CN104858638B - 737NG series aircraft main landing gear wheel shaft axle sleeve and brake set disassembling fixture - Google Patents
737NG series aircraft main landing gear wheel shaft axle sleeve and brake set disassembling fixture Download PDFInfo
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- CN104858638B CN104858638B CN201510183968.7A CN201510183968A CN104858638B CN 104858638 B CN104858638 B CN 104858638B CN 201510183968 A CN201510183968 A CN 201510183968A CN 104858638 B CN104858638 B CN 104858638B
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- wheel shaft
- hydraulic cylinder
- brake set
- axle sleeve
- landing gear
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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
-
- 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
-
- 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
Abstract
The invention provides a kind of 737NG series aircraft main landing gear wheel shaft axle sleeve and brake set disassembling fixture, draw pin assemblies including brake set positioning disk and brake set dismounting, draw pin to remove hole cooperation with brake set；Also include driving hydraulic cylinder, hydraulic cylinder mounting seat, aluminum cushion block and at least two pull bars, it is respectively provided with through hole on brake set positioning disk and hydraulic cylinder mounting seat, every pull bar all runs through two through holes, realizes brake set positioning disk by nut and hydraulic cylinder mounting seat is limited on pull bar；Also include body, body includes cylindrical portion and flange, body is made up of two halfbody pairings, during use, body is placed on wheel shaft, body flange end contact wheel shaft axle sleeve the inner end face, in cylindrical portion, brake set positioning center hole internal diameter is less than flange outside diameter to brake set positioning disk sleeve；During dismounting, hydraulic cylinder mounting seat is located at the outside of main landing gear wheel shaft outer end, and piston rod aluminum cushion block is pressed on main landing gear wheel shaft outer end by aluminum cushion block, active force is passed to main landing gear wheel shaft.
Description
Technical field
The invention be related to 737NG series aircraft main landing gear wheel shaft axle sleeve, brake set remove decompose and in particular to
737NG series aircraft main landing gear wheel shaft axle sleeve and brake set disassembling fixture.
Background technology
737NG series aircraft main landing gear wheel shaft axle sleeve and the set that brakes are removed when decomposing, and handss keep in repair in related Boeing
Specific purpose tool is given in volume（As depicted in figs. 1 and 2）.But through aircraft during long-term operation, main landing gear 1 wheel shaft
Axle sleeve and brake set 10 due to repeatedly at a high speed brake acting and thermally stressed multiple effect so as to tight with the cooperation of wheel shaft
Close, therefore remove when decomposing, if with the specific purpose tool being given in handbook, its pull bar and supporting latch intensity typically up to less than
Actual requirement, thus cause instrument to be drawn bad situation to happen occasionally.As shown in Figure 2, when removing wheel shaft axle sleeve, it is logical simultaneously
Crossing the dismounting of the wheel shaft axle sleeve on specific purpose tool draws pin to contact what power transmission to complete with the fabrication hole of wheel shaft axle sleeve, due to wheel shaft axle sleeve
Removing draws pin diameter and the technique bore dia of wheel shaft axle sleeve to differ greatly, and they are actual to contact as a contact power transmission, contact area
Little, stress is big, often results in the damage of instrument and part under big pulling force.
737NG series aircraft remove decompose main landing gear wheel shaft axle sleeve and brake set it is common practice to：First with handss
The specific purpose tool providing in volume covers to remove to brake, and general brake set is little with the tight fit contact area of wheel shaft, and the set that brakes
On fabrication hole internal diameter and be installed in brake set positioning disk 2 on brake set remove draw the external diameter of pin assemblies 3 to match, contact surface
Long-pending comparatively larger, with the use of hydraulic hand-pump 7 and hydraulic jack 6, the specific purpose tool that substantially can be recommended with service manual
Complete to disassemble, minority cannot be removed, it is possible to use the method for outside expansion of heating completes the dismounting of set of braking, simply pull bar 5
On connecting bolt 4 and its installing hole easily damaged.But when tearing wheel shaft axle sleeve open, if be given in service manual is special
Instrument, it is using arbitrarily symmetrical two in six on wheel shaft axle sleeve big fabrication holes, by being installed in wheel shaft axle sleeve positioning
Wheel shaft axle sleeve on disk 9 is removed and is drawn pin assemblies 8 and big fabrication hole contact internal walls stress, the back action being produced by hydraulic jack
Power thus pull wheel shaft axle sleeve from wheel shaft pull-up.But removing because of wheel shaft axle sleeve draws diameter between pin and fabrication hole to differ too
Greatly, contact surface is too little, and wheel shaft and the cooperation of wheel shaft axle sleeve are tight in addition, therefore easily occurs damage fabrication hole also cannot remove wheel shaft axle
The phenomenon of set.Common practice be damage a pair of fabrication hole after change a pair of trial again and disassemble, when three pairs of fabrication holes all damage also no
When method is removed, just wheel shaft axle sleeve can only be cut and do destructive dismounting, and will also result in wheel shaft while fabrication hole damages
The damage drawing pin removed by axle sleeve, is easy to the risk occurring to damage wheel shaft during destroying dismounting.Generally tear open in destructiveness
Except when, needed for 3 people's more than two days used times of cooperation, it will have a strong impact on inspections, order cycle time, thus affect aircraft maintenance appear on the scene all
Phase.
Therefore, tradition removes decomposition method following shortcoming：
1）Pull out difficulty, efficiency is low, easily generation part damages and injury, impact aircraft goes out the field duration, runs into
The resolving time is destroyed more than 2 days when difficult；
2）Forced contact face is little, is also easy to produce derivative risk and causes personnel to injure under the big pressure of 100000PSI；
3）Destroy and there is, during removing wheel shaft axle sleeve, the risk damaging wheel shaft, once damaging wheel shaft it may be necessary to order
Goods is changed, but it is difficult to order goods, and easily causes aircraft Inspection cycle to be delayed.
Content of the invention
The invention provides a kind of 737NG series aircraft main landing gear wheel shaft axle sleeve and brake set disassembling fixture, reduce people
Member's labor intensity, reduction aircraft damage risk, reduction tool damage risk, make dismounting work safety convenient.
In order to solve above-mentioned technical problem, the technical scheme is that：
A kind of 737NG series aircraft main landing gear wheel shaft axle sleeve and brake set disassembling fixture,
Draw pin assemblies including brake set positioning disk with the brake set dismounting being installed on brake set positioning disk, brake covers removes
The pin that draws drawing pin assemblies removes hole cooperation with brake set；
Also include driving hydraulic cylinder, the hydraulic cylinder mounting seat installing driving hydraulic cylinder, aluminum cushion block and at least two pull bars,
It is respectively provided with, on brake set positioning disk and hydraulic cylinder mounting seat, the through hole wearing with pull bar quantity identical for pull bar, every pull bar is equal
Run through a through hole in brake set positioning disk and hydraulic cylinder mounting seat, by the nut with pull rod screw cooperation on pull bar
Realize brake set positioning disk and hydraulic cylinder mounting seat is limited on pull bar；
Also include body, body includes the flange that cylindrical portion and cylindrical portion one end are formed, and body is by two halfbody pairing structures
Become, during use, body is placed on wheel shaft, body flange end contact wheel shaft axle sleeve the inner end face is outwards to squeeze under axial force
Wheel pressing shaft axle sleeve, in cylindrical portion, brake set positioning center hole internal diameter is less than flange outside diameter to brake set positioning disk sleeve；Dismounting
When, hydraulic cylinder mounting seat is located at the outside of main landing gear wheel shaft outer end, and aluminum cushion block is pressed in master by the piston rod of driving hydraulic cylinder
On undercarriage axle outer end, active force is passed to main landing gear wheel shaft by aluminum cushion block.
Above-mentioned 737NG series aircraft main landing gear wheel shaft axle sleeve and brake set disassembling fixture,
Also include using when be placed in wheel shaft centre bore by wheel shaft axle sleeve alignment pin ejection dismounting dismounting hydraulic cylinder, tear open
Unload and the supporting part of wheel shaft center bore inner wall is supported on hydraulic cylinder has dismounting hydraulic cylinder and wheel shaft center bore inner wall can be made to kiss
The external cylindrical surface that splice grafting touches, aluminum support is relatively fixed with the cylinder body of dismounting hydraulic cylinder, aluminum support has for steel ejector pin
The pilot hole of guiding, steel ejector pin is held in pilot hole aluminum support, and pilot hole is located at dismounting hydraulic cylinder piston rod and stretches out
It is consistent that direction dead ahead and pilot hole bearing of trend and dismounting hydraulic cylinder piston rod stretch out direction, dismounting hydraulic cylinder piston rod driving
Steel ejector pin moves.
Above-mentioned 737NG series aircraft main landing gear wheel shaft axle sleeve and brake set disassembling fixture, the both ends of pull bar are respectively provided with
Thread segment and guiding light bar segment, guide light bar segment and are located inside thread segment, nut is coordinated with thread segment, and brake covers positioning disk and liquid
Cylinder pressure mounting seat is corresponding to be guided in light bar segments positioned at the two of every pull bar, is provided with the spacing shaft shoulder and is stopped with stopping inside guiding light bar segment
Move in car set positioning disk and hydraulic cylinder mounting seat.
Above-mentioned 737NG series aircraft main landing gear wheel shaft axle sleeve and brake set disassembling fixture, hydraulic cylinder mounting seat is disk
Body, hydraulic cylinder mounting seat has screwed hole of centre, the connecting portion of driving hydraulic cylinder threaded with screwed hole of centre realization drive
Hydraulic cylinder and the installation of hydraulic cylinder mounting seat, the through hole on screwed hole of centre and hydraulic cylinder mounting seat is all along hydraulic cylinder mounting seat
Axial direction extends, and the annular centered on screwed hole of centre of the whole through holes in hydraulic cylinder mounting seat is uniform, accordingly, brake set
Whole through holes on positioning disk annular centered on set positioning center hole of braking is uniform.
Above-mentioned 737NG series aircraft main landing gear wheel shaft axle sleeve and brake set disassembling fixture, brake set positioning center hole
Inner surface on annular be evenly equipped with multiple Teflon cushion blocks.
Above-mentioned 737NG series aircraft main landing gear wheel shaft axle sleeve and brake set disassembling fixture, flange has when body and
The breach that flange is interfered is avoided with pull bar, the quantity pull bar quantity of breach is consistent during brake set positioning disk cooperation.
Above-mentioned 737NG series aircraft main landing gear wheel shaft axle sleeve and brake set disassembling fixture, brake covers the relative of positioning disk
The installing hole being equipped with two sides and drawing pin to be slidably matched, each brake set is removed and draws the pressing plate of pin assemblies to pass through two respectively
Screw is fixed on the opposite sides face of brake set positioning disk.
Above-mentioned 737NG series aircraft main landing gear wheel shaft axle sleeve and brake set disassembling fixture, draw pin one end to have and brake
The light bar segment that hole is slidably matched removed by set, and the other end has thread segment, has the spacing shaft shoulder inside light bar segment, has inside thread segment
The limited location shaft shoulder, thread segment is worn pressing plate and is fixed pressing plate with drawing pin by nut.
Above-mentioned 737NG series aircraft main landing gear wheel shaft axle sleeve and brake set disassembling fixture, draw pin one end to have and brake
Set removes the light bar segment that hole is slidably matched, the installing hole interference fit on the other end and pressing plate, has limit shaft inside light bar segment
Shoulder.
Above-mentioned 737NG series aircraft main landing gear wheel shaft axle sleeve and brake set disassembling fixture, aluminum cushion block is realized driving liquid
Cylinder pressure and wheel shaft assignment, insert the cylinder boss of wheel shaft center in the hole during the use that the end face of aluminum cushion block has evagination,
The external diameter of cylinder boss is suitable with wheel shaft centre bore internal diameter, and the other end of aluminum cushion block has receiving driving hydraulic cylinder piston rod
The cylinder shape groove of outer end, driving hydraulic cylinder piston rod outer end external diameter is suitable with cylinder shape groove internal diameter.
Compare with the 737NG series aircraft main landing gear wheel shaft axle sleeve being currently in use now and brake set removal tool, adopt
With the invention, can accelerate to disassemble speed, reduce crew numbers, improve work efficiency, reduce part and instrument
Damage, shorten aircraft and stop a maintenance cycle, realize safely and effectively disassembling, positive adaptation modern enterprise is to safely and efficiently will
Ask.
Brief description
The further details of explanation to this utility model below in conjunction with the accompanying drawings：
Fig. 1 is the existing dismounting schematic diagram of Boeing-737 NG series aircraft main landing gear wheel shaft brake set.
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 set 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 set.
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.
Specific embodiment
In conjunction with 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 fixtures,
Draw pin assemblies 3 including brake set positioning disk 2 with the brake set dismounting being installed on brake set positioning disk, brake set is torn open
Except the pin that draws drawing pin assemblies removes hole cooperation with brake set；
Also include driving hydraulic cylinder 16, the hydraulic cylinder mounting seat 15 installing driving hydraulic cylinder, aluminum cushion block 14 and at least two
Root pull bar 13.Pull bar can adopt high strength steel, can bear 10 grades of pulling force.It is respectively provided with brake set positioning disk and hydraulic cylinder mounting seat
The through hole wearing for pull bar with pull bar quantity identical, every pull bar all runs through in brake set positioning disk and hydraulic cylinder mounting seat
One through hole, by realizing with the nut of pull rod screw cooperation on pull bar, brake covers positioning disk and hydraulic cylinder mounting seat is spacing
On pull bar；Driving hydraulic cylinder can be connected with hydraulic hand-pump 17；Driving hydraulic cylinder can adopt ENERPAC product oil cylinder
RC106.
Also include body 22, body includes the flange that cylindrical portion and cylindrical portion one end are formed, and body is by two halfbody pairings
Constitute, that is, cylindrical portion is split up into two parts by the split surface through its axis, and during use, body is placed on wheel shaft, body flange
Axially outwardly against wheel shaft axle sleeve, brake set positioning disk sleeve is in circle with axial force for end in contact wheel shaft axle sleeve the inner end face
In cylinder portion, brake set positioning center hole internal diameter is less than flange outside diameter；During dismounting, hydraulic cylinder mounting seat is located at main landing gear wheel shaft
The outside of outer end, the piston rod of driving hydraulic cylinder aluminum cushion block is pressed on main landing gear wheel shaft outer end active force is passed through aluminum
Cushion block passes to main landing gear wheel shaft.
Above-mentioned 737NG series aircraft main landing gear wheel shaft axle sleeve and brake set disassembling fixture also include being placed in wheel shaft when using
Wheel shaft axle sleeve alignment pin 18 to be ejected the dismounting hydraulic cylinder 19 of dismounting in centre bore.It is supported in wheel shaft center on dismounting hydraulic cylinder
The supporting part of in the hole wall has can make dismounting hydraulic cylinder and wheel shaft center bore inner wall coincide the external cylindrical surface contacting, and can pass through
Install aluminum circular arc cushion block additional in cylinder lower to realize.Aluminum support is relatively fixed with the cylinder body of dismounting hydraulic cylinder, aluminum support
On there is pilot hole for steel ejector pin guiding, steel ejector pin is held in pilot hole aluminum support, and pilot hole is located at dismounting
Hydraulic cylinder piston rod stretch out direction dead ahead and pilot hole bearing of trend and dismounting hydraulic cylinder piston rod to stretch out direction consistent, dismantle
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.Tear open
Unload hydraulic cylinder and can adopt ENERPAC ultra-thin oil cylinder RC50.
The both ends of pull bar be respectively provided with thread segment and guiding light bar segment, guiding light bar segment be located at thread segment inside, nut with
Thread segment coordinates, and brake set positioning disk is corresponding with hydraulic cylinder mounting seat to be guided in light bar segments positioned at the two of every pull bar, guides light
It is provided with the spacing shaft shoulder inside bar segment to move to stop in brake set positioning disk and hydraulic cylinder mounting seat.
Hydraulic cylinder mounting seat is disc, and hydraulic cylinder mounting seat has a screwed hole of centre, the connecting portion of driving hydraulic cylinder with
The threaded installation realizing driving hydraulic cylinder and hydraulic cylinder mounting seat of screwed hole of centre, screwed hole of centre and hydraulic cylinder mounting seat
On through hole all extend along the axial direction of hydraulic cylinder mounting seat, the whole through holes in hydraulic cylinder mounting seat with screwed hole of centre are
Center annular is uniform, and accordingly, the whole through holes covering on positioning disk annular centered on set positioning center hole of braking of braking is equal
Cloth.
In order to protect the surface of brake set, on the inner surface of brake set positioning center hole, annular is evenly equipped with multiple Teflons
Cushion block, the quantity of Teflon cushion block can be 6.
For convenience of the installation of body, flange has and avoids flange to do with pull bar when body and brake set positioning disk cooperation
The breach relating to, the quantity pull bar quantity of breach is consistent.Breach can be circular arc.
It is equipped with and the installing hole drawing pin to be slidably matched on the opposite sides face of brake set positioning disk, each brake set is removed
The pressing plate drawing pin assemblies is fixed on by two screws on the opposite sides face of brake set positioning disk respectively.
Draw pin one end to have and remove, with brake set, the light bar segment that hole is slidably matched, the other end has thread segment, in light bar segment
Side has the spacing shaft shoulder, has the spacing shaft shoulder inside thread segment, and thread segment is worn pressing plate and consolidated pressing plate with drawing pin by nut
Fixed.Or, draw pin one end to have and remove the light bar segment that hole is slidably matched, the installing hole interference on the other end and pressing plate with brake set
Cooperation, has the spacing shaft shoulder inside light bar segment.
Aluminum cushion block realize driving hydraulic cylinder with wheel shaft assignment, thus ensure decompose brake set with axle sleeve when parallel and
Axis exerts a force.The cylinder boss of wheel shaft center in the hole is inserted, cylinder is convex during the use that evagination is had on the end face of aluminum cushion block
The external diameter of platform is suitable with wheel shaft centre bore internal diameter, and the other end of aluminum cushion block has receives driving hydraulic cylinder piston rod outer end
Cylinder shape groove, driving hydraulic cylinder piston rod outer end external diameter is suitable with cylinder shape groove internal diameter.
For accelerating to remove decomposition rate, improve work efficiency, reduce the peace decomposing defective component risk and operator
Full blast danger, reduces job costs, shortens aircraft and stops a maintenance cycle, the invention changes the intensity of removal tool, assembling side
Formula, force way and the way of contact, using brake set positioning disk, driving hydraulic cylinder, hydraulic cylinder mounting seat, aluminum cushion block, body
At least two pull bars, carry out main landing gear wheel shaft axle sleeve and the dismounting of brake set is decomposed, and manual pump is made by driving hydraulic cylinder
Used in aluminum cushion block, then drawn by reaction-force hydraulic-pressure cylinder mounting seat power transmission to pull bar, brake set positioning disk, brake set dismounting
Pin or wheel shaft axle sleeve are removed on body, and in uniform power transmission to brake set or wheel shaft axle sleeve, constantly will entirely brake set or wheel shaft
Axle sleeve is extracted from main landing gear wheel shaft.
The technical problem that it solves is as follows：
1）Improve main landing gear wheel shaft axle sleeve and associated components safety when decomposing removed by brake set, do not use destructiveness to tear open
Except mode, matched with specific purpose tool using aircraft components body construction, simply effectively part is decomposed；
2）Improve and disassemble speed, only need about 30 points using this patent instrument in the process pulling out wheel shaft axle sleeve and brake set
Clock can complete；
3）Reduce crew numbers, process of entirely disassembling only needs to a staff and just can complete work；
4）Reduce labor intensity, using instrument itself continue exert oneself, be not required to be carried out destructive dismounting with a large amount of manpowers；
5）Solve lifting surface area small tool and easily slip problem, reduce the labor safety risk of operator.
737NG series aircraft main landing gear wheel shaft axle sleeve and brake set unloading process are as follows：
The first step, decomposition pulling out brake set, as shown in Figure 4：
Produce high voltage power source using hydraulic hand-pump, so that driving hydraulic cylinder piston rod is stretched out, power is acted on aluminum pad
On block, and then pass on wheel shaft, so that hydraulic cylinder mounting seat produces counteracting force and goes to pull brake set positioning by pull bar
Disk drives brake set dismounting to draw pin assemblies by brake set positioning disk again, draws pin by removing hole cooperation with brake set, power finally to be passed
Pass brake set, complete the dismounting decomposition of set of braking.
Second step, dismounting wheel shaft axle sleeve alignment pin, as shown in Figures 5 to 7：
Produce high voltage power source using hydraulic hand-pump, so that dismounting hydraulic cylinder piston rod is stretched out and power is acted on steel ejector pin
The upper counteracting force thus being delivered on wheel shaft axle sleeve alignment pin, being contacted with wheel shaft center bore inner wall by dismounting hydraulic cylinder, is extruded
Wheel shaft axle sleeve alignment pin, completes 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 and is stuck on wheel shaft, its outer face contacts the inner face of wheel shaft axle sleeve, its cylindrical portion is pacified
It is contained in brake set positioning center hole.Produce high voltage power source using hydraulic hand-pump, so that driving hydraulic cylinder piston rod is stretched out
Power is acted on aluminum cushion block and wheel shaft, so that hydraulic cylinder mounting seat produces counteracting force and goes to pull brake set by pull bar
Positioning disk transmits the force to body flange end by brake set positioning disk again, transmits shearing force by body flange end and the most at last should
Shearing force is converted to outside pulling force and passes to wheel shaft axle sleeve, thus the dismounting completing wheel shaft axle sleeve is decomposed.By body flange
End come to transmit shearing force the most at last this shearing force be converted to outside pulling force and pass to wheel shaft axle sleeve, greatly increase force contact surface
Long-pending, thus the dismounting safely and effectively completing wheel shaft axle sleeve is decomposed.
Claims (9)
1. a kind of 737NG series aircraft main landing gear wheel shaft axle sleeve and brake set disassembling fixture it is characterised in that：
Draw pin assemblies including brake set positioning disk with the brake set dismounting being installed on brake set positioning disk, brake covers dismounting and draws pin
The pin that draws of assembly removes hole cooperation with brake set；
Also include driving hydraulic cylinder, the hydraulic cylinder mounting seat installing driving hydraulic cylinder, aluminum cushion block and at least two pull bars, brake
It is respectively provided with, on set positioning disk and hydraulic cylinder mounting seat, the through hole wearing with pull bar quantity identical for pull bar, every pull bar all runs through
A through hole on brake set positioning disk and hydraulic cylinder mounting seat, by realizing with the nut of pull rod screw cooperation on pull bar
Brake set positioning disk and hydraulic cylinder mounting seat are limited on pull bar；
Also include body, body includes the flange that cylindrical portion and cylindrical portion one end are formed, body is made up of two halfbody pairings, makes
Used time, body is placed on wheel shaft, body flange end contact wheel shaft axle sleeve the inner end face with axial force outwardly against wheel
Axle axle sleeve, in cylindrical portion, brake set positioning center hole internal diameter is less than flange outside diameter to brake set positioning disk sleeve；During dismounting, liquid
Cylinder pressure mounting seat is located at the outside of main landing gear wheel shaft outer end, and aluminum cushion block is pressed in main landing gear by the piston rod of driving hydraulic cylinder
On axle outer end, active force is passed to main landing gear wheel shaft by aluminum cushion block；
Also include using when be placed in wheel shaft centre bore by wheel shaft axle sleeve alignment pin ejection dismounting dismounting hydraulic cylinder, dismantle liquid
The supporting part being supported in wheel shaft center bore inner wall on cylinder pressure has and dismounting hydraulic cylinder and wheel shaft center bore inner wall can be made to coincide connect
Tactile external cylindrical surface, aluminum support is relatively fixed with the cylinder body of dismounting hydraulic cylinder, aluminum support has for steel ejector pin guiding
Pilot hole, steel ejector pin is held in pilot hole aluminum support, and pilot hole is located at dismounting hydraulic cylinder piston rod and stretches out direction
It is consistent that dead ahead and pilot hole bearing of trend and dismounting hydraulic cylinder piston rod stretch out direction, dismounting hydraulic cylinder piston rod driving steel
Ejector pin moves.
2. 737NG series aircraft main landing gear wheel shaft axle sleeve according to claim 1 and brake set disassembling fixture, its feature
It is：The both ends of pull bar are respectively provided with thread segment and guiding light bar segment, and guiding light bar segment is located inside thread segment, nut and screw thread
Duan Peihe, brake set positioning disk is corresponding with hydraulic cylinder mounting seat to be guided in light bar segments positioned at the two of every pull bar, guides light bar segment
Inner side is provided with the spacing shaft shoulder and is moved with stopping in brake set positioning disk and hydraulic cylinder mounting seat.
3. 737NG series aircraft main landing gear wheel shaft axle sleeve according to claim 1 and brake set disassembling fixture, its feature
It is：Hydraulic cylinder mounting seat is disc, and hydraulic cylinder mounting seat has screwed hole of centre, the connecting portion of driving hydraulic cylinder and center
In the threaded installation realizing driving hydraulic cylinder and hydraulic cylinder mounting seat of screwed hole, screwed hole of centre and hydraulic cylinder mounting seat
Through hole all extends along the axial direction of hydraulic cylinder mounting seat, and the whole through holes in hydraulic cylinder mounting seat are centered on screwed hole of centre
Annular is uniform, and accordingly, centered on the whole through holes on brake set positioning disk cover positioning center hole to brake, annular is uniform.
4. 737NG series aircraft main landing gear wheel shaft axle sleeve according to claim 1 and brake set disassembling fixture, its feature
It is：On the inner surface of brake set positioning center hole, annular is evenly equipped with multiple Teflon cushion blocks.
5. 737NG series aircraft main landing gear wheel shaft axle sleeve according to claim 1 and brake set disassembling fixture, its feature
It is：The breach avoiding flange to be interfered with pull bar when body and brake set positioning disk cooperation, the quantity of breach are had on flange
Pull bar quantity is consistent.
6. 737NG series aircraft main landing gear wheel shaft axle sleeve according to claim 1 and brake set disassembling fixture, its feature
It is：It is equipped with and the installing hole drawing pin to be slidably matched on the opposite sides face of brake set positioning disk, each brake set dismounting is drawn
The pressing plate of pin assemblies is fixed on by two screws on the opposite sides face of brake set positioning disk respectively.
7. 737NG series aircraft main landing gear wheel shaft axle sleeve according to claim 6 and brake set disassembling fixture, its feature
It is：Draw pin one end to have and remove, with brake set, the light bar segment that hole is slidably matched, the other end has thread segment, has inside light bar segment
The limited location shaft shoulder, has the spacing shaft shoulder inside thread segment, thread segment is worn pressing plate and fixed pressing plate with drawing pin by nut.
8. 737NG series aircraft main landing gear wheel shaft axle sleeve according to claim 6 and brake set disassembling fixture, its feature
It is：Draw pin one end to have and remove, with brake set, the light bar segment that hole is slidably matched, the other end is joined with the installing hole interference on pressing plate
Close, there is inside light bar segment the spacing shaft shoulder.
9. 737NG series aircraft main landing gear wheel shaft axle sleeve according to claim 1 and brake set disassembling fixture, its feature
It is：Aluminum cushion block realizes driving hydraulic cylinder and wheel shaft assignment, inserts during the use that the end face of aluminum cushion block has evagination
The cylinder boss of wheel shaft center in the hole, the external diameter of cylinder boss is suitable with wheel shaft centre bore internal diameter, the other end of aluminum cushion block
There is cylinder shape groove, driving hydraulic cylinder piston rod outer end external diameter and the cylinder shape groove receiving driving hydraulic cylinder piston rod outer end
Internal diameter is suitable.
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 CN104858638A (en) | 2015-08-26 |
| CN104858638B true CN104858638B (en) | 2017-03-01 |
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ID=53905034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| 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 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104858638B (en) |
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| CN203610943U (en) * | 2013-11-25 | 2014-05-28 | 河北钢铁股份有限公司邯郸分公司 | Tool capable of fast disassembling work roller jaw of straightening machine |
| CN203945096U (en) * | 2014-05-15 | 2014-11-19 | 广东拓奇电力技术发展有限公司 | Self-aligning split fluid pressure type bearing thruster |
| CN104368955A (en) * | 2014-10-01 | 2015-02-25 | 鄂尔多斯职业学院 | Multifunctional bidirectional hydraulic bearing puller |
| 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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| JP3661727B2 (en) * | 1997-07-10 | 2005-06-22 | 株式会社ダイフク | Pin removal device |
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| CN2277326Y (en) * | 1995-12-11 | 1998-04-01 | 周雪松 | Hydraulic hand automatic resetting, safety pressure relief rail chain integral disassembly-and-assembly machine |
| CN201906968U (en) * | 2010-12-02 | 2011-07-27 | 二重集团（德阳）重型装备股份有限公司 | Separating device for interference assembled shaft sleeve |
| CN202780427U (en) * | 2012-08-28 | 2013-03-13 | 浙江金刚汽车有限公司 | Flywheel detaching device |
| CN203141063U (en) * | 2013-03-20 | 2013-08-21 | 武汉钢铁(集团)公司 | Thermal expansion dismounting device for coiling block shaft installed in sleeved mode |
| CN203141064U (en) * | 2013-03-20 | 2013-08-21 | 武汉钢铁(集团)公司 | Hydraulic dismounting device for coiling block sleeving shaft |
| CN203610943U (en) * | 2013-11-25 | 2014-05-28 | 河北钢铁股份有限公司邯郸分公司 | Tool capable of fast disassembling work roller jaw of straightening machine |
| CN203945096U (en) * | 2014-05-15 | 2014-11-19 | 广东拓奇电力技术发展有限公司 | Self-aligning split fluid pressure type bearing thruster |
| CN104368955A (en) * | 2014-10-01 | 2015-02-25 | 鄂尔多斯职业学院 | Multifunctional bidirectional hydraulic bearing puller |
| 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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| Publication number | Publication date |
|---|---|
| CN104858638A (en) | 2015-08-26 |
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