Power lock landing gear

IPC classes for russian patent Power lock landing gear (RU 2068799):

B64C25/10 - retractable, foldable, or the like

Another patents in same IPC classes:

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Device to decrease aircraft undercarriage length / 2488523

Invention relates to aircraft engineering. Undercarriage comprises leg to be hinged to aircraft airframe and lower part with wheels mounted thereat. Lower part can move relative to said leg. Additionally, undercarriage comprises device decreasing undercarriage length between extended and retracted positions. Said device comprises interconnected first and second means. Said first means is engaged with undercarriage lower part or with moving element to displace together when lower part displaces relative to leg. Second means is articulated to airframe to allow it go to stop unless undercarriage is in retracted position.

(57) Abstract:

Usage: the invention relates to the field of aviation, and more specifically, to landing devices, and in particular to a retractable landing gear, and is intended for fixation of the retracted chassis. The inventive rocking emergency lock opening kinematically connected with the axis of the upper link of dusenyka through the stop interacting with emphasis intermediate sleeve that is installed on the axis of the upper link of dusenyka with the possibility of transmission of motion and is not associated with the arm to ensure the opening of the lock in the normal mode, interacting with a drive cylinder and associated with a return spring. 3 Il.

The invention relates to the field of aviation, and more particularly to a landing devices, and in particular to a retractable landing gear, and is intended for fixation of the retracted chassis. The invention can find application in hoisting machines.

Known for the design of the power lock chassis of the aircraft [1] intended to commit the retracted chassis. This castle contains pivotally mounted on the axis of the spring-loaded hook rigidly mounted on the other axis the lever with the role of ETA axis pivotally mounted latch, one shoulder of which is pivotally connected with the lower link of dusenyka, and the other is in contact with the hook.

During operation with the opening of the lock, in the closed position under load held them landing gear is the wear of the contact surfaces of the latch and hook that changes the profile of the contacting surfaces, resulting in changes in the kinematics of the castle, and this reduces the reliability of his work.

Known also power lock chassis plane [2] containing pivoted on the axis of the hook, duosonic, the upper link which is pivotally mounted on the other axis, and the lower hinge is connected to the hook. Upper part of dusenyka has a lever for connection with the actuator and is provided with a return spring, one end of which is in contact with the upper link, and the other is mounted on a bracket. Thus, on the Central axis of dusenyka also mounted a spring, the other end of which is fixed to the bracket. The castle also has a third spring one end of which is attached to the hook, and the other on the bracket.

This lock design eliminates the disadvantages of the power lock chassis, famous and.with. USSR N 171270. However, in case of emergency ukryvnogo efforts must be enabled in the kinematic scheme of the castle of additional elements, that will complicate the design and increase its mass. In addition, the overcoming of this effort reduces the ease of controlling the lock in an emergency situation.

Object of the present invention is to provide a lock design that reduce the effort of opening in an emergency situation.

The task is ensured by the fact that the power lock chassis of the plane containing the hinge mounted on the axis of the spring-loaded hook, duosonic, upper part of which is installed on another and is interacting with a drive cylinder lever with return spring and the lower link pivotally connected to the hook, according to the invention, provided is connected to handle emergency opening rocker, swivel mounted on the intermediate sleeve, fixed to the possibility of transferring the movement on the axis of the upper link of dusenyka and having the focus, contact emphasis intermediate sleeve, the upper link of dusenyka installed on this axis also with the possibility of transferring the movement, and the lever, interacting with a drive cylinder mounted relative to the axis of the hinge.

Thus, the rocking chair serving for an emergency lock opening, kinematically connected with the axis ω, interacting with a drive cylinder and connected with a return spring. As a result, the force from the return spring is not transmitted to the handle emergency opening, whereupon the force of the emergency lock opening is reduced, and the convenience of controlling the lock in this situation increased.

The applicant does not know the sources of information that describe the power lock chassis of the plane with the same set of essential features that gives reason to believe that the proposed solution meets the criteria of the invention of "novelty."

The applicant also known sources of information, in which the problem is solved by above in the description of distinctive features, which confirms the compliance of the proposed solution the criterion of "inventive step".

In Fig. 1 shows the proposed castle, General view; Fig. 2 section a-a in Fig. 1; Fig. 3 section b-B in Fig. 1.

Power lock chassis plane contains the hook 1 (Fig. 1), hinged on axis 2 (Fig. 2) between the cheeks 3 and 4. On axis 4 (Fig.3) by connecting a square profile has the upper link 6 dusenyka, and the lower link 7 is pivotally connected to the hook 1 (Fig. 1). At oside shoulder which is provided with a roller 10 (Fig. 1) and in contact with the rod (drive) hydraulic cylinder 11, and the other shoulder is in contact with the side surface of the upper link 6 dusenyka and connected to a return spring 12 with the cheeks 3 and 4 through the axis 13. In addition, the Central axis 14 (Fig. 3) dusenyka spring 15 through the bolt 16 is connected to the cheek 3 and the axis 5 of the cheek 4 by connecting the square profile of the intermediate sleeve 17, a pivotally mounted emergency rocking, 18, with emphasis 19 (Fig. 1) in contact with the stop sleeve 17.

During normal operation of the hydraulic opening of the lock is as follows. When the supply pressure in the drive cylinder 11 (Fig. 1) his rod extends and presses the roller 10 of the lever 9, which is rotated relative to the intermediate sleeve 8 (Fig. 3), the other shoulder it interacts with the upper link 6 (Fig. 1) dusenyka, resulting in duosonic is overcoming the force of the return spring 12. When the hook 1 is rotated and releases the earring 20 landing gear. The rocking chair 18 in this mode the motion is not passed, as it is pivotally mounted on the sleeve 17, which, turning, out of contact with the stop 19 of the rocker 18.

Upon failure of the hydraulic system Uvarovo wiring 21 (Fig. 1) turn the rocker 18, through which the stop 19 communicates with an emphasis intermediate sleeve 17, is rigidly connected with the axis 5 (Fig. 3), resulting in the axis 5 is rotated, and the lever 9 (Fig. 1) with the return spring 12 remains stationary. The movement of the axle 5 is transmitted to the upper link 6, rigidly connected with the axis 5 (Fig. 2), as a result, duosonic formed, rotates the hook 1 (Fig. 1), and earring 20 landing gear is released. Thus, in case of emergency opening of the lock, the force of the return spring 12 is not perceived handle associated with the rocker 18 wiring 21, which reduces the force required for opening the door and provides ease of management in an emergency situation.

The manufacture and Assembly of proposed power lock landing gear possible in terms of existing pilot and serial production.

Power lock chassis of the plane containing the hinge mounted on the axis of the spring-loaded hook, duosonic, upper part of which is installed on a different axis and is interacting with a drive cylinder lever with return spring and lower pivotally connected to the hook, characterized in that it has connected to the handle emergency opening rocker, articulated dusenyka, and having the focus, contact emphasis intermediate sleeve, the upper link of dusenyka installed on this axis also with the possibility of transferring the movement, and a lever cooperating with a drive cylinder mounted relative to the axis of the hinge.