CN104858638A - Disassembly technological equipment of main undercarriage axle sleeves and brake sleeves of 737NG series aircrafts - Google Patents
Disassembly technological equipment of main undercarriage axle sleeves and brake sleeves of 737NG series aircrafts Download PDFInfo
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- CN104858638A CN104858638A CN201510183968.7A CN201510183968A CN104858638A CN 104858638 A CN104858638 A CN 104858638A CN 201510183968 A CN201510183968 A CN 201510183968A CN 104858638 A CN104858638 A CN 104858638A
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- hydraulic cylinder
- wheel shaft
- brake cover
- brake
- axle sleeve
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/02—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same
- B23P19/027—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same using hydraulic or pneumatic means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/02—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same
- B23P19/025—For detaching only
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P2700/00—Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
- B23P2700/01—Aircraft parts
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The invention provides disassembly technological equipment of main undercarriage axle sleeves and brake sleeves of 737NG series aircrafts. The disassembly technological equipment comprises a brake sleeve positioning plate, a brake sleeve-disassembling broaching module, a driving hydraulic cylinder, a hydraulic cylinder mounting base, an aluminous heel block, at least two pull rods and a sleeve body, wherein a broaching is matched with a brake sleeve disassembling hole; the brake sleeve positioning plate and the hydraulic cylinder mounting base are all provided with through holes; each pull rod all penetrates through two through holes; the brake sleeve positioning plate and the hydraulic cylinder mounting base are limited on the pull rods through nuts; the sleeve body comprises a cylinder part and a flange and two half bodies connected face to face. When the equipment is used, the sleeve body sleeves an axle, the flange end of the sleeve body is in contact with the inner end surface of an axle sleeve, the brake sleeve positioning plate sleeves the cylinder part, and the inner diameter of the center hole of the brake sleeve positioning plate is smaller than the outer diameter of the flange; when in disassembly, the hydraulic cylinder mounting base is positioned on the outer side of the outer end of the main undercarriage axle, a position rod presses the aluminous heel block on the outer end of the main undercarriage axle to convey the acting force to the main undercarriage axle through the aluminous heel block.
Description
Technical field
The invention relates to 737NG series aircraft main landing gear wheel shaft axle sleeve, brake cover is removed and decomposed, and is specifically related to 737NG series aircraft main landing gear wheel shaft axle sleeve and brake cover disassembling fixture.
Background technology
When 737NG series aircraft main landing gear wheel shaft axle sleeve and brake cover are removed and decomposed, in relevant Boeing's servicing manual, give specific purpose tool (as depicted in figs. 1 and 2).But through aircraft in the process of long-term operation, main landing gear 1 wheel shaft axle sleeve and brake cover 10 do work owing to repeatedly braking at a high speed and are subject to the repeatedly effect of thermal stress, make it tight with coordinating of wheel shaft, when therefore removing decomposition, if with the specific purpose tool provided in handbook, its pull bar and supporting latch intensity generally do not reach actual requirement, thus cause instrument to be drawn bad situation to happen occasionally.As shown in Figure 2 simultaneously, when removing wheel shaft axle sleeve, draw pin to contact power transmission with the fabrication hole of wheel shaft axle sleeve by the wheel shaft axle sleeve dismounting on specific purpose tool to have come, because the fabrication hole different diameters great disparity of drawing pin diameter and wheel shaft axle sleeve removed by wheel shaft axle sleeve, their actual contacts are point cantact power transmission, contact area is little, and stress is large, often causes the damage of instrument and parts under large pulling force.
737NG series aircraft is removed and is decomposed main landing gear wheel shaft axle sleeve and brake cover, common way is: first utilize the specific purpose tool provided in handbook to remove brake cover, general brake cover is little with the tight fit contact area of wheel shaft, and the technique internal diameter that brake puts draws the external diameter of pin assemblies 3 to match with the brake cover dismounting be installed on brake cover positioning disk 2, contact area is larger comparatively speaking, with the use of hydraulic hand-pump 7 and hydraulic jack 6, substantially can complete and disassemble by the specific purpose tool recommended of service manual, minority cannot be removed, can use outside heat expand method complete brake cover dismounting, connecting bolt 4 just on pull bar 5 is easily damaged with its installing hole.But when tearing wheel shaft axle sleeve open, if the specific purpose tool provided in service manual, it is two that utilize any symmetry on wheel shaft axle sleeve in six large fabrication holes, remove draw pin assemblies 8 and large fabrication hole contact internal walls stressed by being installed in wheel shaft axle sleeve on wheel shaft axle sleeve positioning disk 9, the opposition produced by hydraulic jack thus wheel shaft axle sleeve is pulled up from wheel shaft pull-up.But removing because of wheel shaft axle sleeve draws different diameters between pin and fabrication hole too large, and contact surface is too little, and wheel shaft and wheel shaft axle sleeve coordinate closely, therefore the phenomenon that damage fabrication hole also cannot remove wheel shaft axle sleeve very easily occurs in addition.Common way changes a pair trial again after damage a pair fabrication hole to disassemble, when three pairs of fabrication holes all damage also cannot remove time, just brake cover can only be cut and do destructive dismounting, and while fabrication hole damages, wheel shaft axle sleeve also can be caused to remove the damage of drawing pin, destroying in the process of removing the risk being easy to occur damage wheel shaft.Usually when destructiveness is removed, need 3 people to coordinate more than two days used time, inspection, order cycle time will be had a strong impact on, thus affect aircraft maintenance and go out the field duration.
Therefore, tradition removes decomposition method following shortcoming:
1) pull out difficulty, efficiency is low, and very easily generation part damage and injury, affect aircraft and go out the field duration, destroys the resolving time more than 2 days when meeting difficulty;
2) forced contact face is little, easily produces the derivative risk personnel that cause and injure under the large pressure of 100000PSI;
3) destroy the risk that there is damage wheel shaft in the process of removing wheel shaft axle sleeve, once damage wheel shaft, may need to order goods and change, but the difficulty of order, very easily cause aircraft Inspection cycle to incur loss through delay.
Summary of the invention
The invention provides a kind of 737NG series aircraft main landing gear wheel shaft axle sleeve and brake cover disassembling fixture, reduce personnel labor intensity, reduce aircraft damage risk, reduce tool damage risk, make disassemble and assemble work safe and convenient.
In order to solve the problems of the technologies described above, technical scheme of the present invention is:
A kind of 737NG series aircraft main landing gear wheel shaft axle sleeve and brake cover disassembling fixture,
Comprising brake cover positioning disk and pin assemblies is drawn in the brake cover dismounting be installed on brake cover positioning disk, brake cover is removed and is drawn the pin that draws of pin assemblies to remove hole and coordinate with braking to overlap;
Also comprise and drive hydraulic cylinder, the hydraulic cylinder mount pad installing driving hydraulic cylinder, aluminium matter cushion block and at least two pull bars, brake is overlapped positioning disk and hydraulic cylinder mount pad is all had the through hole that for pull bar wear identical with pull bar quantity, every root pull bar all runs through a through hole on brake cover positioning disk and hydraulic cylinder mount pad, realizes braking overlap positioning disk and hydraulic cylinder mount pad is limited on pull bar by being positioned at the nut that pull bar coordinates with pull rod screw;
Also comprise body, body comprises the flange of cylindrical portion and the formation of cylindrical portion one end, body is formed by two halfbodies are involutory, during use, body is placed on wheel shaft, the inner end face of body flange end contact wheel shaft axle sleeve outwards to extrude wheel shaft axle sleeve under axial force, and brake cover positioning disk sleeve is in cylindrical portion, and brake cover positioning disk centre bore internal diameter is less than flange outside diameter; During dismounting, hydraulic cylinder mount pad is positioned at the outside of main landing gear wheel shaft outer end, drives the piston rod of hydraulic cylinder to be pressed in by aluminium matter cushion block active force is led to peraluminous cushion block by main landing gear wheel shaft outer end to pass to main landing gear wheel shaft.
Above-mentioned 737NG series aircraft main landing gear wheel shaft axle sleeve and brake cover disassembling fixture,
Wheel shaft centre bore is placed in wheel shaft axle sleeve alignment pin to be ejected the dismounting hydraulic cylinder of dismounting when also comprising use, the support portion that dismounting hydraulic cylinder is supported in wheel shaft center bore inner wall has can make dismounting hydraulic cylinder and wheel shaft center bore inner wall coincide the external cylindrical surface contacted, aluminium matter support is relative fixing with the cylinder body of dismounting hydraulic cylinder, aluminium matter support has the pilot hole for steel ejector pin guiding, steel ejector pin is held in pilot hole by aluminium matter support, pilot hole is positioned at dismounting hydraulic cylinder piston rod and stretches out dead ahead, direction and pilot hole bearing of trend is with dismantling hydraulic cylinder piston rod that to stretch out direction consistent, dismounting hydraulic cylinder piston rod drives the motion of steel ejector pin.
Above-mentioned 737NG series aircraft main landing gear wheel shaft axle sleeve and brake cover disassembling fixture, the both ends of pull bar all have thread segment and guiding polished rod section, guiding polished rod section is positioned at inside thread segment, nut coordinates with thread segment, brake cover positioning disk and hydraulic cylinder mount pad correspondence are positioned in two guiding polished rod sections of every root pull bar, be provided with the spacing shaft shoulder and move to stop in brake cover positioning disk and hydraulic cylinder mount pad inside guiding polished rod section.
Above-mentioned 737NG series aircraft main landing gear wheel shaft axle sleeve and brake cover disassembling fixture, hydraulic cylinder mount pad is disc, hydraulic cylinder mount pad has screwed hole of centre, drive the connecting portion of hydraulic cylinder to be threaded with screwed hole of centre and realize driving the installation of hydraulic cylinder and hydraulic cylinder mount pad, through hole on screwed hole of centre and hydraulic cylinder mount pad all extends along the axial direction of hydraulic cylinder mount pad, whole through holes on hydraulic cylinder mount pad annular centered by screwed hole of centre is uniform, accordingly, whole through holes on brake cover positioning disk annular centered by the cover positioning disk centre bore that brakes is uniform.
Above-mentioned 737NG series aircraft main landing gear wheel shaft axle sleeve and brake cover disassembling fixture, on the inner surface of brake cover positioning disk centre bore, annular is evenly equipped with multiple Teflon cushion block.
Above-mentioned 737NG series aircraft main landing gear wheel shaft axle sleeve and brake cover disassembling fixture, flange has the breach avoiding flange and pull bar to interfere when body and brake cover positioning disk coordinate, the quantity pull bar quantity of breach is consistent.
Above-mentioned 737NG series aircraft main landing gear wheel shaft axle sleeve and brake cover disassembling fixture, the relative two sides of brake cover positioning disk are equipped with and the installing hole drawing pin to be slidably matched, and each brake cover is removed and is drawn the pressing plate of pin assemblies to be fixed on the relative two sides of brake cover positioning disk respectively by two screws.
Above-mentioned 737NG series aircraft main landing gear wheel shaft axle sleeve and brake cover disassembling fixture, draw pin one end to have and overlap the polished rod section of removing hole and being slidably matched with brake, the other end has thread segment, inside polished rod section, there is the spacing shaft shoulder, there is inside thread segment the spacing shaft shoulder, thread segment wear pressing plate and by nut by pressing plate with draw pin to fix.
Above-mentioned 737NG series aircraft main landing gear wheel shaft axle sleeve and brake cover disassembling fixture, draw pin one end to have and overlap the polished rod section of removing hole and being slidably matched with brake, the installing hole interference fit on the other end and pressing plate, has the spacing shaft shoulder inside polished rod section.
Above-mentioned 737NG series aircraft main landing gear wheel shaft axle sleeve and brake cover disassembling fixture, aluminium matter cushion block realizes driving hydraulic cylinder and wheel shaft assignment, the cylinder boss in wheel shaft centre bore is inserted when one end face of aluminium matter cushion block having the use of evagination, the external diameter of cylinder boss is suitable with wheel shaft centre bore internal diameter, the other end of aluminium matter cushion block has the cylinder shape groove received and drive hydraulic cylinder piston rod outer end, drives hydraulic cylinder piston rod outer end external diameter suitable with cylinder shape groove internal diameter.
With the 737NG series aircraft main landing gear wheel shaft axle sleeve used now with brake and overlap removal tool and compare, adopt the invention, can accelerate to disassemble speed, reduce a staff quantity, increase work efficiency, reduce the damage of parts and instrument, shorten aircraft and stop a maintenance cycle, realize safe and effective disassembling, positive adaptation modern enterprise is to requirement safely and efficiently.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is described in more detail:
Fig. 1 is the existing dismounting schematic diagram of Boeing-737 NG series aircraft main landing gear wheel shaft brake cover.
Fig. 2 is the existing dismounting schematic diagram of Boeing-737 NG series aircraft main landing gear wheel shaft axle sleeve.
Fig. 3 is Boeing-737 NG series main landing gear wheel shaft axle sleeve, brake cover and wheel shaft axle sleeve alignment pin schematic diagram.
Fig. 4 is the dismounting schematic diagram of Boeing-737 NG series aircraft main landing gear wheel shaft brake cover.
Fig. 5 is the dismounting schematic diagram of Boeing-737 NG series aircraft main landing gear wheel shaft axle sleeve alignment pin.
Fig. 6 is the A portion enlarged drawing of Fig. 5.
Fig. 7 is the action sequence diagram dismantling hydraulic cylinder in Fig. 5.
Fig. 8 is the dismounting schematic diagram of Boeing-737 NG series aircraft main landing gear wheel shaft axle sleeve.
Fig. 9 is the B portion schematic diagram of Fig. 8.
Detailed description of the invention
As shown in Fig. 3 to Fig. 9, a kind of 737NG series aircraft main landing gear 1 wheel shaft axle sleeve 11 and brake cover 10 disassembling fixture,
Comprising brake cover positioning disk 2 and pin assemblies 3 is drawn in the brake cover dismounting be installed on brake cover positioning disk, brake cover is removed and is drawn the pin that draws of pin assemblies to remove hole and coordinate with braking to overlap;
Also comprise and drive hydraulic cylinder 16, the hydraulic cylinder mount pad 15 installing driving hydraulic cylinder, aluminium matter cushion block 14 and at least two pull bars 13.Pull bar can adopt high strength steel, can bear 10 grades of pulling force.Brake is overlapped positioning disk and hydraulic cylinder mount pad is all had the through hole that for pull bar wear identical with pull bar quantity, every root pull bar all runs through a through hole on brake cover positioning disk and hydraulic cylinder mount pad, realizes braking overlap positioning disk and hydraulic cylinder mount pad is limited on pull bar by being positioned at the nut that pull bar coordinates with pull rod screw; Drive hydraulic cylinder can be connected with hydraulic hand-pump 17; Hydraulic cylinder is driven to adopt
eNERPACproduct oil cylinder RC106.
Also comprise body 22, body comprises the flange of cylindrical portion and the formation of cylindrical portion one end, body is formed by two halfbodies are involutory, namely cylindrical portion is split up into two parts by the split surface through its axis, during use, body is placed on wheel shaft, and the inner end face of body flange end contact wheel shaft axle sleeve axially outwards to extrude wheel shaft axle sleeve under axial force, brake cover positioning disk sleeve is in cylindrical portion, and brake cover positioning disk centre bore internal diameter is less than flange outside diameter; During dismounting, hydraulic cylinder mount pad is positioned at the outside of main landing gear wheel shaft outer end, drives the piston rod of hydraulic cylinder to be pressed in by aluminium matter cushion block active force is led to peraluminous cushion block by main landing gear wheel shaft outer end to pass to main landing gear wheel shaft.
Above-mentioned 737NG series aircraft main landing gear wheel shaft axle sleeve and brake cover disassembling fixture are placed in wheel shaft centre bore wheel shaft axle sleeve alignment pin 18 to be ejected the dismounting hydraulic cylinder 19 of dismounting when also comprising use.The support portion that dismounting hydraulic cylinder is supported in wheel shaft center bore inner wall has can make dismounting hydraulic cylinder and wheel shaft center bore inner wall coincide the external cylindrical surface contacted, can by installing the realization of aluminum circular arc cushion block additional in cylinder lower.Aluminium matter support is relative fixing with the cylinder body of dismounting hydraulic cylinder, aluminium matter support has the pilot hole for steel ejector pin guiding, steel ejector pin is held in pilot hole by aluminium matter support, pilot hole is positioned at dismounting hydraulic cylinder piston rod and stretches out dead ahead, direction and pilot hole bearing of trend is with dismantling hydraulic cylinder piston rod that to stretch out direction consistent, dismounting hydraulic cylinder piston rod drives the motion of steel ejector pin, and dismounting hydraulic cylinder can be connected with hydraulic hand-pump by hydraulic oil pipe 20.Dismounting hydraulic cylinder can adopt
eNERPACultra-thin oil cylinder RC50.
The both ends of pull bar all have thread segment and guiding polished rod section, guiding polished rod section is positioned at inside thread segment, nut coordinates with thread segment, brake cover positioning disk and hydraulic cylinder mount pad correspondence are positioned in two guiding polished rod sections of every root pull bar, be provided with the spacing shaft shoulder and move to stop in brake cover positioning disk and hydraulic cylinder mount pad inside guiding polished rod section.
Hydraulic cylinder mount pad is disc, hydraulic cylinder mount pad has screwed hole of centre, drive the connecting portion of hydraulic cylinder to be threaded with screwed hole of centre and realize driving the installation of hydraulic cylinder and hydraulic cylinder mount pad, through hole on screwed hole of centre and hydraulic cylinder mount pad all extends along the axial direction of hydraulic cylinder mount pad, whole through holes on hydraulic cylinder mount pad annular centered by screwed hole of centre is uniform, accordingly, the annular centered by the cover positioning disk centre bore that brakes of the whole through holes on brake cover positioning disk is uniform.
In order to protect the surface of brake cover, on the inner surface of brake cover positioning disk centre bore, annular is evenly equipped with multiple Teflon cushion block, and the quantity of Teflon cushion block can be 6.
For convenience of the installation of body, flange has the breach avoiding flange and pull bar to interfere when body and brake cover positioning disk coordinate, the quantity pull bar quantity of breach is consistent.Breach can be circular arc.
The relative two sides of brake cover positioning disk are equipped with and the installing hole drawing pin to be slidably matched, and each brake cover is removed and is drawn the pressing plate of pin assemblies to be fixed on the relative two sides of brake cover positioning disk respectively by two screws.
Draw pin one end to have and overlap the polished rod section of removing hole and being slidably matched with brake, the other end has thread segment, has the spacing shaft shoulder inside polished rod section, has the spacing shaft shoulder inside thread segment, and thread segment wears pressing plate and by nut by pressing plate and draw pin to fix.Or draw pin one end to have and overlap the polished rod section of removing hole and being slidably matched with brake, the installing hole interference fit on the other end and pressing plate, has the spacing shaft shoulder inside polished rod section.
Aluminium matter cushion block realizes driving hydraulic cylinder and wheel shaft assignment, thus ensures parallelly with during axle sleeve to exert a force with axis at decomposition brake cover.The cylinder boss in wheel shaft centre bore is inserted when one end face of aluminium matter cushion block having the use of evagination, the external diameter of cylinder boss is suitable with wheel shaft centre bore internal diameter, the other end of aluminium matter cushion block has the cylinder shape groove received and drive hydraulic cylinder piston rod outer end, drives hydraulic cylinder piston rod outer end external diameter suitable with cylinder shape groove internal diameter.
For accelerating to remove decomposition rate, increase work efficiency, reduce the security risk of decomposing defective component risk and operating personnel, reduce job costs, shorten aircraft and stop a maintenance cycle, the invention changes the intensity of removal tool, assembling mode, force way and the way of contact, apply the brakes cover positioning disk, drive hydraulic cylinder, hydraulic cylinder mount pad, aluminium matter cushion block, body and at least two pull bars, the dismounting carrying out main landing gear wheel shaft axle sleeve and brake cover is decomposed, manual pump acts on aluminium matter cushion block by driving hydraulic cylinder, then the power transmission of reaction-force hydraulic-pressure cylinder mount pad is passed through to pull bar, brake cover positioning disk, the dismounting of brake cover draws pin or wheel shaft axle sleeve to remove on body, even power transmission is on brake cover or wheel shaft axle sleeve, constantly whole brake cover or wheel shaft axle sleeve are extracted from main landing gear wheel shaft.
Its technical problem solved is as follows:
1) improve relevant piece safety when decomposition removed by main landing gear wheel shaft axle sleeve and brake cover, do not use destructive dismounting mode, utilize aircraft components body construction to match with specific purpose tool, simply effective parts to be decomposed;
2) improve the speed of disassembling, utilize the process that this patent instrument is pulling out wheel shaft axle sleeve and brake cover only to need to complete for about 30 minutes;
3) reduce a staff quantity, and whole process of disassembling only needs a staff just can finish the work;
4) reduce labour intensity, utilize the firmly lasting of instrument itself, do not need to carry out destructiveness with a large amount of manpower and remove;
5) solve the easy slippage problem of lifting surface area small tool, reduce the labor safety risk of operating personnel.
It is as follows that unloading process is overlapped in 737NG series aircraft main landing gear wheel shaft axle sleeve and brake:
The first step, decomposition pulling out brake cover, as shown in Figure 4:
Hydraulic hand-pump is utilized to produce high voltage power source, driving hydraulic cylinder piston rod is stretched out, masterpiece is used on aluminium matter cushion block, and then pass on wheel shaft, thus make hydraulic cylinder mount pad generation reaction force go to pull brake cover positioning disk to draw pin assemblies by the dismounting of brake cover positioning disk drive brake cover again by pull bar, pin is drawn to remove hole and coordinates power finally to pass to brake overlap by overlap with brake, the dismounting decomposition that completing brakes overlaps.
Second step, dismounting wheel shaft axle sleeve alignment pin, as shown in Figures 5 to 7:
Hydraulic hand-pump is utilized to produce high voltage power source, dismounting hydraulic cylinder piston rod to be stretched out masterpiece is used on steel ejector pin thus to be delivered on wheel shaft axle sleeve alignment pin, by the reaction force that dismounting hydraulic cylinder contacts with wheel shaft center bore inner wall, extrude wheel shaft axle sleeve alignment pin, complete the dismounting of wheel shaft axle sleeve alignment pin.
3rd step, decomposition pull out wheel shaft axle sleeve, as shown in Figure 8 and Figure 9:
Two body halfbodies are closed up to be stuck on wheel shaft, the inner face of its outer face contact wheel shaft axle sleeve, and its cylindrical portion is arranged in brake cover positioning disk centre bore.Hydraulic hand-pump is utilized to produce high voltage power source, driving hydraulic cylinder piston rod is stretched out to be used on aluminium matter cushion block and wheel shaft by masterpiece, thus make hydraulic cylinder mount pad generation reaction force go to pull brake cover positioning disk by brake cover positioning disk, power to be passed to body flange end again by pull bar, by body flange end transmit shearing force the most at last this shearing force be converted to outside pull transfer to wheel shaft axle sleeve, thus complete wheel shaft axle sleeve dismounting decompose.By body flange end transmit shearing force the most at last this shearing force be converted to outside pull transfer to wheel shaft axle sleeve, greatly increase force contact area, thus complete safely and effectively wheel shaft axle sleeve dismounting decompose.
Claims (10)
1. 737NG series aircraft main landing gear wheel shaft axle sleeve and a brake cover disassembling fixture, is characterized in that:
Comprising brake cover positioning disk and pin assemblies is drawn in the brake cover dismounting be installed on brake cover positioning disk, brake cover is removed and is drawn the pin that draws of pin assemblies to remove hole and coordinate with braking to overlap;
Also comprise and drive hydraulic cylinder, the hydraulic cylinder mount pad installing driving hydraulic cylinder, aluminium matter cushion block and at least two pull bars, brake is overlapped positioning disk and hydraulic cylinder mount pad is all had the through hole that for pull bar wear identical with pull bar quantity, every root pull bar all runs through a through hole on brake cover positioning disk and hydraulic cylinder mount pad, realizes braking overlap positioning disk and hydraulic cylinder mount pad is limited on pull bar by being positioned at the nut that pull bar coordinates with pull rod screw;
Also comprise body, body comprises the flange of cylindrical portion and the formation of cylindrical portion one end, body is formed by two halfbodies are involutory, during use, body is placed on wheel shaft, the inner end face of body flange end contact wheel shaft axle sleeve outwards to extrude wheel shaft axle sleeve under axial force, and brake cover positioning disk sleeve is in cylindrical portion, and brake cover positioning disk centre bore internal diameter is less than flange outside diameter; During dismounting, hydraulic cylinder mount pad is positioned at the outside of main landing gear wheel shaft outer end, drives the piston rod of hydraulic cylinder to be pressed in by aluminium matter cushion block active force is led to peraluminous cushion block by main landing gear wheel shaft outer end to pass to main landing gear wheel shaft.
2. 737NG series aircraft main landing gear wheel shaft axle sleeve according to claim 1 and brake cover disassembling fixture, is characterized in that:
Wheel shaft centre bore is placed in wheel shaft axle sleeve alignment pin to be ejected the dismounting hydraulic cylinder of dismounting when also comprising use, the support portion that dismounting hydraulic cylinder is supported in wheel shaft center bore inner wall has can make dismounting hydraulic cylinder and wheel shaft center bore inner wall coincide the external cylindrical surface contacted, aluminium matter support is relative fixing with the cylinder body of dismounting hydraulic cylinder, aluminium matter support has the pilot hole for steel ejector pin guiding, steel ejector pin is held in pilot hole by aluminium matter support, pilot hole is positioned at dismounting hydraulic cylinder piston rod and stretches out dead ahead, direction and pilot hole bearing of trend is with dismantling hydraulic cylinder piston rod that to stretch out direction consistent, dismounting hydraulic cylinder piston rod drives the motion of steel ejector pin.
3. 737NG series aircraft main landing gear wheel shaft axle sleeve according to claim 1 and brake cover disassembling fixture, it is characterized in that: the both ends of pull bar all have thread segment and guiding polished rod section, guiding polished rod section is positioned at inside thread segment, nut coordinates with thread segment, brake cover positioning disk and hydraulic cylinder mount pad correspondence are positioned in two guiding polished rod sections of every root pull bar, be provided with the spacing shaft shoulder and move to stop in brake cover positioning disk and hydraulic cylinder mount pad inside guiding polished rod section.
4. 737NG series aircraft main landing gear wheel shaft axle sleeve according to claim 1 and brake cover disassembling fixture, it is characterized in that: hydraulic cylinder mount pad is disc, hydraulic cylinder mount pad has screwed hole of centre, drive the connecting portion of hydraulic cylinder to be threaded with screwed hole of centre and realize driving the installation of hydraulic cylinder and hydraulic cylinder mount pad, through hole on screwed hole of centre and hydraulic cylinder mount pad all extends along the axial direction of hydraulic cylinder mount pad, whole through holes on hydraulic cylinder mount pad annular centered by screwed hole of centre is uniform, accordingly, whole through holes on brake cover positioning disk annular centered by the cover positioning disk centre bore that brakes is uniform.
5. 737NG series aircraft main landing gear wheel shaft axle sleeve according to claim 1 and brake cover disassembling fixture, is characterized in that: on the inner surface of brake cover positioning disk centre bore, annular is evenly equipped with multiple Teflon cushion block.
6. 737NG series aircraft main landing gear wheel shaft axle sleeve according to claim 1 and brake cover disassembling fixture, it is characterized in that: flange has the breach avoiding flange and pull bar to interfere when body and brake cover positioning disk coordinate, the quantity pull bar quantity of breach is consistent.
7. 737NG series aircraft main landing gear wheel shaft axle sleeve according to claim 1 and brake cover disassembling fixture, it is characterized in that: the relative two sides of brake cover positioning disk are equipped with and the installing hole drawing pin to be slidably matched, each brake cover is removed and is drawn the pressing plate of pin assemblies to be fixed on the relative two sides of brake cover positioning disk respectively by two screws.
8. 737NG series aircraft main landing gear wheel shaft axle sleeve according to claim 7 and brake cover disassembling fixture, it is characterized in that: draw pin one end to have and overlap the polished rod section of removing hole and being slidably matched with brake, the other end has thread segment, inside polished rod section, there is the spacing shaft shoulder, there is inside thread segment the spacing shaft shoulder, thread segment wear pressing plate and by nut by pressing plate with draw pin to fix.
9. 737NG series aircraft main landing gear wheel shaft axle sleeve according to claim 7 and brake cover disassembling fixture, it is characterized in that: draw pin one end to have and overlap the polished rod section of removing hole and being slidably matched with brake, installing hole interference fit on the other end and pressing plate, has the spacing shaft shoulder inside polished rod section.
10. 737NG series aircraft main landing gear wheel shaft axle sleeve according to claim 1 and brake cover disassembling fixture, it is characterized in that: aluminium matter cushion block realizes driving hydraulic cylinder and wheel shaft assignment, the cylinder boss in wheel shaft centre bore is inserted when one end face of aluminium matter cushion block having the use of evagination, the external diameter of cylinder boss is suitable with wheel shaft centre bore internal diameter, the other end of aluminium matter cushion block has the cylinder shape groove received and drive hydraulic cylinder piston rod outer end, drives hydraulic cylinder piston rod outer end external diameter suitable with cylinder shape groove internal diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510183968.7A CN104858638B (en) | 2015-04-20 | 2015-04-20 | 737NG series aircraft main landing gear wheel shaft axle sleeve and brake set disassembling fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510183968.7A CN104858638B (en) | 2015-04-20 | 2015-04-20 | 737NG series aircraft main landing gear wheel shaft axle sleeve and brake set disassembling fixture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104858638A true CN104858638A (en) | 2015-08-26 |
| CN104858638B CN104858638B (en) | 2017-03-01 |
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| CN201510183968.7A Active CN104858638B (en) | 2015-04-20 | 2015-04-20 | 737NG series aircraft main landing gear wheel shaft axle sleeve and brake set disassembling fixture |
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| CN204545860U (en) * | 2015-04-20 | 2015-08-12 | 山东太古飞机工程有限公司 | 737NG series aircraft main landing gear wheel shaft axle sleeve and brake cover disassembling fixture |
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| CN104858638B (en) | 2017-03-01 |
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