CN104061261B - A kind of automatic gap adjusting debooster - Google Patents
A kind of automatic gap adjusting debooster Download PDFInfo
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- CN104061261B CN104061261B CN201410229009.XA CN201410229009A CN104061261B CN 104061261 B CN104061261 B CN 104061261B CN 201410229009 A CN201410229009 A CN 201410229009A CN 104061261 B CN104061261 B CN 104061261B
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- pull bar
- sleeve
- spring
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- blind nut
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Abstract
A kind of automatic gap adjusting debooster, three identical turns are sleeved on successively on pull bar and are combined into spring housing.Spring housing is positioned at one end at the bottom of sleeve internal barrel；Packing ring is had between inner face at the bottom of the end face and sleeve cylinder of spring housing.Support set is contained in sleeve, and makes an end face of this support set coordinate with another end face of described spring housing.Described packing ring, spring housing and support set are all sleeved on pull bar.Plug screw is positioned at described sleeve to be had rib one end and is sleeved on described pull bar.Compression spring is sleeved on sleeve, and makes one end of this compression spring push against with the inner surface of blind nut, and the other end of this compression spring pushes against with sleeve rib inner surface.Blind nut is sleeved on pull bar, and makes the outer face of described blind nut and the inner face laminating of pull bar one end.The present invention, by 3 spring housings are used pre-add clamping method, eliminates the gap existed between each spring housing end face, improves the frictional force of 26%～35%.
Description
Technical field
The present invention relates to aircraft brake wheel field, specifically one and can improve friction between cluster spring set and pull bar
The automatic gap adjusting debooster of power.
Background technology
For adapting to the requirement of high performance index of present generation aircraft, modern Aviation brake machine wheel all have employed that " automatic gap adjusting returns
Force mechanisms ".Its function is: after aircraft repeatedly brakes, and brake friction material weares and teares, and makes between piston and compression plate
Distance increase.For ensureing braking quality, improve brake sensitivity, this mechanism can automatically adjust piston and brake disc it
Between gap comply with regulation requirement.
The operation principle of automatic clearance adjustment mechanism is, after repeatedly braking, and brake friction material abrasion " Δ " value, piston
Impulse stroke will increase " Δ " value, but after piston moves " Δ " value, by the blind nut installed on piston equally to
Front movement " Δ " value, blind nut encountered sleeve, and piston, under brake pressure effect, continue to move to, at this moment blind nut
Frictional force between spring housing to be overcome and pull bar, moves forward " Δ " value, it is ensured that can normal braking after abrasion.When
When getting off the brakes, under spring force, piston returns the tune gap gap of setting, but piston, blind nut, spring, sleeve,
Packing ring, spring housing, support set, hexagonal socket head plug have moved forward " Δ " value, during with rear braking, piston movement value
It is all the tune gap gap set, thus reaches control piston stroke and improve the purpose of brake sensitivity.
Spring shell type automatic clearance adjustment mechanism has the advantage of stepless-adjustment gap, is used widely.The many employings of spring housing are trapezoidal
Steel wire wound, is limited by spring housing manufacturing process, the general length of spring housing 6～9mm, for meeting frictional force needs,
Generally use 2～4 spring housing superpositions to use, between each spring housing, be in contact free state, infinite place mechanism.Make
Using middle discovery, the frictional force summation produced with pull bar after spring housing superposition is less than each spring housing and pull bar frictional force sum,
I.e. after superposition, frictional force has decay, frictional force decay to can reach the 30～40% of maximum.And spring housing and pull bar friction
Power decays, can cause piston cannot accurate return, cause piston clamping stagnation, i.e. occur that strap brake slides, and in turn results in and stops
Car is overheated, causes accident.
A kind of aircraft is disclosed in the innovation and creation respectively that patent publication No. is CN2908351 and CN2908354
Brake machine wheel, 3 spring housings in the automatic clearance adjustment mechanism of this wheel are all arranged on pull bar with free way, use
In all cause frictional force to decline.
Summary of the invention
For overcoming the deficiency making frictional force decline present in prior art, the present invention proposes a kind of automatic gap adjusting Hui Li
Mechanism.
Including hexagonal socket head plug, sleeve, support set, pull bar, spring housing, blind nut, compression spring.Identical by three
Turn composition spring housing be sleeved on pull bar；.Spring housing is positioned at one end at the bottom of sleeve internal barrel；End at spring housing
Packing ring is had between inner face at the bottom of face and sleeve cylinder.Support set is contained in sleeve, and makes an end face and the institute of this support set
Another end face stating spring housing coordinates.Described packing ring, spring housing and support set are all sleeved on pull bar.Plug screw is positioned at
Described sleeve has rib one end and is sleeved on described pull bar.Compression spring is sleeved on sleeve, and makes this compression spring
The inner surface of one end and blind nut push against, the other end of this compression spring pushes against with sleeve rib inner surface.Blind nut is set with
On pull bar, and make the outer face of described blind nut and the inner face laminating of pull bar one end.
Described pull bar uses integrated pull rod or combination type pull bar.The inner face of described pull bar one end refers to integrated pull rod
Flange inner face or the inner face of force transmitting board of combination type pull bar.
Described sleeve is the cylinder that there is end plate one end.Having pull bar installing hole at the center of this sleeve end plate, this pull bar is installed
The internal diameter in hole is than pull bar diameter big 0.5～1mm.External peripheral surface at the other end of this sleeve has the baffle plate of radially protruding.
The internal diameter of described sleeve is identical with the external diameter of spring housing, and the external diameter of sleeve is identical with the internal diameter of compression spring.
Described three spring housings all form with trapezoidal wire coiling.The external diameter of described spring housing is identical with the internal diameter of sleeve,
The internal diameter of spring housing is identical with the external diameter of pull bar.
There is step-like through hole at described blind nut center, the big 3mm of external diameter of the aperture ratio pull bar of its small aperture one end, macropore
The aperture of footpath end is identical with the external diameter of compression spring, enables one end of described compression spring to load in this blind nut, and with
The inner surface of blind nut pushes against.
There is the connecting plate coaxial with this pull bar one end of described integrated pull rod, and the external diameter of this connecting plate is more than outside blind nut
Footpath.Mounting process through hole is distributed on described connecting plate.Combination type pull bar includes T-bar and force transmitting board, T-bar
One end load described force transmitting board end face center hole, location in, constitute combination type pull bar.The external diameter of described force transmitting board
External diameter more than blind nut.
The present invention is after the deficiency analyzing existing spring shell type automatic clearance adjustment mechanism, according to the spy of aircraft brake wheel
A kind of improved form that point proposes, its objective is to provide a kind of and can improve the automatic of frictional force between spring housing and pull bar
Tiao Xi debooster, solves the card caused because of piston not return often occurred during current spring shell type debooster uses
Stagnant fault, improves the reliability that spring shell type debooster uses.The present invention uses pre-add compact form spring housing structure, disappears
Except existing structure assembling or using the gap existed between rear spring set end face, make multiple spring housing formation one whole
Body, improves the frictional force between combination rear spring set and pull bar, reduces piston catching phenomenon and occur.This automatic gap adjusting returns
Force mechanisms may be mounted at internal piston, it is also possible to is installed separately with piston, and the structural shape of pull bar can also suitably become
Change.
The automatic gap adjusting debooster of the present invention may be mounted at inside disk type brake wheel piston component, it is also possible to work
Plug assembly separately, is arranged separately on cylinder seat, and wherein pull bar can suitably adjust head construction as required.
The present invention is directed to the automatic clearance adjustment mechanism of existing spring shell type, by 3 spring housings are used pre-add clamping method,
Eliminate the gap existed between each spring housing end face, make 3 spring housings form an entirety, thus improve combination
Frictional force between rear spring set and pull bar.Compared with the automatic clearance adjustment mechanism of existing spring shell type, pre-add compact form is certainly
In dynamic debooster, the frictional force between spring housing and pull bar improves 26%～35%.
Accompanying drawing illustrates:
Accompanying drawing 1 is the structural representation of the present invention；
Accompanying drawing 2 is hexagonal socket head plug schematic diagram, and wherein Fig. 2 a is front view, and Fig. 2 b is sectional view；
Accompanying drawing 3 is sleeve schematic diagram；
Accompanying drawing 4 is integral type pull bar schematic diagram；
Accompanying drawing 5 is blind nut schematic diagram, and wherein Fig. 5 a is sectional view, and Fig. 5 b is front view；
Accompanying drawing 6 is combination type pull bar schematic diagram；
Accompanying drawing 7 is force transmitting board schematic diagram, and wherein Fig. 8 a is sectional view, and Fig. 8 b is front view.In figure:
1. plug screw；2. sleeve；3. support set；4. integrated pull rod；5. spring housing；6. packing ring；7. blind nut；8. compression bullet
Spring；9. combination type pull bar；10.T shape bar；11. force transmitting boards.
Detailed description of the invention
Embodiment 1
The present embodiment is a kind of automatic gap adjusting debooster, including hexagonal socket head plug 1, sleeve 2, support set 3, pull bar,
Spring housing 5, blind nut 7, compression spring 8.
Described pull bar 4 is the carrier of the present embodiment, and blind nut 7 is sleeved on pull bar, and makes the outer face of described blind nut 7
Fit with the inner face of pull bar one end.The inner face of described pull bar one end refers to flange inner face or the group of integrated pull rod
The inner face of the force transmitting board 11 of box-like pull bar.Described spring housing 5 is that three identical turns are sleeved on pull bar successively
On combine.Spring housing 5 is positioned at one end at the bottom of sleeve internal barrel；The inner at the bottom of the end face and sleeve cylinder of spring housing 5
Packing ring 6 is had between face.Support set 3 is contained in sleeve, and makes an end face of this support set 3 and described spring housing 5
Another end face coordinate.Described packing ring 6, spring housing 5 and support set 3 are all sleeved on pull bar.Plug screw 1 is positioned at
Described sleeve 2 has rib one end and is sleeved on described pull bar.Compression spring 8 is sleeved on sleeve 2, and makes this pressure
One end of contracting spring pushes against with the inner surface of blind nut 7, and the other end of this compression spring pushes against with sleeve 2 rib inner surface.
The endoporus of described hexagonal socket head plug 1 is hexagonal through hole.Hexagon ring inscribed circle diameter than pull bar diameter big 0.5～1mm,
External screw thread is had on excircle, this external screw thread and screw-internal thread fit on sleeve 2, it is used for compressing support set 3.The present embodiment
In, hexagon ring inscribed circle diameter 0.8mm bigger than pull bar diameter.
Sleeve 2 has the cylinder of end plate for one end.Pull bar installing hole is had, this pull bar installing hole at the center of this sleeve end plate
Internal diameter than pull bar diameter big 0.5～1mm.External peripheral surface at the other end of this sleeve has the baffle plate of radially protruding.
The internal diameter of described sleeve 2 is identical with the external diameter of spring housing 5, and the external diameter of sleeve 2 is identical with the internal diameter of compression spring 8.
In the present embodiment, the internal diameter 0.8mm bigger than pull bar diameter of described pull bar installing hole.
Support set 3 is cylindric, and its internal diameter is identical with the external diameter of pull bar, and external diameter is identical with the internal diameter of sleeve 2.
Pull bar is round bar shape, has two kinds, respectively integrated pull rod 4 and combination type pull bar 9.
Described integrated pull rod 4 is made up of pull bar shaft and connecting plate.Described connecting plate is positioned at one end of pull bar shaft,
The profile of the other end end of this pull bar shaft is six sides.The connecting plate that connecting plate is coaxial with this pull bar shaft, this is even
The external diameter of fishplate bar is more than the external diameter of blind nut 7.Mounting process through hole is distributed on described connecting plate.
Combination type pull bar 9 is combined by T-bar 10 and force transmitting board 11.One end of T-bar body 10 loads described biography
In the hole, location at power plate 11 end face center, constitute combination type pull bar 9.The other end end of described T-bar body
Profile is hexagon.On described force transmitting board, 4 mounting process through holes are distributed, and this mounting process through hole with
4 installing technological hole one_to_one corresponding on blind nut 7.The external diameter of described force transmitting board 11 is more than the external diameter of blind nut 7.
Spring housing 5 has three, is cylindrical shape, forms with trapezoidal wire coiling.The external diameter of described spring housing and sleeve
The internal diameter of 2 is identical, and the internal diameter of spring housing is identical with the external diameter of pull bar.Spring housing 5 is assemblied in sleeve 2, one end with
Packing ring 6 coordinates, and one end coordinates with support set 3, during work, and the inner surface of described spring housing and the outer surface of pull bar 4
Between produce frictional force, by this frictional force limit blind nut 7 movement.
Packing ring 6 is cirque structure, and side excircle has chamfering 1 × 45 °.Packing ring 6 is arranged in sleeve 2, and
Make end surface and the sleeve 2 endoporus bottom surface of chamfering.
Blind nut 7 is circular ring structure, and the external peripheral surface at this blind nut has the screw thread being connected with cylinder seat piston.At blind nut
There is step-like through hole at 7 centers, the big 3mm of external diameter of the aperture ratio pull bar of its small aperture one end, the aperture of large aperture end
Identical with the external diameter of compression spring 8, enable one end of described compression spring to load in this blind nut, and with blind nut 7
Inner surface pushes against.The end face of described blind nut is evenly equipped with 4 mounting process through holes, and described 4 mounting process
Through hole respectively with connecting plate on distribution mounting process through hole one_to_one corresponding.
During work, under the effect of hydraulic fluid pressure, compression spring 8 is compressed, and blind nut 7 moves forward.Work as blind nut
When the amount of movement of 7 is less, blind nut 7 does not contacts with sleeve 2 small end face, after hydraulic fluid pressure eliminates, and compression spring 8
Being elongated to the length after initial compression, blind nut 7 is by fight back.Along with the abrasion of brake disc, hydraulic fluid pressure applies again
Time, contacting with sleeve 2 small end face when blind nut 7 moves forward, the thrust that hydraulic oil produces is delivered to sleeve by blind nut 7
On 2, sleeve 2 moves forward, and 6, three spring housings 5 of band washer, support set 3 and hexagonal socket head plug 1 are forward
Mobile " Δ " distance.If now release hydraulic fluid pressure, compression spring 8 is elongated to the length after initial compression again,
By blind nut 7 by fight back, before now blind nut 7 does not weares and teares, move forward " Δ " distance relative to brake disc.Due to
The frictional force of three spring housings 5 and pull bar is more than spring maximum elastic force, therefore after this task, 6, three bullets of packing ring
Spring set 5, support set 3, hexagonal socket head plug 1 and sleeve 2 have moved forward " Δ " distance relative to pull bar.So,
Brake disc wear extent adds " Δ ", gap adjusting mechanism has moved forward " Δ " distance equally, it is ensured that braking gap
Constant, reach to regulate the purpose of braking gap, same compression spring 8 ensure that the reset function of mechanism, it is ensured that
Occur without strap brake in using and slide phenomenon.
Claims (7)
1. an automatic gap adjusting debooster, it is characterised in that include hexagonal socket head plug, sleeve, support set, pull bar, bullet
Spring set, blind nut, compression spring；The spring housing being made up of three identical turns is sleeved on pull bar；Spring housing
It is positioned at one end at the bottom of sleeve internal barrel；Packing ring is had between inner face at the bottom of the end face and sleeve cylinder of spring housing；Support suit
In sleeve, and an end face of this support set is made to coordinate with another end face of described spring housing；Described packing ring,
Spring housing and support set are all sleeved on pull bar；Plug screw is positioned at described sleeve to be had rib one end and is sleeved on described pull bar
On；Compression spring is sleeved on sleeve, and makes one end of this compression spring push against with the inner surface of blind nut, this compression
The other end of spring pushes against with sleeve rib inner surface；Blind nut is sleeved on pull bar, and makes the outer face of described blind nut
Fit with the inner face of pull bar one end；By three spring housings are used pre-add clamping method, eliminate each spring housing end
The gap existed between face, makes three spring housings form an entirety, thus improves combination rear spring set and pull bar
Between frictional force, and the frictional force of three spring housings and pull bar is more than spring maximum elastic force.
2. automatic gap adjusting debooster as claimed in claim 1, it is characterised in that described pull bar uses integrated pull rod or group
Box-like pull bar；The inner face of described pull bar one end refers to flange inner face or the biography of combination type pull bar of integrated pull rod
The inner face of power plate.
3. automatic gap adjusting debooster as claimed in claim 1, it is characterised in that sleeve is the cylinder that there is end plate one end；?
There is pull bar installing hole at the center of this sleeve end plate, and the internal diameter of this pull bar installing hole is than pull bar diameter big 0.5～1mm；
External peripheral surface at the other end of this sleeve has the baffle plate of radially protruding；Outside the internal diameter of described sleeve is with spring housing
Footpath is identical, and the external diameter of sleeve is identical with the internal diameter of compression spring.
4. automatic gap adjusting debooster as claimed in claim 1, it is characterised in that trapezoidal wire coiling all used by three spring housings
Form；The external diameter of described spring housing is identical with the internal diameter of sleeve, and the internal diameter of spring housing is identical with the external diameter of pull bar.
5. automatic gap adjusting debooster as claimed in claim 1, it is characterised in that there is step-like through hole at described blind nut center,
The big 3mm of external diameter of the aperture ratio pull bar of its small aperture one end, the aperture of large aperture end and the external diameter of compression spring
Identical, enable one end of described compression spring to load in this blind nut, and push against with the inner surface of blind nut.
6. automatic gap adjusting debooster as claimed in claim 2, it is characterised in that one end of described integrated pull rod has and is somebody's turn to do
The connecting plate that pull bar is coaxial, the external diameter of this connecting plate is more than the external diameter of blind nut；Installation is distributed on described connecting plate
Technique through hole.
7. automatic gap adjusting debooster as claimed in claim 2, it is characterised in that combination type pull bar includes T-bar and power transmission
Plate, one end of T-bar loads in the hole, location at described force transmitting board end face center, constitutes combination type pull bar；Described
The external diameter of force transmitting board is more than the external diameter of blind nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410229009.XA CN104061261B (en) | 2014-05-27 | 2014-05-27 | A kind of automatic gap adjusting debooster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410229009.XA CN104061261B (en) | 2014-05-27 | 2014-05-27 | A kind of automatic gap adjusting debooster |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104061261A CN104061261A (en) | 2014-09-24 |
| CN104061261B true CN104061261B (en) | 2016-08-31 |
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| CN201410229009.XA Active CN104061261B (en) | 2014-05-27 | 2014-05-27 | A kind of automatic gap adjusting debooster |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106763343A (en) * | 2017-02-17 | 2017-05-31 | 西安航空制动科技有限公司 | A kind of aviation spring shell type automatic gap adjusting piston component |
| CN108955976B (en) * | 2018-04-17 | 2020-04-28 | 西安航空制动科技有限公司 | Method for measuring friction force of spring sleeve |
| CN111503191A (en) * | 2020-04-22 | 2020-08-07 | 西安航空制动科技有限公司 | Piston gap adjusting device and aviation brake device piston |
| CN112696446A (en) * | 2020-12-30 | 2021-04-23 | 贵州新安航空机械有限责任公司 | Automatic clearance mechanism of transferring of expansion sleeve formula |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB662071A (en) * | ||||
| GB815015A (en) * | 1955-12-09 | 1959-06-17 | Bendix Aviat Corp | Automatic brakc adjuster |
| GB1204033A (en) * | 1967-12-29 | 1970-09-03 | Bendix Corp | Automatic brake adjuster mechanism |
| CN2908354Y (en) * | 2006-04-04 | 2007-06-06 | 王淑敏 | Airplane brake wheel |
| CN2908351Y (en) * | 2006-04-04 | 2007-06-06 | 王淑敏 | Airplane brake wheel |
| CN2908349Y (en) * | 2006-04-04 | 2007-06-06 | 王淑敏 | Airplane brake wheel |
-
2014
- 2014-05-27 CN CN201410229009.XA patent/CN104061261B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB662071A (en) * | ||||
| GB815015A (en) * | 1955-12-09 | 1959-06-17 | Bendix Aviat Corp | Automatic brakc adjuster |
| GB1204033A (en) * | 1967-12-29 | 1970-09-03 | Bendix Corp | Automatic brake adjuster mechanism |
| CN2908354Y (en) * | 2006-04-04 | 2007-06-06 | 王淑敏 | Airplane brake wheel |
| CN2908351Y (en) * | 2006-04-04 | 2007-06-06 | 王淑敏 | Airplane brake wheel |
| CN2908349Y (en) * | 2006-04-04 | 2007-06-06 | 王淑敏 | Airplane brake wheel |
Non-Patent Citations (1)
| Title |
|---|
| 《航空机轮和刹车装置状况监控技术的发展》;何永乐;《航空科学技术》;20000531;34-36 * |
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| Publication number | Publication date |
|---|---|
| CN104061261A (en) | 2014-09-24 |
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