CN205592221U - Hatch door pressurized strut - Google Patents
Hatch door pressurized strut Download PDFInfo
- Publication number
- CN205592221U CN205592221U CN201620266562.5U CN201620266562U CN205592221U CN 205592221 U CN205592221 U CN 205592221U CN 201620266562 U CN201620266562 U CN 201620266562U CN 205592221 U CN205592221 U CN 205592221U
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- CN
- China
- Prior art keywords
- steel ball
- urceolus
- lock
- hatch door
- pressurized strut
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Abstract
The utility model discloses a hatch door pressurized strut, including urceolus and the inside end cover of urceolus, adopt snap ring formula connection structure to link to each other between urceolus and the end cover, carry out spacing lock tube to the steel ball lock in still including the urceolus, the internal surface of lock tube includes the face of cylinder and the ball face of smooth transition connection, during the spacing locking of steel ball lock, one side of the steel ball top surface of steel ball lock with make plausible spherical surface contact, leave the clearance between the opposite side of steel ball top surface and the face of cylinder, be equipped with the retaining ring between end cover and the lock tube. The utility model discloses simple structure, the adjustment lock clearance of being convenient for, the impact force of locking slows down, has greatly improved hatch door pressurized strut's performance and life -span to satisfy contemporary undercarriage's technical requirement's development trend. The utility model discloses use in modern undercarriage hatch door winding and unwinding devices, have extensive using value to civilian undercarriage pressurized strut and other pressurized struts.
Description
Technical field
This utility model belongs to undercarriage folding and unfolding actuating system field, particularly to a kind of hatch door pressurized strut.
Background technology
In present generation aircraft undercarriage control actuating system or the reciprocating system of need, all there is important execution function element hydraulic pressure retractable actuating cylinder.Hatch door pressurized strut also needs to after actuating system runs out of steam, the special machine locking device arranged by self, piston or the piston rod of actuating system are locked firmly into certain privileged sites, therefore in the actuator of major part Hydraulic System for Aircraft Landing Gear, in widely used hatch door pressurized strut, nearly all there is the scheme of inside and outside mechanical lock.
Steel ball locking device is commonly referred to as internal lock, and the hatch door pressurized strut structure of existing use steel ball lock design has the disadvantages that
First, use threaded between urceolus and end cap, easy fatigue damage, crack, pressure-bearing is limited and easy scratch cushion rubber.
Second, owing to locking the depressed part that position is spheroidal of steel ball on lock tube, therefore steel ball contact area is less, and impulsive force of being locked is relatively big, causes Ball Mill to undermine the abrasion to lock tube, affects performance and the life-span of hatch door pressurized strut.
3rd, lock gap is difficult to adjust and ensure.
Along with the development of modern aircraft design technology, proposing simple for structure compact to hatch door pressurized strut, it is easy to safeguard, reliability is high, stable performance, service life length requirement.
Summary of the invention
The purpose of this utility model is, for above-mentioned the deficiencies in the prior art, it is provided that a kind of hatch door pressurized strut improved.
For solving above-mentioned technical problem, this utility model be the technical scheme is that
A kind of hatch door pressurized strut, including urceolus and the end cap of outer barrel, it is characterised in that use snap ring-type attachment structure to be connected between described urceolus and end cap.
Use snap ring-type attachment structure, it is to avoid use and threaded cause structural fatigue to damage, improve bearing capacity and the life-span of hatch door pressurized strut.
As a kind of optimal way, described snap ring-type attachment structure includes packing ring, the first screw and the collar being arranged between urceolus and end cap, and packing ring is connected by described first screw with end cap, and this packing ring is positioned at the end face of urceolus and carries out spacing to urceolus.
Stoping end cap to move out by collar, the first screw and collar can stop end cap inward.
Further, in also including urceolus, steel ball lock being carried out spacing lock tube, the inner surface of described lock tube includes the face of cylinder and the Surface of Sphere being connected smoothly；During steel ball lock limiting locking, the side of the steel ball end face of steel ball lock contacts with Surface of Sphere, leaves gap between opposite side and the face of cylinder of steel ball end face.
By said structure, lock tube not exclusively covers steel ball, refinement lock tube and steel ball contact surface, reducing the impulsive force that steel ball is locked so that steel ball stress ratio is more uniform, steel ball and lock tube are the most easy to wear, ensure the performance of hatch door pressurized strut, extend the life-span of hatch door pressurized strut.
Further, it is provided with back-up ring between described end cap and lock tube.
Back-up ring is locked the adjustment in gap for hatch door pressurized strut, can ensure, by grinding back-up ring end face, gap of locking.
This utility model simple in construction, it is simple to adjusting lock gap, impulsive force of locking slows down, drastically increases performance and the life-span of hatch door pressurized strut, and the development trend that the technology meeting undercarriage in the present age requires.This utility model is used in present generation aircraft undercarriage door draw off gear, is with a wide range of applications civil aircraft undercarriage actuating cylinder and other pressurized struts.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of embodiment of this utility model.
Fig. 2 is that shown in Fig. 1, hatch door pressurized strut stretches out view when normally working.
Fig. 3 is the enlarged drawing in A portion in Fig. 2.
Wherein, 1 is Earring connector, and 2 is nut, and 3 is the first screw, and 4 is spring base, 5 is return spring, and 6 is the first free flow coupling, and 7 is back-up ring, and 8 is lock tube, 81 is the face of cylinder, and 82 is Surface of Sphere, and 9 is urceolus, and 10 is piston rod, 11 is piston, and 12 is steel ball, and 13 is stop sleeve, and 14 is the second screw, 15 is the second free flow coupling, and 16 is packing ring, and 17 is collar, and 18 is end cap, 19 is left end oil suction chamber, and 20 is right-hand member oil suction chamber, and 21 is gap, and 22 is through hole.
Detailed description of the invention
As shown in Figure 1 to Figure 3, an embodiment of the present utility model includes the end cap 18 within urceolus 9 and urceolus 9, uses snap ring-type attachment structure to be connected between described urceolus 9 and end cap 18.
Described snap ring-type attachment structure includes packing ring the 16, first screw 3 and the collar 17 being arranged between urceolus 9 and end cap 18, stops end cap 18 to move out by collar 17, makes end cap 18 be fixed at urceolus 9 left end；Packing ring 16 is connected by described first screw 3 with end cap 18, and this packing ring 16 is positioned at the end face of urceolus 9 and carries out spacing to urceolus 9.
This utility model carries out spacing lock tube 8 to steel ball lock in also including urceolus 9, and the inner surface of described lock tube 8 includes the face of cylinder 81 and the Surface of Sphere 82 being connected smoothly；During steel ball lock limiting locking, the side of steel ball 12 end face of steel ball lock contacts with Surface of Sphere 82, leaves gap 21 between opposite side and the face of cylinder 81 of steel ball 12 end face.
It is provided with back-up ring 7 between described end cap 18 and lock tube 8.Back-up ring 7 is locked for hatch door pressurized strut the adjustment in gap, can ensure gap of locking by grinding back-up ring 7 end face.Described back-up ring 7 is provided with an opening, tests the sealing property of urceolus 9 left end with this.
Described urceolus 9 hollow and both ends open, piston rod 10 is arranged in urceolus 9 and end cap 18, and piston 11 is sleeved on piston rod 10 afterbody, the second screw 14 and stop sleeve 13 and penetrates from piston rod 10 tail end and be fixed on piston rod 10 by piston 11.Steel ball locking device Integrated design is in piston 11, and spring base 4 and return spring 5 are positioned at end cap 18 and are enclosed within outside piston rod 10.The through hole 22 connecting left end oil suction chamber 19 it is provided with in spring base 4.Return spring 5 designs and is immersed in inside pressurized strut in hydraulic oil, is sleeved on spring base 4 outer end, and the top of spring base 4 is provided with oil-feed tank and fuel feed hole.Lock tube 8 is positioned at the right-hand member of end cap 18.
Urceolus 9 left end is provided with the first free flow coupling 6 being passed through pressure oil to urceolus 9 and end cap 18, urceolus 9 right-hand member is provided with the second free flow coupling 15 being passed through pressure oil to urceolus 9, and it is sealed that steel ball can be locked under the promotion of pressure oil by described piston rod 10 telescoping mechanism by steel ball lock locking and releasing.
This utility model also includes the left end oil suction chamber 19 being located at vertically in end cap 18 and the right-hand member oil suction chamber 20 being located on urceolus 9, and the first free flow coupling 6 and the second free flow coupling 15 are connected with left end oil suction chamber 19 and right-hand member oil suction chamber 20 respectively.Right-hand member oil suction chamber 20 refers to the access way of pressure oil when piston rod 10 stretches out, and is i.e. provided with electromagnetic valve on the second free flow coupling 15, and when piston rod 10 stretches out, pressure oil, from the second free flow coupling 15 oil-feed, enters urceolus 9 through right-hand member oil suction chamber 20；And left end oil suction chamber 19 refers to the access way of pressure oil when piston rod 10 is regained.When piston rod 10 extends, the second free flow coupling 15 is connected with right-hand member oil suction chamber 20；When piston rod 10 shrinks, the first free flow coupling 6 is connected with left end oil suction chamber 19.First free flow coupling 6 and the second free flow coupling 15 design the two ends, left and right at urceolus 9, solve the problem that pipe joint direction adjusts.
When hydraulic oil enters between urceolus 9 and piston 11 from the second free flow coupling 15, thus on piston 11, produce certain hydraulic coupling promote piston 11 and piston rod 10 to be moved to the left, after piston rod 10, piston 11 move to spring base 4 position, when spring base 4 is with when on piston 11,10 steel balls 12 of steel ball lock contact, and spring base 4 moves and compression retracteding position spring 5；When piston 11 moves on at lock tube 8 with steel ball 12, steel ball 12 is clamp-oned lock tube 8 by spring base 4 by piston 11, is pinned by piston 11.Lock tube 8 not exclusively covers steel ball 12, refinement lock tube 8 and steel ball 12 contact surface, improves lock tube 8 and manufactures processing request, reduces steel ball 12 and locks impulsive force, makes steel ball 12 stress ratio more uniform.When hydraulic oil enters from the first free flow coupling 6, spring base 4 compresses under the promotion of hydraulic oil, and return spring 5 slides, and steel ball 12 disengages from lock tube 8 and piston 11, and piston 11 just moves under hydraulic oil effect, and departs from lock tube 8 with steel ball 12 and unblank.Piston 11 can promote piston rod 10 inwardly to regain.
Its operation principle of the present utility model is: be fixed on installation stand by urceolus 9 by Earring connector 1 and nut 2.When normally working, pressure oil is entered urceolus 9 by the second free flow coupling 15 through right-hand member oil suction chamber 20, piston rod 10 is promoted to stretch out, when to end of travel, after piston rod 10, piston 11 move to spring base 4 position, when spring base 4 contacts with 10 steel balls 12 on piston 11, the motion of piston 11, spring base 4 compression retracteding position spring 5；When piston 11 moves on at lock tube 8 with steel ball 12, steel ball 12 is clamp-oned lock tube 8 by spring base 4 by piston 11, and piston 11 withstands back-up ring 7, is pinned by piston 11, steel ball 12 cannot disengage from lock tube 8 thus this utility model is locked in full extended position, ensures to lock gap by grinding back-up ring 7 end face；When hatch door pressurized strut is regained, pressure oil enters end cap 18 by the first free flow coupling 6 through left end oil suction chamber 19, oil pocket pressure promotes spring base 4, piston 11 to move, and piston rod 10 is regained, pressure oil enters between spring base 4 and piston rod 10 by end cap 18, now, spring base 4 is regained under oil pocket pressure, in the groove of the steel ball 12 being arranged on piston 11 retraction piston 11 under the effect of the pressure, so that piston 11 lock-off, built-in steel ball lock is opened, and promotes piston rod 10 to regain under the effect of pressure oil.
Claims (4)
1. a hatch door pressurized strut, including the end cap (18) that urceolus (9) and urceolus (9) are internal, it is characterised in that use snap ring-type attachment structure to be connected between described urceolus (9) and end cap (18).
2. hatch door pressurized strut as claimed in claim 1, it is characterized in that, described snap ring-type attachment structure includes packing ring (16), the first screw (3) and the collar (17) being arranged between urceolus (9) and end cap (18), packing ring (16) is connected by described first screw (3) with end cap (18), and this packing ring (16) is positioned at the end face of urceolus (9) and carries out spacing to urceolus (9).
3. hatch door pressurized strut as claimed in claim 1 or 2, it is characterised in that in also including urceolus (9), steel ball lock being carried out spacing lock tube (8), the inner surface of described lock tube (8) includes the face of cylinder (81) and the Surface of Sphere (82) being connected smoothly；During steel ball lock limiting locking, the side of steel ball (12) end face of steel ball lock contacts with Surface of Sphere (82), leaves gap (21) between opposite side and the face of cylinder (81) of steel ball (12) end face.
4. hatch door pressurized strut as claimed in claim 3, it is characterised in that be provided with back-up ring (7) between described end cap (18) and lock tube (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620266562.5U CN205592221U (en) | 2016-04-01 | 2016-04-01 | Hatch door pressurized strut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620266562.5U CN205592221U (en) | 2016-04-01 | 2016-04-01 | Hatch door pressurized strut |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205592221U true CN205592221U (en) | 2016-09-21 |
Family
ID=56922410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620266562.5U Active CN205592221U (en) | 2016-04-01 | 2016-04-01 | Hatch door pressurized strut |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205592221U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106314766A (en) * | 2016-11-25 | 2017-01-11 | 中航飞机起落架有限责任公司 | Landing gear actuator control lock |
-
2016
- 2016-04-01 CN CN201620266562.5U patent/CN205592221U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106314766A (en) * | 2016-11-25 | 2017-01-11 | 中航飞机起落架有限责任公司 | Landing gear actuator control lock |
| CN106314766B (en) * | 2016-11-25 | 2018-06-01 | 中航飞机起落架有限责任公司 | A kind of undercarriage actuating cylinder control lock |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |