DE2445013A1 - DRIVE UNIT WITH A SOCKET SCREW - Google Patents

Description

7421Rl6 / H / bt Sept. 17, 1974.

Rhine aircraft construction
Company with limited liability

Drive unit with a jacket screw

The invention relates to a drive unit for light aircraft, the drive ßine rest position within and an operating position outside of the vehicle configuration.

It is already known by motor sailors for gliding operations provide pivotable propeller drives. Here will be Ti-iebverk and propeller by a pivoting movement in the fuselage or the wing collapsed. It can be done in this way Significantly reduce drag for glider operations; disadvantageous but the required construction is complex and complex Valve mechanism. This arises from the fact that flaps are required for folding in and unfolding an engine with a propeller which are the cutout in the fuselage or wing for and extend. In addition, the propeller is always must be locked in a fixed position, otherwise it will not can be accommodated in the narrow fuselage. It must also be taken into account be that when folding the drive unit a Shift in the center of gravity of the aircraft occurs. Another flaw is that by tilting the engines, the carburettors either run empty or overflow and there are difficulties starting when starting comes.

BATH ORIGINAL

6098U / 018B

The object of the invention is to provide a simple arrangement for light aircraft to create with a retractable and retractable drive unit.

This object is achieved according to the invention in that a Clad screw into the area outside of the Vehicle contour can be extended and the jacket of the jacket screw in the retracted position the vehicle contour in the area of the passage opening added.

This design makes it possible to have the largest possible diameter of the drive unit ™ without impairing the aircraft contour to make it come true. Furthermore, the advantage is achieved that the movable jacket screw on the same side the cover function of the passage opening takes over and no additional elements are required for the cover. By using a Mantelschraubc the Ausfahrxeg smaller than with conventional propellers, because of Due to the higher power load, jacket screws have a smaller diameter in relation to air screws. The resulting smaller extension path becomes the lever arm of the thrust force reduced, so that less load changes than with the necessarily larger free propellers attached above the fuselage are created * This eliminates the otherwise necessary inclination the propeller axis with the associated loss of performance.

In this proposed arrangement, it is irrelevant whether the jacketed screw is lifted out with a directly flanged motor or just the jacket screw itself, while the drive unit remains in the fuselage.

To improve the covering function of the jacket screws, we will continue to use proposed that the rear edge of the jacket of the jacketed screw is designed as a slant cut. This creates a

6 0 9 8 U / 0 1 8 5 BAD

particularly favorable cover, including the drive parts, created br.w. it is possible to make the passage opening relatively small and thus obtain a small opening for powered flight.

In order to arrange the drive motor in a cell-fixed manner in every operating state, is provided in a further embodiment of the invention that the actuator by an adjustable drive square with a revolving belt drive is formed in the manner of Nuremberg scissors.

A simple design of the drive square is that two opposite nodes of the drive square as an- and output are designed, while the other »nodes are connected to an actuator for extending and retracting.

Uni has a good degree of efficiency when transmitting through the circulating To achieve belt drive, it is proposed that the belt drive is formed by a toothed belt and toothed as input and output roles serve.

An exemplary embodiment of the invention is shown schematically in the drawing shown.

Show it

Fig. 1 shows a drive unit without a fuselage contour and

2 shows a Uumpfkontur with a drive unit without actuator for the drive square in the retracted and extended position.

The actual drive unit is made up of a drive motor 1 and an edge screw 2 is formed. The rear edge 3 of the jacket 4 of the Jacket screw 2 is designed as a bevel cut. The drive

60981 A / 01 85

motor 1 is connected to the jacket screw 2 via a drive square 5 » consisting of scissor arms 6, 7 »8 and 9» and a rotating one Belt drive 10 coupled. The drive square 5 is constructed in the manner of Nuremberg scissors, and the node 11 as The connection point of the scissor arms 6 and 9 is the drive point connected directly to the drive motor 1. For this purpose, a toothed roller 12 is arranged in the node 11. The opposite node 13 as the connection point of the scissor arms 7 and 8 also has a toothed roller 14 as an output, which is connected to the jacket screw 2 is connected. The other nodes 15 and 16 of the drive square 5> which are formed by the connection points of the scissor arms 6 and 7 or 8 and 9, serve as points of application for an actuator for changing the drive square 5 and thus for extending and retracting the jacket screw 2 from a fuselage contour 17 ·

In this case, the actuator is driven by one at the node 15 or 16 engaging bumper 18 and 19, respectively, which at their other end each have one side of an arm 20 connected is. This boom 20 is a spindle 21 means of a drive motor 24, the boom 20 being additionally guided by a guide rod 22 parallel to the spindle 21. The articulation points of the bumpers l8 and 19 are designed as ball joints in the nodes 15 and l6 and on the arm 20 .

When the boom 20 is moved over the spindle 21, the node becomes 13 of the drive square 5 with the jacket screw 2 opposite the node 11 and the drive point, which are to be regarded as the fixed point, are extended or retracted. Since the circumference of the drive square 5 in each

- 5 -

6098U / 0186

the position for the revolving belt drive, which in this case as Toothed belt is designed, is always the same, a drive element with a corresponding extension and retraction kinematics is created in this way. The drive motor 1 is fixed within the cells the body contour 17 is arranged, while the jacket screw 2 can be extended via the drive square 5. For this purpose there is a passage opening in the Rurapf contour 17 in the extension area of the jacket screw 2 23 arranged, which in the retracted state of the man- t.eIscrew 2 covered by the upper part of its jacket / + is. Since the rear edge 3 of the jacket 4 is designed as a bevel cut is, it is also possible to cover the drive square 5 without additional flap arrangements.

- patent claims -

6098U / 0185

Claims (4)

7421Rl6 / ll / bt Sept. 17, 1974 claims 1. Drive unit for light aircraft, wherein the drive has a rest position inside and an operating position outside the vehicle contour, characterized in that a jacket screw (2) via an actuator in the area outside the vehicle contour (17) and the jacket (4) of the Jacket screw (2) in the retracted position complements the vehicle contour in the area of the passage opening (23). 2. Drive unit according to claim 1, characterized in that g e k e η η - shows that the rear edge (3) of the jacket (4) of the jacket screw (2) is designed as an oblique angle. 3 · Drive unit according to claim 1 and 2, characterized in that the actuating drive by an adjustable Drive square (5) with a "revolving belt drive (10) is formed like a pair of Nuremberg scissors. 4. Drive unit according to claim 3 »characterized by g e k e η η that two opposite nodes (11, IS) of the drive square (5) designed as input and output are, while the other nodes (15 »16) with an actuator for extending and retracting are connected. 6098U / 01 85 5 · Drive unit according to claim 3 and 4 »characterized in that the belt drive (10) by a toothed belt is formed and serve as input and output toothed rollers (12, 14). 6098U / 018B