CN204533055U - The two-way claw lock construction of undercarriage control pressurized strut - Google Patents

The two-way claw lock construction of undercarriage control pressurized strut Download PDF

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Publication number
CN204533055U
CN204533055U CN201520101243.4U CN201520101243U CN204533055U CN 204533055 U CN204533055 U CN 204533055U CN 201520101243 U CN201520101243 U CN 201520101243U CN 204533055 U CN204533055 U CN 204533055U
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piston
elastic card
chamber
pressurized strut
piston rod
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CN201520101243.4U
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Inventor
关维
邓晓山
孟清河
慕建全
鲁德发
路宏伟
吴林
王保相
张航舟
禹新鹏
贺一雄
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AVIC Landing Gear Advanced Manufacturing Corp
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AVIC Landing Gear Advanced Manufacturing Corp
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Abstract

The two-way claw lock construction of a kind of undercarriage control pressurized strut, comprise the urceolus that two ends are established by upper end cap and lower end cap seal, this upper end cap is provided with ozzle and communicates with outer tube inner chamber, the action piston of band piston rod is provided with in this outer tube inner chamber, this lower end cap is stretched out in one end of this piston rod, and the inner chamber hollow of this action piston and piston rod, arrange uplock control mechanism in the inner chamber of this action piston and piston rod, the outer tube inner chamber be arranged in outside this piston rod arranges down lock control mechanism.Uplock, folding and unfolding and bearing function are integrated in one by the utility model, and cost performance is high, save space, alleviate mechanism's weight.The utility model pressurized strut can be used for limited space, and weight demands is harsher, bears face load significantly and locks in pressurized strut mechanism.

Description

The two-way claw lock construction of undercarriage control pressurized strut
Technical field
The utility model relates to Aerial hydraulic attachments, and particularly one can be applicable to that space arrangement requirement is compact, weight demands is harsher, bears the two-way claw lock construction of undercarriage control pressurized strut of face load significantly.
Background technique
Pressurized strut is the energy conversion device hydraulic energy of input being changed into mechanical energy, is the executive component of hydraulic system, external work done and switching energy.In undercarriage control, it is that mechanical energy makes the flexible folding and unfolding of undercarriage by the hydraulic energy transfer of hydraulic oil.
Undercarriage retractable actuating cylinder is generally used for the draw-in and draw-off function of undercarriage, and its built-in mechanical lock is generally positioned at the two ends of pressurized strut piston, make pressurized strut volume large, Heavy Weight, even, also need in addition to arrange construction package---strut carrying and the load of support undercarriage in landing mission.The retractable actuating cylinder of the fighter plane undercarriage of indivedual model, according to the restriction of structure and load, a mechanical lock is only with in general inside, and is used for nose-gear, and pressurized strut volume is large, Heavy Weight.
Tradition undercarriage control pressurized strut construction profile size is large, Heavy Weight, function singleness, be not suitable for that space arrangement requirement is compact, weight demands is harsher, also need the situation of bearing face load significantly, have and uplock, folding and unfolding and bearing function cannot be integrated in one.
Model utility content
Technical problem to be solved in the utility model is, the problems such as the construction profile size brought for traditional locks pressurized strut is large, Heavy Weight, function singleness, there is provided a kind of undercarriage control pressurized strut of suitable for modern aircraft two-way claw lock construction, it can realize steadily locking under the effect of hydraulic pressure, and firmly, normal fluid pressure is unblanked in locking, and compact structure, lightweight, be easy to safeguard, reliable in quality function is many, save space.
First it should be noted that, the "left", "right" mentioned herein is relative Fig. 1-Fig. 4 carrier (paper).
For solving the problems of the technologies described above, the technical solution adopted in the utility model is, the two-way claw lock construction of a kind of undercarriage control pressurized strut, comprise the urceolus that two ends are established by upper end cap and lower end cap seal, this upper end cap is provided with ozzle and communicates with outer tube inner chamber, the action piston of band piston rod is provided with in this outer tube inner chamber, this lower end cap is stretched out in one end of this piston rod, and the left end outer tube wall of this action piston is provided with the oilhole for input hydraulic pressure oil, the inner chamber hollow of this action piston and piston rod, in the inner chamber of this action piston and piston rod, uplock control mechanism is set, the outer tube inner chamber be arranged in outside this piston rod arranges down lock control mechanism.
This uplock control mechanism comprises and to be fixedly arranged between this upper end cap and this outer tube inner chamber and to be in the upper elastic card claw of free spreading state, this action piston is provided with and upper elastic card claw can be made to enter and the upper support bushing being in contraction state in the inner chamber of upper elastic card claw one end, this piston rod cavity is provided with small piston, this small piston is provided with upper locked groove near one end of upper support bushing, this arranges chock in locked groove, the other end of this small piston is provided with by the spacing little spring of spring seat, this spring seat is fixedly connected with the inwall of piston rod, this chock can when upper elastic card claw enters locked groove, under little spring effect, enter elastic card claw and make it can not contraction deformation, realize that uplock is closed locks.
This down lock control mechanism comprises and to be arranged between this action piston and piston rod outer wall and to be in the lower elastic card claw of free spreading state, one end of the contiguous lower end cap of this outer tube inner chamber is provided with lower support lining, the internal diameter of this lower support lining can make this lower elastic card claw enter and be in contraction state, the left side of this lower support lining is provided with lower locked groove, catch piston is provided with in outer tube inner chamber between lower support lining and lower end cap, on the outer tube wall of this oilhole between action piston and catch piston, big spring is provided with between this catch piston and lower end cap, this catch piston can when lower elastic card claw enters lower locked groove, under big spring effect, enter lower elastic card claw endoporus makes it can not contraction deformation, realize that down lock is closed locks.
Being improved to further of such scheme, arranges adjustment pad between this action piston and lower elastic card claw.
Being improved to further of such scheme, spring seat is cup shell.
Being improved to further of such scheme, the termination arranged outside arc transiting surface of this upper and lower elastic card claw, can pass in and out upper and lower support bushing respectively swimmingly.
Being improved to further of such scheme, this lower support lining and urceolus are structure as a whole.
Below operating principle of the present utility model is introduced:
1. pressurized strut uplock structural principle
Pressurized strut uplock is used for undercarriage to be locked in retracted position.
As shown in Fig. 1 uplock open mode structural representation.When uplock needs closed, the oilhole E input hydraulic pressure oil of urceolus rod chamber, makes piston rod 2 regain.When upper elastic card claw 6 starts to enter the endoporus of the upper support bushing 8 be arranged on action piston 17, namely upper elastic card claw 6 becomes contraction state from free spreading state.Along with the withdrawal of piston rod 2, upper elastic card claw 6 can promote the elastic force relative movement left that chock 7 and small piston 5 overcome little spring 4.When the head of upper elastic card claw 6 enters upper locked groove B, namely can free spreading, the endoporus that now chock 7 enters elastic card claw 6 under the elastic force effect of little spring 4 makes it can not contraction deformation, and namely uplock realizes closed locking.
As shown in Fig. 2 uplock closed state structural representation.When uplock needs to unblank, pressure oil is entered by the ozzle A of urceolus rodless cavity, promotes small piston 5 and drives chock 7 to be moved to the left.When chock 7 moves to the endoporus that departs from upper elastic card claw 6 and no longer supports it, under hydraulic coupling active force left, upper elastic card claw 6 starts to shrink and departs from locked groove B.Like this, action piston 17 and piston rod 2 will lose constraint to start to be moved to the left, and realizes uplock and unblanks.
2. pressurized strut down lock structural principle
Pressurized strut down lock is used for undercarriage to be locked in extended position, and bears the landing load of main landing gear.
As shown in Fig. 3 down lock open mode structural representation.When down lock needs closed, pressure oil is entered by the ozzle A of urceolus rodless cavity, and piston rod 2 moves to left and stretches out.When piston rod 2 moves left to certain position, when lower elastic card claw 15 starts the lower support lining C entering urceolus 1, namely lower elastic card claw 15 becomes contraction state from free spreading state.Along with moving to left of piston rod 2, lower elastic card claw 15 can promote the elastic force that catch piston 13 overcomes big spring 12 and be moved to the left.Instantly when the head of elastic card claw 15 enters lower locked groove D, namely can free spreading, the endoporus that now catch piston 13 enters lower elastic card claw 15 under spring force makes it can not contraction deformation, and namely down lock realizes closed locking.Piston rod 2 realizes full stretching, extension.
As shown in Fig. 4 down lock closed state structural representation.When down lock needs to unblank, pressure oil enters urceolus rod chamber by oilhole E, promotes catch piston 13 and is moved to the left.When the supporting surface of catch piston 13 moves to the endoporus that departs from lower elastic card claw 15 and no longer supports it, under action of hydraulic force to the right, lower elastic card claw 15 starts to shrink and locked groove D under departing from.Like this, the action piston 17 of pressurized strut will lose constraint to start to move right, and namely realizes down lock and unblanks.
When down lock closes, lock gap adjusts by adjustment pad 16.
The utility model proposes a kind of built-in for pressurized strut two-way claw lock is arranged in piston rod inner chamber and the novel of action live plug head carry pressurized strut.Conventional retractable actuating cylinder is mainly used in the folding and unfolding of undercarriage on aircraft main landing gear, separately has construction package strut to play carrying and supporting effect.And the utility model pressurized strut is in the use of reality, all can lock in compression and full extended configuration, and the utility model pressurized strut mainly plays three aspects in actual use, one is the latch mechanism being built in piston rod cavity, after locking, when uplock is used; Two is the lower elastic card claws being arranged in action live plug head, locks at full extended configuration, after locking, not only when down lock use, also plays strut effect, bears the load of undercarriage in landing mission; Three is in folding and unfolding process, through the driving of hydraulic pressure, drives the flexible of pressurized strut piston rod, thus driving mechanism motion, play retractable actuating cylinder.Therefore, the utility model pressurized strut level of integration is high, and the workload decreasing maintenance and safeguard, compact structure, volume is little, can be widely used in the mechanism of undercarriage, have promotional value.The utility model pressurized strut overcomes the deficiencies such as existing lock pressurized strut takes up room greatly, weight large, function singleness, and the design for airplane motion mechanism saves space and weight.Uplock, folding and unfolding and bearing function are integrated in one by the utility model, and cost performance is high, save space, alleviate mechanism's weight.
The utility model pressurized strut can be used for limited space, and weight demands is harsher, bears in the lock pressurized strut mechanism of face load significantly.The utility model pressurized strut has been tried out in aircraft landing gear mechanism.
Accompanying drawing explanation
Pressurized strut structural representation when Fig. 1 is uplock open mode.
Fig. 2 is uplock closed state pressurized strut structural representation constantly.
Pressurized strut structural representation when Fig. 3 is down lock open mode.
Pressurized strut structural representation when Fig. 4 is down lock closed state.
In figure: 1-urceolus, 2-piston rod, 3-spring seat, 4-little spring, 5-small piston, the upper elastic card claw of 6-, 7-chock, the upper support bushing of 8-, 9-upper end cap, 10-obturages circle, 11-lower end cap, 12-big spring, 13-catch piston, 14-seal ring, elastic card claw under 15-, 16-adjusts pad, 17-action piston, A-ozzle, the upper locked groove of B-, C-lower support lining, locked groove under D-, E-oilhole.
Embodiment
As Figure 1-Figure 4, the utility model undercarriage control pressurized strut two-way claw lock construction one embodiment comprises the urceolus 1 that two ends are established by upper end cap 9 and lower end cap 11 envelope.This upper end cap 1 is provided with ozzle A and communicates with the inner chamber of urceolus 1, is installed with elastic card claw 6 between this upper end cap 1 and outer tube inner chamber.The action piston 17 of band piston rod 2 is provided with in this outer tube inner chamber, this lower end cap 11 is stretched out in one end of this piston rod 2, and the left end outer tube wall of this action piston 17 is provided with the oilhole E for input hydraulic pressure oil, the inner chamber hollow of this action piston 17 and piston rod 2, this action piston 17 is provided with the upper support bushing 8 that internal diameter mates with upper elastic card claw 6 in the inner chamber of upper elastic card claw 6 one end.The inner chamber of this piston rod 2 is provided with small piston 5, small piston 5 is provided with upper locked groove B near one end of upper support bushing 8, this is provided with chock 7 in locked groove B, and the other end of small piston 5 is provided with little spring 4, and the other end of this little spring 4 is spacing by the spring seat 3 be fixedly connected with piston rod 2.This spring seat 3 is preferably cup shell.Between this action piston 17 and outer wall of piston rod 2, lower elastic card claw 15 is set by adjusting pad 16, one end of the contiguous lower end cap 11 of this outer tube inner chamber is provided with lower support lining C, the internal diameter of this lower support lining C is less than this outer tube inner chamber, and matches with lower elastic card claw 15.In the present embodiment, this lower support lining C and urceolus 1 are integrated setting.The left side of this lower support lining C is provided with lower locked groove D, is provided with catch piston 13 in the outer tube inner chamber between lower support lining C and lower end cap 11, is provided with big spring 12 between this catch piston 13 and lower end cap 11.
When piston rod needs to stretch out, pressure oil is entered by the ozzle A of urceolus rodless cavity, promotes small piston 5 and drives chock 7 to be moved to the left.When chock 7 moves to the endoporus of the upper elastic card claw 6 of disengaging and no longer supports it, under action of hydraulic force, upper elastic card claw 6 starts to shrink and departs from locked groove B.Like this, the action piston 17 of pressurized strut will lose constraint to start to be moved to the left, and realizes uplock and unblanks.
Pressurized strut is under the effect of oil pressure, and piston rod outwards extends.Instantly, when elastic card claw 15 starts the lower support lining C entering urceolus 1, namely lower elastic card claw 15 becomes contraction state from free spreading state.Along with stretching out of piston rod, lower elastic card claw can promote the elastic force that catch piston 13 overcomes big spring 12 and be moved to the left.Instantly when the head of elastic card claw 15 enters lower locked groove D, namely can free spreading, the endoporus that now catch piston 13 enters lower elastic card claw 15 under the spring-force driven dual of big spring 12 makes it can not contraction deformation, and namely down lock realizes closed locking.Piston rod 2 is namely complete to be stretched.
When piston rod 2 needs to regain, pressure oil is entered by the oilhole E of the rod chamber of pressurized strut, promotes catch piston 13 and is moved to the left.When the supporting surface of catch piston 13 moves to the endoporus that departs from lower elastic card claw 15 and no longer supports it, under action of hydraulic force to the right, lower elastic card claw 15 starts to shrink and locked groove D under departing from.Like this, the action piston 17 of pressurized strut will lose constraint to start to move right, and piston rod 2 is regained, and realizes down lock and unblanks.
Pressurized strut is under the effect of oil pressure, and piston rod 2 is regained.When upper elastic card claw 6 starts to enter the endoporus of the upper support bushing 8 be arranged on action piston 17, namely upper elastic card claw 6 becomes contraction state from free spreading state.Along with the withdrawal of piston rod 2, upper elastic card claw 6 can promote the elastic force relative movement left that chock 7 and small piston 5 overcome little spring 4.When the head of upper elastic card claw 6 enters upper locked groove B, namely can free spreading, the endoporus that now chock 7 enters elastic card claw 6 under the spring-force driven dual of little spring 4 makes it can not contraction deformation, and namely uplock realizes closed locking.

Claims (8)

1. the two-way claw lock construction of undercarriage control pressurized strut, comprise two ends and sealed the urceolus (1) established by upper end cap (9) and lower end cap (11), it is characterized in that, the ozzle (A) that this upper end cap is provided with for input hydraulic pressure oil communicates with outer tube inner chamber, the action piston (17) of band piston rod (2) is provided with in this outer tube inner chamber, this lower end cap is stretched out in one end of this piston rod, and the left end outer tube wall of this action piston is provided with the oilhole (E) for input hydraulic pressure oil, the inner chamber hollow of this action piston and piston rod, in the inner chamber of this action piston and piston rod, uplock control mechanism is set, the outer tube inner chamber be arranged in outside this piston rod arranges down lock control mechanism.
2. the two-way claw lock construction of undercarriage control pressurized strut according to claim 1, it is characterized in that, this uplock control mechanism comprises and to be fixedly arranged between this upper end cap and this outer tube inner chamber and to be in the upper elastic card claw (6) of free spreading state, this action piston is provided with and upper elastic card claw can be made to enter and the upper support bushing (8) being in contraction state in the inner chamber of upper elastic card claw one end, this piston rod cavity is provided with small piston (5), this small piston is provided with upper locked groove (B) near one end of upper support bushing, this is arranged chock (7) in locked groove, the other end of this small piston is provided with by the spacing little spring (4) of spring seat (3), this spring seat (3) is fixedly connected with the inwall of piston rod, this chock can when upper elastic card claw enters locked groove, under little spring effect, enter elastic card claw and make it can not contraction deformation, realize that uplock is closed locks.
3. the two-way claw lock construction of undercarriage control pressurized strut according to claim 1, it is characterized in that, this down lock control mechanism comprises and to be arranged between this action piston and piston rod outer wall and to be in the lower elastic card claw (15) of free spreading state, one end of the contiguous lower end cap of this outer tube inner chamber is provided with lower support lining (C), the internal diameter of this lower support lining can make this lower elastic card claw enter and be in contraction state, the left side of this lower support lining is provided with lower locked groove (D), catch piston (13) is provided with in outer tube inner chamber between lower support lining and lower end cap, on the outer tube wall of this oilhole (E) between action piston and catch piston, big spring (12) is provided with between this catch piston and lower end cap, this catch piston can when lower elastic card claw enters lower locked groove, under big spring effect, enter lower elastic card claw endoporus makes it can not contraction deformation, realize that down lock is closed locks.
4. the two-way claw lock construction of undercarriage control pressurized strut according to claim 2, is characterized in that, arranges adjustment pad between this action piston and lower elastic card claw.
5. the two-way claw lock construction of undercarriage control pressurized strut according to claim 2, is characterized in that, spring seat (3) is cup shell.
6. the two-way claw lock construction of undercarriage control pressurized strut according to claim 2, is characterized in that, the termination arranged outside arc transiting surface of elastic card claw on this.
7. the two-way claw lock construction of undercarriage control pressurized strut according to claim 3, is characterized in that, this lower support lining and urceolus are structure as a whole.
8. the two-way claw lock construction of undercarriage control pressurized strut according to claim 3, is characterized in that, the termination arranged outside arc transiting surface of this lower elastic card claw.
CN201520101243.4U 2015-02-12 2015-02-12 The two-way claw lock construction of undercarriage control pressurized strut Active CN204533055U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106089853A (en) * 2016-08-25 2016-11-09 中航飞机起落架有限责任公司 The pressurized strut of a kind of built-in machines lock and the method locking, unblank thereof
CN109114066A (en) * 2018-08-27 2019-01-01 中国飞机强度研究所 A kind of pressurized strut

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106089853A (en) * 2016-08-25 2016-11-09 中航飞机起落架有限责任公司 The pressurized strut of a kind of built-in machines lock and the method locking, unblank thereof
CN106089853B (en) * 2016-08-25 2018-04-17 中航飞机起落架有限责任公司 The pressurized strut and its locking of a kind of built-in machines lock, the method unlocked
CN109114066A (en) * 2018-08-27 2019-01-01 中国飞机强度研究所 A kind of pressurized strut
CN109114066B (en) * 2018-08-27 2020-02-07 中国飞机强度研究所 Actuating cylinder

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