preferably, the end part of the fixing arm is provided with a polygonal connecting hole, the side surface of the end part of the lengthening part is provided with a polygonal connecting block, and the polygonal connecting block is tightly embedded into the polygonal connecting hole.
Preferably, a first sleeve hole is formed in the middle of the first connector, the shape of the first sleeve hole is matched with that of the limit head of the rear pivot pin, and the first sleeve hole is used for being matched and sleeved on the limit head of the rear pivot pin; the middle part of second connector is equipped with the second trepanning, and the shape of second trepanning is suitable with the shape looks adaptation of the annular lock of back pivot pin, and the second trepanning is used for the cooperation cover on the annular lock of back pivot pin.
Preferably, the first sleeve hole is tightly matched with the limit head of the rear pivot pin; the second set of holes is also a tight fit with the annular lock of the rear pivot pin.
Preferably, the length direction of the fixed arm is perpendicular to the center line of the first sleeve hole, and the length direction of the rotating arm is perpendicular to the center line of the second sleeve hole.
The second object of the invention is achieved by the following technical scheme:
the disassembly method for disassembling the rear pivot pin of the civil aviation main landing gear trolley beam by using the disassembly device is characterized by comprising the following steps of:
step one, a main landing gear trolley beam is kept to be placed on an original transport vehicle, and the position of the main landing gear trolley beam is adjusted so that a rear pivot pin is positioned at a horizontal position;
step two, the first connector of the limiting frame is sleeved on the limiting head of the rear pivot pin in a matched mode, the second connector of the rotating frame is sleeved on the annular lock piece of the rear pivot pin in a matched mode, the position of the rotating frame is adjusted, the rotating arm horizontally extends forwards to external equipment, the position of the limiting frame is adjusted, and one corner, far away from the rotating frame, of the fixed arm is propped against the ground; a screw rod is threaded through the middle hole of the rear pivot pin, a first cushion piece on the screw rod is close to the outer side surfaces of the first connector and the limiting head of the rear pivot pin, a limiting plate is sleeved on the screw rod, a second cushion piece on the limiting plate is close to the outer side surfaces of the second connector and the annular locking piece of the rear pivot pin, a limiting nut is connected to the screw rod, and the limiting nut is close to the outer side surfaces of the limiting plate;
starting external equipment, wherein the external equipment downwards applies force to a rotating arm of a rotating frame, the rotating frame slowly rotates, and finally, the annular lock piece of the rear pivot pin is loosened, and the adjacent second soft gasket is compressed;
and step four, loosening the limit nut, continuing to rotate the annular lock piece of the rear pivot pin through the rotating frame, and finally detaching the annular lock piece from the rear pivot pin.
Preferably, the external device is a press, and in the second step, the rotating arm extends horizontally forward below a ram of the press, and a downward force is applied to the rotating arm of the turret by the ram moving downward.
Compared with the prior art, the invention has the following beneficial effects:
according to the dismounting device, the limiting frame and the rotating frame are sleeved on the limiting head of the rear pivot pin and the annular lock piece in a matched mode to dismount, when the dismounting device is dismounted, the fixed arm of the limiting frame is propped against the ground to limit the rotation of the rear pivot pin, the larger torsion force during dismounting is counteracted by propping against the ground, the rotating arm of the rotating frame is matched with external equipment, so that the rear pivot pin can be dismounted through the external equipment, the external equipment can apply strong force to dismount, and the rear pivot pin which is large in size and is bitten by corroded threads after long-time use can be dismounted easily, so that the dismounting device is high in efficiency, and is labor-saving and time-saving.
When the rear pivot pin is detached, the first connector and the second connector are limited through the first soft gasket on the fixed plate and the second soft gasket on the limiting plate, so that the first connector and the second connector are prevented from slipping off from the limiting head and the annular lock piece of the rear pivot pin when force is applied, and the rear pivot pin can be detached stably and safely.
The dismounting method utilizes the dismounting device, and during dismounting, the civil aviation main landing gear trolley beam can be directly kept to be placed on the original transport vehicle for dismounting the rear pivot pin, so that the transport is not needed, and a bracket is not needed to be additionally designed, so that the dismounting is more convenient and quicker.
The first soft gasket and the second soft gasket can prevent slipping during disassembly, and can ensure that the annular lock piece can be loosened and not blocked completely during disassembly. In addition, the first soft gasket and the second soft gasket can also protect the rear pivot pin, so that parts of the rear pivot pin are prevented from being damaged during disassembly.
Drawings
FIG. 1 is a schematic perspective view of a main landing gear trolley beam of a civil aircraft;
FIG. 2 is a schematic perspective view of the rear pivot pin on the main landing gear bogie beam;
FIG. 3 is a schematic perspective view of one of the sleeves of the prior art for removing a rear pivot pin;
FIG. 4 is a perspective view of the dismounting device of the invention (the limit nut is not shown in the figure, and the structure of the limit nut is the same as that of a conventional nut);
FIG. 5 is a schematic illustration of the present invention with the rear pivot pin on the main landing gear dolly removed, with other components of the main landing gear dolly omitted;
FIG. 6 is a schematic side view of the present invention with the rear pivot pin on the main landing gear bogie removed.
The meaning of the reference numerals in the figures:
1-a screw rod; 1.1-a fixing plate; 1.2-a first soft pad; 2-a limiting frame; 2.1-a first connector; 2.2-a first set of holes; 2.3-lengthening part; 2.4-polygonal connecting blocks; 2.5-polygonal connecting holes; 2.6-a fixed arm; 3-rotating frame; 3.1-a second connector; 3.2-a second set of holes; 3.3-rotating arms; 4-limiting plates; 4.1-a second soft pad; 5-limiting nuts; 100-main landing gear trolley beams; 101-a rear pivot pin; 102-a positioning head; 103-an annular lock; 104-mesopores; 105-sleeve.
Detailed Description
The invention is further described below with reference to examples.
In the description of the present invention, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present invention and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present invention can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
Examples:
as shown in fig. 4 to 6, the dismounting device for the rear pivot pin of the civil aviation main landing gear trolley beam of the present embodiment includes a limiting frame 2, a rotating frame 3, a screw rod 1, a limiting plate 4 and a limiting nut 5.
The screw rod 1 is a straight rod, and the outer wall is provided with threads. One end of the screw rod 1 is provided with a fixing plate 1.1, the fixing plate 1.1 is a circular plate and is perpendicular to the axis of the screw rod 1, the inner side surface of the fixing plate 1.1 is provided with a first soft gasket 1.2, and the inner side surface of the fixing plate 1.1 is the side surface facing the rear pivot pin 101 during disassembly. During disassembly, the screw rod 1 is inserted into the middle hole 104 of the rear pivot pin 101 for use.
The limiting plate 4 is a circular plate, the limiting plate 4 is sleeved on the end part of the screw rod 1, which penetrates out of the middle hole 104 of the rear pivot pin 101, through the middle hole of the limiting plate 4, the limiting plate 4 can move at the end part of the screw rod 1, the inner side surface of the limiting plate 4 is provided with a second soft gasket 4.1, and the inner side surface of the limiting plate 4 faces the side surface of the rear pivot pin 101 during disassembly.
One end of the limiting frame 2 is provided with a first connecting head 2.1, the middle part of the first connecting head 2.1 is provided with a first sleeve hole 2.2, the shape of the first sleeve hole 2.2 is matched with that of the limiting head 102 of the rear pivot pin 101, and the first sleeve hole 2.2 is used for being matched and sleeved on the limiting head 102 of the rear pivot pin 101. During disassembly, the first sleeve hole 2.2 is in tight fit with the limiting head 102 of the rear pivot pin 101, so that the first connecting head 2.1 is not easy to loosen during disassembly, the first soft gasket 1.2 positioned on the fixed plate 1.1 during disassembly is close to the outer side surfaces of the first connecting head 2.1 and the limiting head 102 of the rear pivot pin 101 and used for limiting the first connecting head 2.1 to slip from the limiting head 102 of the rear pivot pin 101, and the close means that the first soft gasket 1.2 is not tightly pressed on the first connecting head 2.1 and the limiting head 102 and can move to a certain extent. The other end of the limiting frame 2 is provided with a fixed arm 2.6, the fixed arm 2.6 extends outwards, and the length direction of the fixed arm 2.6 is perpendicular to the center line of the first sleeve hole 2.2. When the fixed arm 2.6 is detached, the fixed arm is used for propping against the ground, and the larger torsion during detachment is counteracted by propping against the ground.
One end of the rotating frame 3 is provided with a second connector 3.1, the middle part of the second connector 3.1 is provided with a second sleeve hole 3.2, the shape of the second sleeve hole 3.2 is matched with that of the annular lock piece 103 of the rear pivot pin 101, and the second sleeve hole 3.2 is used for being matched and sleeved on the annular lock piece 103 of the rear pivot pin 101. During disassembly, the second sleeve hole 3.2 is in tight fit with the annular locking piece 103 of the rear pivot pin 101, so that the second connector 3.1 is not easy to loosen during disassembly, the second soft gasket 4.1 positioned on the limiting plate 4 is close to the outer side surfaces of the second connector 3.1 and the annular locking piece 103 of the rear pivot pin 101 and used for limiting the second connector 3.1 to slip from the annular locking piece 103 of the rear pivot pin 101, the second soft gasket 4.1 is not tightly pressed on the second connector 3.1 and the annular locking piece 103, and the second soft gasket can move to a certain extent, so that the rotation of the annular locking piece 103 during disassembly and the outward displacement of the annular locking piece 103 during loosening are not hindered. The other end of the rotating frame 3 is provided with a rotating arm 3.3, the rotating arm 3.3 extends outwards, and the length direction of the rotating arm 3.3 is perpendicular to the center line of the second sleeve hole 3.2. When detached, the rotating arm 3.3 extends into the external device for cooperation with the external device, and a force is applied to the rotating arm 3.3 by the external device so that the rotating frame 3 rotates. The external device may be a conventional press machine on which there is a press head moving downward to press, and upon removal, the rotating arm 3.3 extends horizontally forward below the press head of the press machine, and a downward force is applied to the rotating arm 3.3 of the turret 3 by the press head moving downward.
As shown in fig. 5, when the screw rod is detached, the limit nut 5 is connected to the end portion of the screw rod 1 penetrating out of the middle hole 104 of the rear pivot pin 101, the limit nut 5 is close to the outer side surface of the limit plate 4, the limit plate 4 is still movable to a certain extent when the limit nut 5 is not locked tightly.
The limiting frame 2 and the rotating frame 3 of the embodiment are processed by metal plates with certain plate thickness, and the first sleeve holes 2.2 and the second sleeve holes 3.2 are processed according to the shapes of the limiting head 102 and the annular locking piece 103 of the rear pivot pin 101.
The fixed arm 2.6 of this embodiment is provided with the extension portion 2.3, and the extension portion 2.3 is in detachable connection with the fixed arm 2.6 together, and the connection angle of extension portion 2.3 and fixed arm 2.6 can be adjusted, and fixed arm 2.6 comes to prop up subaerial through extension portion 2.3. The length of the fixed arm 2.6 can be delayed through the lengthening part 2.3, so that the fixed arm can be adjusted according to the height, and the fixed arm can be better propped against the ground.
The specific structure of the connection of the lengthening part 2.3 and the fixed arm 2.6 is as follows: the tip of fixed arm 2.6 is equipped with polygon connecting hole 2.5, and the tip side of extension 2.3 is equipped with polygon connecting block 2.4, and polygon connecting hole 2.5's size and polygon connecting block 2.4's size looks adaptation, and polygon connecting block 2.4 can closely inlay into polygon connecting hole 2.5. The connection angle between the lengthening part 2.3 and the fixed arm 2.6 can be adjusted by adjusting the connection angle between the polygonal connecting block 2.4 and the polygonal connecting hole 2.5.
The embodiment also discloses a disassembly method for disassembling the rear pivot pin of the civil aviation main landing gear trolley beam by using the disassembly device, which comprises the following steps:
step one, the main landing gear trolley beam 100 of civil aviation is kept to be placed on an original transport vehicle, wherein the transport vehicle is a conventional vehicle for transporting and moving the main landing gear trolley beam of civil aviation; the disassembly method is that the rear pivot pin 101 on the disassembly main landing gear trolley beam 100 is directly carried out on the original transport vehicle, so that the civil aviation main landing gear trolley beam 100 is not required to be carried; for the position of the rear pivot pin 101, it is necessary to adjust the position of the civil aviation main landing gear bogie beam 100 such that the rear pivot pin 101 is in a horizontal position, such as a rotational adjustment;
step two, as shown in fig. 5 (other parts of the main landing gear trolley beam 100 are omitted in the figure, the rear pivot pin 101 is still fixed on the main landing gear trolley beam 100 during actual disassembly), the first connector 2.1 of the limiting frame 2 is matched and sleeved on the limiting head 102 of the rear pivot pin 101, the inner side surface of the first connector 2.1 is close to the end part of the main landing gear trolley beam 100, the second connector 3.1 of the rotating frame 3 is matched and sleeved on the annular lock piece 103 of the rear pivot pin 101, and the inner side surface of the second connector 3.1 is also close to the end part of the main landing gear trolley beam 100; as shown in fig. 6, the position of the turret 3 is adjusted so that the rotating arm 3.3 extends horizontally forward into the external device, the position of the restricting frame 2 is adjusted so that a corner of the elongated portion 2.3 on the fixed arm 2.6, which is away from the turret 3.3, abuts against the ground B (when the elongated portion 2.3 is not used, a corner of the fixed arm 2.6, which is away from the turret 3.3 abuts against the ground B), so that the elongated portion 2.3 on the fixed arm 2.6 can remain against the ground B when a downward force is applied to the rotating arm 3.3 (arrow a in the figure is a direction in which the external device applies a downward force to the rotating arm 3.3); then, threading the screw rod 1 on the middle hole 104 of the rear pivot pin 101, enabling the first soft gasket 102 on the screw rod 1 to be close to the first connector 2.1 and the outer side surface of the limit head 102 of the rear pivot pin 101, sleeving the limit plate 4 on the screw rod, enabling the second soft gasket 4.1 on the limit plate 4 to be close to the second connector 3.1 and the outer side surface of the annular lock piece 103 of the rear pivot pin 101, enabling the limit nut 5 to be connected to the screw rod 1, enabling the limit nut 5 to be close to the outer side surface of the limit plate 4, and enabling the limit nut 5 not to be locked tightly;
wherein the external equipment is a press machine, the rotating arm 3.3 horizontally extends forward to the lower surface of a press head of the press machine, and downward force is applied to the rotating arm 3.3 of the rotating frame 3 through the downward moving press head;
starting external equipment, wherein the external equipment downwards applies force to the rotating arm 3.3 of the rotating frame 3, the rotating frame 3 slowly rotates, and finally the annular lock piece 103 of the rear pivot pin 101 is loosened, and the adjacent second soft gasket 4.1 is compressed;
step four, loosening the limit nut 5, continuing to rotate the annular locking piece 103 of the rear pivot pin 101 through the rotating frame 3, switching to manual rotation of the annular locking piece 103 after the annular locking piece 103 is completely loosened, and finally detaching the annular locking piece 103 from the rear pivot pin 101.
The invention has been successfully tried to repair the main landing gear of a plurality of sets of civil aviation wide body machines, has good field effect and can quickly remove the rear pivot pin.
The above-mentioned embodiments of the present invention are not intended to limit the scope of the present invention, and the embodiments of the present invention are not limited thereto, and all kinds of modifications, substitutions or alterations made to the above-mentioned structures of the present invention according to the above-mentioned general knowledge and conventional means of the art without departing from the basic technical ideas of the present invention shall fall within the scope of the present invention.
Claims (8)
1. The utility model provides a dismounting device of back pivot pin of civil aviation owner's undercarriage dolly roof beam which characterized in that: the screw rod is sleeved on the end part of the screw rod, which penetrates out of the middle hole of the rear pivot pin, and the inner side surface of the limiting plate is provided with a second soft gasket; one end of the limiting frame is provided with a first connecting head which is used for being matched and sleeved on the limiting head of the rear pivot pin, a first cushion piece positioned on the fixing plate is close to the outer side surfaces of the first connecting head and the limiting head of the rear pivot pin during disassembly and is used for limiting the first connecting head to slip off from the limiting head of the rear pivot pin, the other end of the limiting frame is provided with a fixing arm, and the fixing arm is used for propping against the ground; the rotating frame comprises a rotating frame, a limiting plate, a first cushion piece, a second cushion piece, a first connecting head, a second connecting head, a rotating arm and an external device, wherein the rotating frame is provided with the first connecting head, the second connecting head is arranged at one end of the rotating frame, the second connecting head is used for being matched and sleeved on an annular lock piece of the rear pivot pin, a second cushion piece arranged on the limiting plate is close to the outer side surfaces of the second connecting head and the annular lock piece of the rear pivot pin during disassembly, the second connecting head is used for limiting the second connecting head to slip from the annular lock piece of the rear pivot pin, the rotating arm is arranged at the other end of the rotating frame and is used for being matched with the external device, and force is applied to the rotating arm through the external device so that the rotating frame rotates; the limiting nut is connected to the screw rod, and the limiting nut is close to the outer side face of the limiting plate.
2. The dismounting device for the rear pivot pin of a civil aviation main landing gear trolley beam of claim 1, wherein: the fixed arm is provided with an extension part, the extension part is detachably connected with the fixed arm, and the connection angle of the extension part and the fixed arm can be adjusted.
3. The dismounting device for the rear pivot pin of a civil aviation main landing gear trolley beam of claim 2, wherein: the end part of the fixed arm is provided with a polygonal connecting hole, the side surface of the end part of the lengthened part is provided with a polygonal connecting block, and the polygonal connecting block is tightly embedded into the polygonal connecting hole.
4. The dismounting device for the rear pivot pin of a civil aviation main landing gear trolley beam of claim 1, wherein: the middle part of the first connector is provided with a first sleeve hole, the shape of the first sleeve hole is matched with the shape of the limit head of the rear pivot pin, and the first sleeve hole is used for being matched and sleeved on the limit head of the rear pivot pin; the middle part of second connector is equipped with the second trepanning, the shape of second trepanning and the shape looks adaptation of the annular locking piece of back pivot pin, the second trepanning is used for the cooperation cover on the annular locking piece of back pivot pin.
5. The removing device for the rear pivot pin of the civil aviation main landing gear trolley beam according to claim 4, wherein: the first sleeve hole is tightly matched with the limit head of the rear pivot pin; the second set of holes is also a tight fit with the annular lock of the rear pivot pin.
6. The removing device for the rear pivot pin of the civil aviation main landing gear trolley beam according to claim 4, wherein: the length direction of the fixed arm is perpendicular to the center line of the first sleeve hole, and the length direction of the rotating arm is perpendicular to the center line of the second sleeve hole.
7. A method of dismantling the rear pivot pin of a civil aviation main landing gear trolley beam using the dismantling device of any one of claims 1 to 6, comprising the steps of:
step one, a main landing gear trolley beam is kept to be placed on an original transport vehicle, and the position of the main landing gear trolley beam is adjusted so that a rear pivot pin is positioned at a horizontal position;
step two, the first connector of the limiting frame is sleeved on the limiting head of the rear pivot pin in a matched mode, the second connector of the rotating frame is sleeved on the annular lock piece of the rear pivot pin in a matched mode, the position of the rotating frame is adjusted, the rotating arm horizontally extends forwards to external equipment, the position of the limiting frame is adjusted, and one corner, far away from the rotating frame, of the fixed arm is propped against the ground; the screw rod is penetrated through the middle hole of the rear pivot pin, a first soft cushion piece on the screw rod is close to the outer side surfaces of the first connector and the positioning head of the rear pivot pin, the limiting plate is sleeved on the screw rod, a second soft cushion piece on the limiting plate is close to the outer side surfaces of the second connector and the annular locking piece of the rear pivot pin, the limiting nut is connected to the screw rod, and the limiting nut is close to the outer side surfaces of the limiting plate;
starting external equipment, wherein the external equipment applies downward force to a rotating arm of the rotating frame, the rotating frame slowly rotates, and finally the annular lock piece of the rear pivot pin is loosened, and the second soft gasket close to the annular lock piece is compressed;
and step four, loosening the limit nut, continuing to rotate the annular lock piece of the rear pivot pin through the rotating frame, and finally detaching the annular lock piece from the rear pivot pin.
8. The disassembly method as claimed in claim 7, wherein: in the second step, the rotating arm extends horizontally and forwards to the lower surface of a pressing head of the pressing machine, and downward force is applied to the rotating arm of the rotating frame through the pressing head moving downwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310665607.0A CN116690480A (en) | 2023-06-06 | 2023-06-06 | Dismounting device and dismounting method for rear pivot pin of civil aviation main landing gear trolley beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310665607.0A CN116690480A (en) | 2023-06-06 | 2023-06-06 | Dismounting device and dismounting method for rear pivot pin of civil aviation main landing gear trolley beam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116690480A true CN116690480A (en) | 2023-09-05 |
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ID=87823252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310665607.0A Pending CN116690480A (en) | 2023-06-06 | 2023-06-06 | Dismounting device and dismounting method for rear pivot pin of civil aviation main landing gear trolley beam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116690480A (en) |
-
2023
- 2023-06-06 CN CN202310665607.0A patent/CN116690480A/en active Pending
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