Tail airplane wheel anti-deflection mechanism capable of being manually unlocked and automatically locked

Abstract

A tail airplane wheel anti-deflection mechanism capable of being manually unlocked and automatically locked comprises a shell, a piston, a lock pin assembly, a touch rod, a lock washer, a limiting nut, a spring, a manual rod and a wheel fork hole, the piston penetrates through an inner hole of the shell, the manual rod is located in the piston and coaxially arranged with the piston, the manual rod extends out of the end of the piston, the manual rod can slide in the piston, and the lock pin assembly is located in the shell. The position, extending out of the piston, of the manual rod is sleeved with a spring and a limiting nut, the spring is located in an inner hole of the limiting nut, the lock pin assembly comprises a U-shaped connector, a self-locking nut, a pin rod, a knuckle bearing and a lock pin, the U-shaped connector is provided with a through hole, the lock pin is provided with the knuckle bearing, and the pin rod penetrates through the knuckle bearing and the through hole of the U-shaped connector to connect the lock pin with the U-shaped connector. The U-shaped connector is connected with the manual rod through threads, the touch rod is arranged between the U-shaped connector and the limiting nut in a sleeved mode, a lock washer is arranged between the touch rod and the limiting nut, and the end, away from the U-shaped connector, of the lock pin extends into a wheel fork hole.

Description

TECHNICAL FIELD

[0001] The utility model relates to a helicopter landing gear technical field, in particular to a tail wheel anti -deflection mechanism of manual unlocking and automatic locking. BACKGROUND

[0002] The anti -deflection mechanism is arranged on the tail wheel of the helicopter, generally is by the lock pin into the wheel yoke hole of the machine wheel, is used for preventing the tail wheel deflection, is the key component on the helicopter landing gear, but the existing anti -deflection mechanism is inconvenient to operate and laborsome when manually unlocking. UTILITY MODEL CONTENTS

[0003] In order to solve the problems mentioned in the above background art, the utility model provides a tail wheel anti -deflection mechanism of manual unlocking and automatic locking.

[0004] The utility model discloses the following technical scheme: a tail wheel anti -deflection mechanism of manual unlocking and automatic locking, including casing, piston, lock pin assembly, touch lever, stop washer, limiting nut, spring, manual lever and wheel yoke hole, the piston passes through casing inner hole, the manual lever is located in the piston with the piston coaxial arrangement and extends the piston end, and the manual lever can slide in the piston, and the manual lever extends the spring and limiting nut of the piston place, and the spring is located in the inner hole of limiting nut, and the both ends of spring are respectively with the piston end face and the end face of limiting nut abutment fit together, the lock pin assembly includes by U type joint, self locking nut, pin rod, joint bearing and lock pin, the U type joint is equipped with through -hole, and the lock pin is equipped with joint bearing, and the one end of lock pin enters the U type joint, makes the inner ring of joint bearing with the through -hole on the U type joint coaxial, and the pin rod passes through joint bearing and the through -hole of U type joint and connects lock pin and U type joint, and uses self locking nut and fixes pin rod, and U type connector is connected with manual lever through thread, and touch lever is sleeved between U type connector and limiting nut, and the stop washer is arranged between touch lever and limiting nut, and the one end of lock pin away from U type connector enters the wheel yoke hole.

[0005] Further, the one end of the manual lever close to the touch lever is provided with a T-shaped groove, the inner hole of the touch lever sleeved at the manual lever and the U-shaped connector is provided with a boss, the inner hole of the stop washer is also provided with a boss, when installing, the bosses in the two inner holes are inserted into the T-shaped groove, and the outer circular boss of the stop washer is respectively bent to the end face of the limiting nut and the touch lever.

[0006] Further, the connecting place of the self locking nut and the U-shaped connector is provided with a gasket.

[0007] Further, the sealing ring is arranged between the casing and the piston.

[0008] Beneficial effects: compared with the prior art, the tail machine wheel anti-deflection mechanism capable of being manually unlocked and automatically locked, through the manual rod, spring, limiting nut, touch rod and lock pin assembly, the spring pushes the lock pin assembly to make the lock pin extend into the fork hole, the automatic locking of the machine wheel is realized, when manually unlocking, the touch rod is only needed to be pushed, the spring is compressed, the manual rod, limiting nut and lock pin assembly are moved, the lock pin is withdrawn from the fork hole to realize the unlocking, the structure is simple and reliable, and the operation is simple. BRIEF DESCRIPTION OF DRAWINGS

[0009] Fig. 1 It is the whole structure schematic view of the utility model,

[0010] Fig. 2 It is the sectional view schematic view of the utility model;

[0011] Fig. 3 It is the stop washer installation schematic view of the utility model;

[0012] In the drawing: 1 - shell, 2 - piston, 3 - lock pin assembly, 4 - touch rod, 5 - stop washer, 6 - limiting nut, 7 - spring, 8 - manual rod, 9 - sealing ring, 10 - fork hole, 301 - U-shaped joint, 302 - self-locking nut, 303 - pin rod, 304 - washer, 305 - joint bearing, 306 - lock pin. DETAILED DESCRIPTION

[0013] As Figs. 1 to 3As shown, a tail wheel anti-deflection mechanism which can be manually unlocked and automatically locked, comprising a shell 1, a piston 2, a locking pin assembly 3, a trigger lever 4, a stop washer 3045, a limiting nut 6, a spring 7, a manual lever 8 and a wheel fork hole 10, the piston 2 passes through the inner hole of the shell 1, the manual lever 8 is coaxially arranged in the piston 2 and extends out of the end of the piston 2, the manual lever 8 can slide in the piston 2, the spring 7 and the limiting nut 6 are sleeved on the extension of the manual lever 8, the spring 7 is located in the inner hole of the limiting nut 6, and the two ends of the spring 7 are respectively in abutment with the end faces of the piston 2 and the limiting nut 6; the locking pin assembly 3 comprises a U-shaped joint 301, a self-locking nut 302, a pin rod 303, a joint bearing 305 and a locking pin 306, the U-shaped joint 301 is provided with a through hole, the locking pin 306 is provided with the joint bearing 305, one end of the locking pin 306 extends into the U-shaped joint 301, so that the inner ring of the joint bearing 305 is coaxial with the through hole of the U-shaped joint 301, the pin rod 303 connects the locking pin 306 and the U-shaped joint 301 by passing through the joint bearing 305 and the through hole of the U-shaped joint 301, the self-locking nut 302 is used to fix the pin rod 303, the U-shaped joint is connected with the manual lever 8 through threads, which facilitates disassembly, maintenance and assembly, the trigger lever 4 is sleeved between the U-shaped joint and the limiting nut 6, the stop washer 3045 is arranged between the trigger lever 4 and the limiting nut 6 to prevent the trigger lever 4 from rotating, and one end of the locking pin 306 away from the U-shaped joint extends into the wheel fork hole 10 to prevent the wheel from deflecting.

[0014] One end of the manual lever 8 close to the trigger lever 4 is provided with a T-shaped groove, the inner hole of the U-shaped joint at the position where the trigger lever 4 is sleeved on the manual lever 8 is provided with a boss, the inner hole of the stop washer 3045 is also provided with a boss, when installed, the bosses in the two inner holes extend into the T-shaped groove, and the outer circular bosses of the stop washer 3045 are respectively bent to the end faces of the limiting nut 6 and the trigger lever 4, thereby playing a role of fastening and limiting and effectively preventing the rotation between the manual lever 8 and the trigger lever 4; the joint between the self-locking nut 302 and the U-shaped joint 301 is provided with a washer 304 to prevent the self-locking nut 302 from loosening; a sealing ring 9 is arranged between the shell 1 and the piston 2 to prevent fluid medium such as hydraulic oil from leaking.

[0015] The free state of the anti-deflection mechanism is an automatic locking state, the spring 7 pushes the limiting nut 6 and the locking pin assembly 3, so that the locking pin 306 of the locking pin assembly 3 extends into the wheel fork hole 10 to realize automatic locking and prevent the wheel from deflecting; when manual unlocking is needed, the trigger lever 4 is pushed to move to the left, the spring 7 is compressed, the limiting nut 6 and the manual lever 8 move to the left, the locking pin assembly 3 moves to the left, the locking pin 306 exits the wheel fork hole 10 to realize unlocking; after the manual unlocking operation is cancelled, the automatic locking state is restored under the elastic restoring action of the spring 7.

[0016] The above merely describes a preferred embodiment of the present application, and the protection scope of the present application is not limited thereto, and any skilled person in the art, according to the technical scheme and the inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A tailwheel anti-deflection mechanism capable of manual unlocking and automatic locking, characterized by: The invention comprises a housing (1), a piston (2), a locking pin assembly (3), a trigger rod (4), a stop washer (5), a limiting nut (6), a spring (7), a manual rod (8) and a wheel fork hole (10), wherein the piston (2) passes through the inner hole of the housing (1), the manual rod (8) is located in the piston (2) and is coaxially arranged with the piston (2) and extends out of the end of the piston (2), the manual rod (8) can slide in the piston (2), and the manual rod (8) is provided with a spring (7) and a limiting nut (6) at the position where the manual rod (8) extends out of the piston (2), the spring (7) is located in the inner hole of the limiting nut (6), and the two ends of the spring (7) are respectively in contact with the end face of the piston (2) and the end face of the limiting nut (6); the locking pin assembly (3) comprises a U-shaped joint (301), a self-locking nut (302), a pin rod (303), and a joint bearing (305). and a locking pin (306), wherein the U-shaped joint (301) is provided with a through hole, the locking pin (306) is provided with a joint bearing (305), one end of the locking pin (306) extends into the U-shaped joint (301), so that the inner ring of the joint bearing (305) is coaxial with the through hole on the U-shaped joint (301), the pin rod (303) passes through the joint bearing (305) and the through hole of the U-shaped joint (301) to connect the locking pin (306) to the U-shaped joint (301), the pin rod (303) is fixed with a self-locking nut (302), the U-shaped connector is connected to the manual rod (8) through a thread, the trigger rod (4) is sleeved between the U-shaped connector and the limit nut (6), a stop washer (5) is provided between the trigger rod (4) and the limit nut (6), and the end of the locking pin (306) away from the U-shaped connector extends into the wheel fork hole (10).

2. The tailwheel anti-deflection mechanism capable of manual unlocking and automatic locking according to claim 1, characterized in that: The manual rod (8) is provided with a slot at one end close to the trigger rod (4), and the trigger rod (4) is provided with a boss in the inner hole between the manual rod (8) and the U-shaped connector. The inner hole of the stop washer (5) is also provided with a boss. When installing, the bosses in the two inner holes extend into the slot, and the outer cylindrical boss of the stop washer (5) is bent to the end faces of the limit nut (6) and the trigger rod (4), respectively.

3. The tailwheel anti-deflection mechanism capable of manual unlocking and automatic locking according to claim 1, characterized in that: A washer (304) is provided at the connection between the self-locking nut (302) and the U-shaped joint (301).

4. The tailwheel anti-deflection mechanism capable of manual unlocking and automatic locking according to claim 1, characterized in that: A sealing ring (9) is provided between the housing (1) and the piston (2).

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