RU2457370C1 - Appliance to interconnect two elements of structure - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: proposed appliance comprises hook and lock made up of spring-loaded handle arranged to turn on end axle and having main and two lateral surfaces articulated with lock clamp that may turn on main and intermediate axles. Lock is furnished with hollow case secured to one of elements to be connected. Vertical walls of said case has bores made to receive end, main and intermediate axles. Handle is provided with spring-loaded clevis. Clamp has "П"-shape brace and cam mechanism made up of two cams fitted on main axle and rigidly jointed by extra axle and drive with rod. Hook is articulated with cams.

EFFECT: higher reliability.

9 dwg

Description

The device proposed as an invention relates to structural elements of aircraft and may find application in the installation of removable hatches and panels in zero gravity conditions on inhabited orbital stations.

From the patent literature there is known a locking mechanism for joining two parts, comprising a lock and a hook mounted using an over-center lever mechanism on a mounting pin passing through a slot in the body of the hook (RU No. 20133316, B64C 1/14).

The closest to the proposed one can be considered a lock for connecting two panels in an aircraft structure using a hook that can be coupled with a holder, one-piece connected to the first element. And with the help of the main axis, rigidly fixed to the second element. The lock contains a handle mounted rotatably on the end axis, and a swivel connection having a pair of clamping jumpers mounted rotatably on the main axis and on the intermediate axis. The hook is located between the handle and the main axis, and at least one clamping jumper has guides made with the possibility of contacting with the surface of the hook facing the handle when opening the lock.

The disadvantage of both the analogue and the prototype is that the pulling force in them is transmitted tangentially to the surfaces to be joined and requires the loads on the handle to be proportional to the ratio of the lever arms to create a force sufficient to create structural elements, and requires additional fixation of the operator. In addition, this device cannot create a force perpendicular to the joined surfaces, which is required for the installation of hatches and panels, and also in these analogues there is an additional device that prevents accidental opening of the lock during operation.

The problem to which the invention is directed is to increase the reliability of the connection without additional fixation devices and ease of use.

The problem is solved in that in a device for connecting two structural elements to each other, containing a hook and a lock, consisting of a spring-loaded handle mounted to rotate on the end axis and having a main and two side surfaces, pivotally connected to the locking clamping device, with the ability turning on the main and intermediate axes, the lock is equipped with a hollow body fixed on one of the connected elements, in the vertical walls of which holes are made for the end, main and the intermediate axis, the handle is equipped with a spring bracket, the clamping device has a U-shaped strut and is equipped with a cam mechanism made of two eccentrics and a drive with a rod interacting with the lower part of the U-shaped strut rigidly interconnected by an additional axis of the cam, the upper part of which is pivotally connected to the side surfaces of the handle, and the lower part of its spring, the opposite part of which is fixed on the end axis, the hook is movably connected to the eccentrics, the inner surface of its closing part is parallel to the joined surfaces, and the opposite has guide grooves under the intermediate axis.

Figure 1 presents a General view of the proposed device for connecting between two structural elements - side view, figure 2 is a top view, figure 3 is a section aa of figure 2, figure 4 is a section bb figure 3, figure 5 is a section bb In figure 3, figure 6 is a section GG figure 3, figure 7 is the lock in the closed position, figure 8 is the lock in the open position, figure 9 is a General view of the device in a perspective view.

The device for interconnecting two structural elements 1 and 2 comprises a hook 3 and a lock consisting of a spring-loaded 4 handle 5 mounted rotatably on the end axis 6 and having a main 7 and two 8, 9 side surfaces pivotally connected to a clamping device 10 the castle.

The locking device of the lock is mounted to rotate on the main 11 and intermediate 12 axes.

The lock is placed in a hollow body 13, in the vertical walls of which holes 14, 15 and 16 are made for the installation of the end 6, main 11 and intermediate 12 axes, respectively. The lock is installed in the housing 13 so that the handle 5 is a continuation of one of the connected elements 1.

The spring clip 17 is mounted on the handle 5 with the possibility of rotation relative to the axes 18, spaced at a distance of "L". For ease of use, a recess 19 is made on the handle 5 under the spring clip 17.

The clamping device consists of a U-shaped strut 20 and is equipped with a cam mechanism made of two eccentrics 21, 22 and a drive 23 with a rod 24, which are mounted movably on the main axis 11, rigidly interconnected by an additional axis 25.

The lower part of the U-shaped strut 20 is movably connected to the rod 24 of the drive 23. On the rod 24 is also fixed one of the ends of the spring 4 of the handle 5. Its other end is fixed on the end axis 6.

The hook 3 is movably connected to the eccentrics 21 and 22, the inner surface of its trailing part 26 is parallel to the joined surfaces of the elements 1 and 2, and the opposite has guide grooves 27 under the intermediate axis 12.

The device works as follows.

With the index finger of one hand, the user engages the spring bracket 17 (due to the recess 19 on the handle 5, this is convenient and easy to do) and pulls the handle 5 towards itself.

The handle 5 through the hinge 10 transmits the movement to a U-shaped strut, which in turn through the rod 24 and the actuator 23 interacts with the eccentrics 21 and 22 and drives them in a rotational movement.

As soon as the hinge 10 crosses the line passing through the centers of the end 6 and additional 25 axes, the spring 4 will cease to restrain the accidental opening of the lock. Two eccentrics 21 and 22 of the cam mechanism rotate the hook 3 relative to the main axis 11 in the open position.

To connect the two structural elements 1 and 2, they are installed under each other, the user with the movement of one hand acts on the handle 5, returning it to a horizontal position.

The U-shaped strut 20 through the rod 24 and the actuator 23 transmits rotational motion to the eccentrics 21 and 22, which rotate the hook 3 relative to the main axis 11 in the opposite direction. By moving the intermediate axis 12 along the guide grooves 27, the locking part of the hook will return to the horizontal position and the hook will be removed in the dimensions of the housing 13.

This will allow you to press the second structural element 2 to the first without preliminary preloading (this is possible even with a skew) due to the fact that when the center of the swivel 10 approaches the line connecting the centers of the axes 6 and 25, and due to the fact that the force vector applied to the handle 5, is close to 90 ° with respect to the same line, the force acting on the drive 23 of the cam mechanism will increase sharply (with a force of ≈3 kgf applied by the user to the handle 5, the force on the hook will be more than 300 kgf).

In this position, the handle 5 with its inner surface rests on the housing 13, the lock is in a stable closed position. From spontaneous opening it holds the spring 4.

The use of a cam mechanism in the design of the proposed device allows a significant increase in the output force, so the user (an astronaut on a manned orbital station in zero gravity), with little effort on the handle when opening and closing, can install or remove hatches and panels with one hand. Due to the resulting distribution of clamping forces, the proposed device is reliable in operation.

Claims (1)

A device for interconnecting two structural members, comprising a hook and a lock, consisting of a spring-loaded handle mounted rotatably on an end axis and having a main and two side surfaces pivotally connected to a locking clamping device that can be rotated on the main and intermediate axes, characterized in that the lock is equipped with a hollow body fixed to one of the connected elements, in the walls of which holes are made for the end, main and intermediate axes, the handle equipped with a spring bracket, the clamping device has a U-shaped strut and is equipped with a cam mechanism made of two eccentrics rigidly interconnected on the main axis by an additional axis and a drive with a bar interacting with the lower part of the U-shaped strut, the upper part of which is pivotally connected with the side surfaces of the handle, and the lower part of its spring, the opposite part of which is fixed on the end axis, the hook is movably connected to the eccentrics, the inner surface of which is locked jacent portion parallel to the mating faces, and the opposite has guide slots for the intermediate shaft.

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