CN201606331U

CN201606331U - Landing gear uplock for airplanes

Info

Publication number: CN201606331U
Application number: CN201020122998XU
Authority: CN
Inventors: 刁飞萌; 宋宪龙; 徐继红; 王永和; 蔡传军; 季茂龄
Original assignee: Harbin Aircraft Industry Group Co Ltd
Current assignee: Harbin Aircraft Industry Group Co Ltd
Priority date: 2010-02-11
Filing date: 2010-02-11
Publication date: 2010-10-13
Anticipated expiration: 2020-02-11

Abstract

The utility model discloses a landing gear uplock for airplanes. The landing gear uplock comprises a hook 1, a latch hook 2, a locking ring 3, a guide plate 4, an adjusting screw 5, a microswitch cable 6, an oil return opening 7, an emergency oil inlet 8, a normal oil inlet 9, a normal unlocking piston 10, an emergency unlocking piston 11, a lock case 12, a spring 13, a manual unlocking rocker arm 14, a blocking cap 15 and two seal rings 16. The landing gear uplock adopts two-section separable pistons; the inner chamber of the lock case 12 is divided into two mutually independent oil chambers through the two seal rings, so that the normal hydraulic system and the emergency hydraulic system are independent in the part of an actuating mechanism, as a result, when the normal hydraulic system in the actuating mechanism loses effectiveness, the work of the emergency hydraulic system cannot be influenced, thereby improving the reliability and the safety of a product; as the manual unlocking rocker arm is additionally arranged, the uplock is provided with the manual unlocking function, and the landing gear also can be released in the mechanical transmission manner even when all hydraulic energy is lost; and the utility model further has the advantages of simple structure and reliable performance.

Description

The undercarriage uplock

Technical field

The utility model belongs to the aeronautical engineering technology, relates to a kind of undercarriage uplock that is used for retractable landing gear is locked in the stowed position.

Background technique

The unlocking function of landing gear uplock is as breaking down, and then aircraft can't drop, is safely breakneck to the landing of aircraft.The modular design that Figure 2 shows that landing gear uplock (is seen " the 14th of airplane design handbook, the landing system that takes off design), it has represented the general design form of domestic existing aircraft takeoffs and landings frame system uplock mechanism, the unlocking function of this uplock generally is single remaining or the design of two remainings, and it is the unlocking function of the backup energy with the emergency hydraulic system as Redundancy Design, the problem that has normal and emergency hydraulic system commissure in actuator's (being the pressurized strut of unblanking of uplock) part, form Single Point of Faliure easily, can't satisfy the air worthiness regulation and the security requirement of up-to-date civil aircraft.

Summary of the invention

The purpose of this utility model is: a kind of novel undercarriage uplock is provided, and realizing that normal hydraulic pressure is unblanked and the hydraulic pressure of meeting an urgent need is unblanked does not partly have system's commissure in actuator; And be provided at normal and situation that emergency hydraulic system all lost efficacy under the function of manual unlocking uplock mechanically.

The technical solution of the utility model is: a kind of landing gear uplock comprises hook 1, latch hook 2, lock ring 3, guide plate 4, adjusts screw 5, sensitive switch cable 6, return opening 7, emergent filler opening 8, normal filler opening 9, normally unblank piston 10, emergent unlocking piston 11, lock housing 12, spring 13, manually unblank rocking arm 14, blanking cover 15, two seal rings 16.Normally unblank lock housing 12 and blanking cover 15 that piston 10 and emergent unlocking piston 11 be screwed onto together mutually is enclosed in the inner chamber of lock housing 12, and normally unblank piston 10 and emergent unlocking piston 11 respectively have a seal ring 16; The latch hook 2 and the rocking arm 14 of manually unblanking are installed on the lock housing 12 by same bolt, and keep certain power of locking by the torsion spring that is installed on the latch hook 2; Hook 1 and guide plate 4 all are connected on the lock housing by bolt, on the hook 1 torsion spring are installed also, make it keep certain power of locking; The rocking arm 14 of manually unblanking is fixed on the locating stud on the lock housing 12 by keeping spring 13; Normal filler opening 9, emergent filler opening 8, return opening 7 are arranged on lock housing.

When realizing normal unlocking function, normal filler opening 9 is to lock housing inner chamber fuel feeding and by return opening 7 oil returns, and it is protruding together that the piston 10 of normally unblanking promotes emergent unlocking piston 11, produce unlocking action, promote latch hook 2, release shackle 1 is decontroled the lock ring 3 on the undercarriage; When realizing the emergent unlocking function, emergent filler opening 8 fuel feeding also pass through return opening 7 oil returns, will promote emergent unlocking piston 11 and stretch out the generation unlocking action, promote latch hook 2, and release shackle 1 is decontroled the lock ring 3 on the undercarriage; When manually unblanking, the pilot spurs the rocking arm 14 of manually unblanking by cable wire, and the driving lever on it drives latch hook 2 and rotates, and release shackle 1 is decontroled the lock ring 3 on the undercarriage.

Effect of the present utility model is: adopt the separable piston of two-part, by two seal rings the inner chamber of lock housing 12 3 separate oil pockets have been divided into, realized that normal hydraulic system and emergency hydraulic system are at the independence of actuator part (promptly not commissure), when normal hydraulic system lost efficacy in actuator, emergency hydraulic system work be can not influence, reliability of products and Security improved; Increased the rocking arm of manually unblanking,, under the situation of the forfeiture all hydraulic energy, still can discharge undercarriage by mechanically operated mode for uplock provides the function of manually unblanking, simple in structure, reliable performance.

Description of drawings

Fig. 1 is the utility model undercarriage uplock structural representation of locking;

Fig. 2 is that existing landing gear uplock structure is formed schematic representation;

Fig. 3 is the schematic representation that the undercarriage uplock is installed aboard;

Fig. 4 is the normal hydraulic pressure of the utility model undercarriage uplock principle schematic of unblanking;

Fig. 5 is the emergent hydraulic pressure of the utility model undercarriage uplock principle schematic of unblanking;

Fig. 6 is the utility model undercarriage uplock principle schematic of manually unblanking.

Embodiment

Below in conjunction with accompanying drawing the present invention is elaborated.As shown in Figure 3, landing gear uplock is installed on the aircaft configuration by screw bolt and nut, and undercarriage is locked in collapsed state.

As shown in Figure 1, the uplock present condition is the lock state of locking.The lock ring 3 that is installed on the undercarriage is caught on by hook 1, and the keyed end of hook 1 is caught on by latch hook 2 and be locked.Latch hook 2 is installed on the lock housing 12 by bearing pin, and keeps certain power of locking by torsion spring.The unblanking of hook look is divided into that normal hydraulic pressure is unblanked, emergent hydraulic pressure is unblanked and meets an urgent need and manually unblank.

As accompanying drawing 1 and shown in Figure 4, when normal hydraulic pressure is unblanked, hydraulic pressure is entered by normal hydraulic pressure inlet 9, promote normally to unblank piston 10, it is protruding to promote emergent unlocking piston 11 by the piston 10 of normally unblanking, and the resisting moment that promotion latch hook 2 overcomes torsion spring clockwise rotates, and makes latch hook 2 deviate from the roller of the keyed end of hook 1, hook clockwise rotates under the effect of the gear down power of the unblank moment of torsion and lock ring 3 transmission of torsion spring, realizes unlocking function thereby decontrol lock ring.

As accompanying drawing 1 and shown in Figure 5, when using emergent hydraulic pressure to unblank, hydraulic pressure is entered by emergent hydraulic pressure inlet 8, and it is protruding directly to promote emergent unlocking piston 11, opens latch hook 2, realizes unblanking.

As accompanying drawing 1 and shown in Figure 6, emergent when manually unblanking when using, with the cable wire pulling rocking arm 14 of manually unblanking, the rocking arm 14 of manually unblanking is clockwise rotated open latch hook 2, realize unblanking.

An embodiment's of undercarriage down lock of the present invention pressurized strut the pistons work stroke of unblanking is 15mm, and the latch hook rotation angle of unblanking is 27.3 °, has that normal hydraulic pressure is unblanked, emergent hydraulic pressure is unblanked and manual unlocking function.This embodiment's performance satisfies the performance requirement of Y12F type short distance secondary-line-aircraft Landing Gear System and the requirement of CCAR23 portion air worthiness regulation fully.

Claims

1. landing gear uplock, comprise hook (1), latch hook (2), lock ring (3), guide plate (4), adjust screw (5), sensitive switch cable (6), return opening (7), emergent filler opening (8), normal filler opening (9), the piston (10) of normally unblanking, emergent unlocking piston (11), lock housing (12), spring (13), the rocking arm (14) of manually unblanking, blanking cover (15), two seal rings (16), it is characterized in that, normally unblank lock housing (12) and blanking cover (15) that piston (10) and emergent unlocking piston (11) be screwed onto together mutually is enclosed in the inner chamber of lock housing (12), and normally unblank piston (10) and emergent unlocking piston (11) respectively have a seal ring (16); The latch hook (2) and the rocking arm (14) of manually unblanking are installed on the lock housing (12) by same bolt, and keep certain power of locking by the torsion spring that is installed on the latch hook (2); Hook (1) and guide plate (4) all are connected on the lock housing by bolt, on the hook (1) torsion spring are installed also, make it keep certain power of locking; The rocking arm (14) of manually unblanking is fixed on the locating stud on the lock housing (12) by keeping spring (13); Normal filler opening (9), emergent filler opening (8), return opening (7) are arranged on lock housing.