DE2449180A1 - SELF-LOCKING DEVICE FOR ROTATING SHAFTS - Google Patents

Description

Patent attorneys

Dr.-jng. ScKönwaid Diving. Th. Meyer Dr. Feet

Dipi.-Cliem. Alek vonKrelsIar Dbl.-Chem. AAcscIkowski-Keller

Dr.-Ing. G. Klöpsch ÖipUng. G. Selling

5 Cologne 1, Deichmannhaue

Oct 15, 1974

Terenzio Sessa, Via Albani 5, Varese, / Italy

Self-locking device for rotating shafts

The present invention relates to a self-locking device for rotating shafts, in particular for the movement of casement windows steering waves.

Fall window, 'such. B. the windows of vehicles exist generally from a lower fixed window part and an upper movable window part which is in an open position can be lowered.

The movement of said movable window part can by rotation of a shaft operatively connected to it by means of a suitable engine, such as. B. chain gear

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or rack and pinion.

As is well known to those skilled in the art, there are such Window types the need for devices which are capable of the movable window part in both the closed position as well as in the opening intermediate layers to deliver.

There are already different types of devices for this purpose has been proposed. One of them is e.g. B. in Italian Patent No. 494,349, the control shaft is built into the upper traverse of the fixed window part and a self-locking device with the shaft cooperates with springs.

A first torsion spring has one spring end bound to the shaft and the opposite spring end is with connected to a sleeve loose on the shaft. A second brake spring has a spring end that extends from one to the called sleeve is attackable, and the other spring end is located on the shaft by a stop Attack open to attack The second spring works with a hollow on the inner surface a fixed surrounding sleeve in such a way that the rotation of the y / elle in the sense of lowering the movable window part is blocked in a desired location.

Self-locking devices of this type require a rather complex and complex manufacture and are extremely * which is very bulky: that is why the upper traverse of the fixed one protrudes

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Window portion in an undesirable pronounced Y / else in the I ¹ ens he t he inn e.

The invention is based on the object of a self-locking device for rotating yokes of the brake type with spring to create a lighter, squatter and cheaper one Has construction than the known devices of the same type, so that the production of a very light, Window construction that takes up little space and is safe to work with is made possible.

According to the invention, this object is achieved in that a device is realized which consists of a single two-part spring; and a first Braking part with coils on the shaft under pretension and a second spring part, which is also pretensioned and whose turns are distanced from the shaft, the spring with opposing stops .des shaft housing having cooperating spring ends and wherein its two parts are connected to one another by a web who also works with the attacks mentioned. ■

Working together with the second spring part, the brake spring always brakes the free rotation of the Y / elle in any position stationary position of the movable window part in terms of its lowering movement »

The rotation of the shaft in the sense of the upward movement of the movable window part is due to the attack of the above-mentioned web against the associated stop of the

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Receiving housing of the shaft allows.

The shaft rotation in the opposite direction, on the other hand, is caused by the end of the brake spring engaging with the associated one Allow stop of the shaft housing: this spring part is therefore made to move away from the shaft to handle.

The structural and functional features of the invention and its advantages over the known prior art are highlighted even more clearly from a consideration of the following exemplary description, which refers to refer to the accompanying schematic drawing, and although shows

Pig. 1 is a partial axonometric view in greater detail Scale of a shaft incorporating the invention;

Pig. 2 is a longitudinal section;

Pig. 3 and 4 two different active states of the inventive Cross-sections depicting devices;

Pig. 5 shows a practical example of application of the invention on a window traverse; · '.

Pig. 6 shows a section along the line VI-VI in FIG. 5;

Pig. 7 shows a section along the line VII-VII in Pig. 5 and

Pig. 8 in vertical section one when the device according to the invention is used executable penster construction.

First, with reference to FIGS. 1 - 4 of the drawing, 10 shows part of the part and 11 shows its receiving housing.

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According to the invention, there is a total of 12 on the shaft shown and two parts 13> H having spring drawn up, which parts by a middle one from the same parts obtained web 15 with each other .Effectively connected. The turns of the spring part 13 lie on the shaft while the turns of the spring part 14 are loosely around the yoke itself.

The spring 12 has spring ends 16, 17 on the parts 13, H, respectively.

The mentioned spring ends 16, 17 and the web 15 are for this purpose determined, with opposite shoulders or obtained in the housing 11 of the shaft in the manner clearly shown Stops 18, 19 to work together.

The expediently pretensioned spring part 14 has the task of transmitting an uninterrupted torque through the spring part 13 to the shaft, which spring part 13 is continually required to exert a braking effect on the shaft 10, with its free rotation due to its The load transferred by the dead weight of the movable drop window part is prevented _o

When rotating the Y / elle 10 in the direction indicated by the arrow F. and the upward movement of the movable window part in a clockwise direction, the web 15 engages against the Stop 19 (Fig. 3) and in doing so it lifts the rotary element which transfers the spring part 14 to the spring part 13: thus the free rotation of the shaft 10 is made possible.

When the shaft is rotated counterclockwise according to arrow Fi, the spring part 13 remains on the shaft itself

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blocked and takes the spring part 14 in rotation with until the spring end 16 does not strike against the shoulder 18. At this point the spring part 13 is claimed to be from the v / rush to unwind and the torque of the spring part 14> which latter was relaxed in the rest position between the stops 18, 19 is transmitted to the wave itself, whereby the lowering movement of the balanced window part is braked.

When the wave is stopped by the lowering movement actuation the rotating force transmitted by the movable window part, the system returns to the equilibrium position shown in FIG return.

The device proposed by the present invention is extremely easy and inexpensive to manufacture on, and due to its compact design, it only requires a tiny installation space, which is in favor of the other structural components of the structure.

This remarkable advantage is particularly evident in the in Fig. 5-8 of the drawing highlighted the window structure shown. ■ "·

In Fig. 5, the spring 12 is mounted on a shaft 20 having a square cross-section. It will be there pointed to the simplicity of this attachment, which by the sole use .einer with the spring part 13 zuanfr acting and with the shaft 20 firmly connected sleeve 32 is realized; for this purpose, the sleeve 32 has a quadrangular one inner and an outer circular cross-section

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on (Pig, 7). According to the invention, the shaft 20 is on end bearings 21 mounted by interposing the hubs 22 of the pinion 23, by which the rotation of the shaft itself is controlled * For this purpose the hubs 22 are fixed to the shaft connected, the same having an inner square and an outer circular cross-section. the made of a suitable plastic such as the hubs 22 Bearings 21 are strangely snapped onto the ends of the cross member 24; one of these points to each Bearing on at least one retaining tooth 25 which engages in a corresponding catch 26 on the cross member 24. Except To hold the shaft, the bearings 21 according to the invention also act as fastening elements for fastening the traverse 24 on the window frame 27 »z. B. on his movable Part. They therefore have a shoulder 21a which is fastened to the frame 27 by nut screws.

Like from Pig. 5 of the drawing clearly shows, works the spring 12 together with an ordinary torsion spring 28, which is intended to counterbalance the weight of the movable window part. It is particularly simple and advantageous the here proposed attachment system of the spring 28. The same has a spring end 29 cooperating with the stops 18, 19 of the shaft housing, and the other spring end 30 is connected to the shaft itself by an adjusting ring 31, which has an inner square and a susseren Has circular cross-section.

This adjusting ring 31 also acts as an intermediate bearing for the shaft 20, which is therefore without undesired, the correct radio

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mode of operation of the complex "impairing deflections can turn.

Pig. 8 shows, for example, one according to the invention Truss complex integrating construction of a drop window. The minimum cross-beam external dimension is thus evidenced, that it does not protrude from the frame, which is a great functional as well as aesthetic advantage is achieved.

The invention is described with reference to a control shaft of the movable window part of a drop window type but it can also be used in other cases where the same problems exist "

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Claims (5)

2U918G _ 9 - Claims Γ1, A self-locking device for rotating Y / ellen, thereby characterized in that it contains a single spring (12) in two spring parts (13, H), namely a first braking part (13) with preloaded on the shaft (10) Coils and a second spring part (14) also biased, cooperating with and with the first, spring part (13) loose Y / indungen on the shaft (10), the spring (12) with opposite stops (18, 19) of the shaft housing (11) having cooperating spring ends (16, 17) and these said two spring parts (13 »14) by one Web (15) are interconnected, the (15) also with the mentioned stops (18, 19) cooperates (Fig. 1 - 4) ' 2. Device according to claim 1, characterized in that said Y / elle (20) has a square cross-section and is built into a window traverse (24) in which said housing is received, and that said first spring part (13) with the circular outer surface a sleeve (32) cooperates, which is fixedly connected to the shaft (20) by an inner square cross-section is. (Fig. 5,7) 3. Device according to claim 1 and 2, characterized in that said shaft (20) is mounted on end bearings (21) is, the snaps a'n the window traverse (24) with the interposition of the rotation of the \ 7elle (20) controlling have (22) of pinions (23) are attached, which (22) have a outer circular cross-section and through a 509820/0311 ' - ιό - inner square cross-section are connected to the shaft (20). (Fig »5) 4. Device according to. Claim 3, characterized in that said end bearings (21), fastening lugs (21a) for attaching the crossbar (24) to the window frame (27) own. (Fig. 5) 5. Apparatus according to claim 1, characterized in that that a second spring (28) cooperates with said spring (12) to counterbalance the weight of the movable window part, one spring end (29) of which cooperates with said stops (18, 19) and the opposite one The end of the spring (31) through an outer circular having shaped and inner square cross-section The adjusting ring (31) is connected to the shaft (20). (Fig «5, 6) 509820/031 1