RU2480376C1 - Aircraft parking brake valve locking mechanism - Google Patents

Abstract

FIELD: transport.

SUBSTANCE: invention relates to aircraft engineering, particularly, to aircraft parking brake valve locking mechanism. Proposed mechanism comprises spring-loaded handle body with retainer to engage with the grooves of comb attached at valve body. Handle body is composed of two parts accommodating axle with limiter and compression spring to move said handle upward. Note here that at attachment of handle body, axle is rigidly coupled with valve lever while body is articulated with said lever. Note also that parking brake valve is furnished with protective shutter rigidly fixed at handle.

EFFECT: higher reliability, simplified design.

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Description

The present invention relates to aeronautical engineering, namely to the brake system, can also be used in general engineering.

Known control knob (1), containing a pivotally mounted pivot arm in the housing, rigidly mounted in the housing and having protrusions on the side surface, a sector with grooves interacting with the protrusion of the slider, on which the dog is pivotally mounted with a roller in contact with the side surface of the sector, spring-loaded a rod with a trigger and an emergency release rod installed in the groove of the pivot arm connected to the slider, and the spring-loaded rod is made interacting with the slider through the dog.

The disadvantage of this handle is the operation of the mechanism elements in mutually perpendicular planes, which can lead to jamming.

The closest technical solution, selected as a prototype, is a 625300A compressed air crane for controlling the lifting and lowering of the chassis (2), consisting of a crane body with a sector secured to it with grooves, a handle with a locking mechanism consisting of a compression spring and a clamp entering the grooves of the sector.

A significant drawback of this technical solution is that when the compression spring is destroyed, spontaneous disengagement of the mechanism is possible.

The objective of the invention is to remedy these disadvantages, namely improving the reliability and ease of use, as well as simplifying the design of the locking mechanism of the crank handle of the parking brake.

The task is achieved by the simplicity of design and a small number of parts, making it possible to use it in various systems and mechanisms. Even if the compression spring fails, the claimed mechanism remains operational.

Compared with the prototype and other identified technical solutions, the proposed handle is new, has an inventive step and is industrially applicable.

The invention is illustrated by drawings, where:

figure 1 shows a General view of the mechanism;

figure 2 is a section aa;

figure 3 is a view of B.

On the lever 1 of the parking brake valve 2 there are two holes on which the locking mechanism handle is fastened, consisting of two parts of the housing 3 and 4. At the bottom of the handle housing 4 is a latch 5, which is a prism-shaped protrusion. In the upper parts of the cases 3 and 4 are interconnected by three screws 6.

Inside the handle there is an axis rigidly fixed with the lever 1 of the crane 2 with a limiter 7 and a compression spring located on it 8. Oval holes are made in the handle cases opposite the upper holes of the lever 1 of the crane 2 with two spacer bushings 9 located in them, allowing the bodies 3 and 4 to be freely move along the axis of the lever 1 due to the gaps between the rigidly connected axis 7 with the lever 1 and the bolt connection. In the lower hole of the lever 1 is a pin 10, rigidly fixing the axis with a stop 7 relative to the lever 1 of the crane 2, excluding its rotation. In the mechanism, the pin 10 is held directly by the walls of the handle bodies 3 and 4. The handle and the axis with the stop 7 are attached to the lever 1 of the crane 2 through the spacer sleeves 9 with the help of a bolt 11, a nut 12 and a washer 13. A protective shutter 14 is attached with the same bolt to protect the lower part of the mechanism from foreign objects. Directly on the body of the crane 2, a comb with prismatic grooves 15 is attached, which, when engaged with the latch 5, ensures that the lever 1 of the crane 2 is fixed in two predetermined positions.

The mechanism is as follows.

To unlock the crane 2, pull the handle 3 and 4 up and towards you. When lifting the handle 3 and 4 up, the spring 8 between the limiter axis 7 and the inner part of the housing is compressed. The oval openings of the body move up, the latch 5 disengages from the groove of the comb 15. The lever 1 of the crane 2 moves to another position to the next groove. The spring 8 returns the parts of the housing 3, 4 of the handle to its original position, engaging the retainer 5 with the groove of the comb 15.

This ensures reliability, ease of use, simplicity of design, as well as the shape and material of the handle correspond to ergonomic requirements, taking into account the average anthropometric data of the brush, which allows the pilot to experience maximum comfort.

The implementation of the invention makes it possible to install a parking brake valve in any part of the cockpit, without taking up much space.

Currently, the proposed invention released working drawings, made a prototype that has successfully passed the test.

Information sources

1. Patent SU 1580738 A1, dated 07/07/1988, B64C 13/04

2. Catalog of serial products. State Scientific and Technical Publishing House, Oborongiz, Moscow 1960, p. 62.

Claims (1)

The locking mechanism of the parking brake valve of the aircraft, comprising a spring-loaded handle housing, on which a latch is located that engages with the grooves of the comb mounted on the crane body, characterized in that the handle housing is made of two parts, inside of which there is an axle with a limiter and a compression spring , to move the handle up, while in the place of attachment of the housing of the handle provides a rigid connection of the axis with the lever of the crane and a movable connection of the body with the same lever, and to en parking braking is provided with a protective shutter that is rigidly attached to the handle.

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