DE2108898A1 - Reduction gears, in particular for operating roller shutters - Google Patents

Description

Cologne, the 24th. February 1971 my reference: 283o

Applicant : Mischler Fermetures
191 rue de Beifort
Besancon Doubs / France

Reduction gears, in particular for operating roller shutters

The invention relates to a reduction worm gear, in particular for Manual operation is suitable.

As is well known, roller shutters are often provided with a tubular shaft, Me contains compensating springs and which are connected to a reduction gear operated with a hand crank.

One of the objects of the present invention is to provide a worm reduction gear to create that is particularly applicable to the operation of shutters and that is space-saving and prior to installation in the Always small roller shutter box, into which the roller shutter is drawn, on the floor can be adjusted.

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For this purpose, according to the invention, the worm wheel is essentially coaxial with the shaft to be driven and arranged at one end thereof and with the shaft to be driven Wave through. Drive finger to common Rotation connected, which leave the worm wheel and the shaft ample mounting tolerance.

This gives a precise pivotal connection between the W _e lle and the worm wheel, without a risk of Bickierung due to misalignment of these two parts ·

The worm wheel and the worm of the reduction gear are preferably in one arranged two-part housing, which on the one hand pass through the drive fingers to the outside and on the other hand ensures that the reduction gear to the axis of the driven Shaft is held in the desired angular position, this housing between the end of the shaft and a fixed bearing held in place.

The drive of the reduction gear is preferably done by means of a hand crank, whose essential elements are combined with one another by means of elastic snap or locking connections are.

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The present invention can optionally be provided with a locking device at the end of a Be provided by pass. With such a Gate direction can be prevented when the shutters are completely rolled out or lowered has been, then rolling up the shutter in the wrong direction of rotation is initiated again. This door direction does not make the mechanism more bulky.

The whole mechanism is very well suited for production from plastic, but you can also use any other suitable material for its manufacture.

Further objects, features and gate parts of the invention will become apparent from the following description one of the explanatory and not the delimitation of the idea of the invention Exemplary embodiment with variants, reference being made to the accompanying drawings.

In the drawings shows:

Pig. 1 in a cross section along the line II in Pig. 2 an embodiment of the invention f

Pig. 2 shows a section along the line II-II in Pig. 1, which also shows part of the tubular shaft of the roller shutter

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to which the invention is attached _f

Pig. 3 shows the connection of the two housing halves of the reduction gear in a detailed section on the ends of the bearings of the snail j

in a side view a variant of the embodiment of the two housing halves ^

Pig. Figure 5 is a top view of the two in Pig. 4 illustrated G-ehäusehälften with which they connecting hinge,

Pig. 6 is a front view of the crank handle of the roller shutter ^

Pig. 7 shows a longitudinal section through the ball and cardan joint connection of the actuating device,

Pig. 8 shows a longitudinal section through the hand crank and its fastening mechanism

Pig. 9 shows a section along the line IX-IX in Pig.

Pig. 1o an external view of a variant that has a device for locking at the end of the passage is provided, one housing half being omitted i

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Pig. 11 a section along the line XI-XI in Pig. t

Pig. 12 shows a leil exterior view of a variant at

which is blocked with claws, whereby one half of the housing is also omitted here,

Pig. 13 is a detail view of the Pig, 1o and 11, showing a ^ usführungsbeispiel the lock finger j

In the embodiment shown in the drawings, the drive device is used to roll up and lowering a shutter placed in a box 1 and its (in Pig * 1 in dash-dotted lines lines indicated) apron 2 guided in sliding guides 3 and on a tubular Wave 4 (Pig · 2) rolls up. The tubular shaft 4 rotates about a fixed central axis 5 »with which it is connected by compensating springs, not shown.

The axle 5 has at its end a non-round part 6 and a shoulder 7, which is used for fastening the shaft serve in a camp 8, which is attached, for example, to the masonry (Pig.2).

φ The tubular shaft 4 is ssur common rotation

J? connected to a worm wheel 9, which is connected to a

- * Screw is driven to. To connect the shaft

~ »With the worm wheel 9 are used drive fingers 11, the

· * Run parallel to axis 5 and evenly

** spaced around these as it is from the pig.

1 and 2 is to be erethen

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In the illustrated embodiment, the drive fingers 11 are with the wheel disc of the Worm gear 9 formed in one piece and occur with little play in corresponding holes in the end flange 12 of the tubular shaft 4. According to one not shown As a variant, the drive fingers can also be designed in one piece with the end flange of the shaft 4 and engage in corresponding holes in the wheel disc of the worm wheel. It is essential that this drive finger Shaft 4 and worm wheel 9 connect to rotate together while engaging these two Leave an ample mounting tolerance for parts.

The worm wheel 9 has a hub 13 which projects laterally towards the shaft 4 and rests against the end flange 12 of this shaft 4. This hub is mounted on two half-shells 14 and 15 which fit on the end of the fixed axle 5 and in particular on the non-circular part 6 of this end of the axle 5, which is flattened on two sides, so that they form a fixed unit with this fixed axle 5 . The protruding in the direction of the bearing from the hub 13 of the worm wheel 9 part of the half-shells 14 _f 15 is provided with grooves.

The worm wheel 9 and the worm 1o are located in a housing which is made up of two housing parts 17 and is formed, which is essentially in the

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Central plane of the teeth of the worm wheel lie against each other. The part 17 of this housing adjacent to the shaft 4 faces the shaft 4 towards an opening 19 (Pig. 2) which is large enough for the drive fingers 11 to pass through when the worm wheel turns.

The part 18 of the housing is placed with a central opening 2o on the half-shells 14 »15,

ä at this * central opening 2o with the grooves 16

grooves corresponding to the half-shells are provided; therefore you can adjust the rotational position of the housing 17.18 to the fixed axis 5 can be determined at will. This peculiarity makes it possible to use the reduction gear, to be mounted on the floor on axis 5 and to align accordingly to this axis, before the whole thing is put into box 1. This avoids any fastening and Adjustment work inside the box, which always has little space 1.

In the embodiment according to JB ¹ Xg. 1 to 3, the two housing parts 17, 18 are connected on the one hand by screws that pass through holes 21 which are formed in the edges of the housing parts around the worm wheel 9 (Fig. 1), and on the other hand by eye bolts 22 which are threaded provided projections are screwed on the ends of the bearings of the worm 1o.Torsprünge 23, which are provided in the contact plane of the two housing parts 17 »18, contribute with the screws 22 to give this particularly stressed bearing a great strength.

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According to the one shown in FIGS. 4 and 5 Variants are the two housing parts opposite the screw bearing with a hinge connected, that of an axis 24 on one of the two housing parts and two half-hooks 25 on other housing part is formed. After placing the hook 25 on the axis 24 can the two housing halves with the hook bolts 22 as in the previous example be locked together. This assembly of the housing is particularly simple, convenient and economically.

The screw Io with several screw flights enables a suitable reduction, it is but drivable in both directions.

It has at its ends frustoconical pins 26 and 27, which in corresponding, frustoconical Recesses 28 and 29 engage in housing parts 17 and 18. So a brake occurs only when the worm wheel 9 rotates, which corresponds to the lowering of the collade, the reduction gear still being used both on the left and on the right of the shaft 4 can be, there is play in the screw's bearing or receptacle in the longitudinal direction formed and an intermediate ring Jo between the screw and the bottom of the bearing on the one Side arranged where no braking is desired, as shown in FIG.

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The housing 17, 18 is laterally on the one hand by the bearing 8 and on the other hand by the flange 12 of the tubular shaft 4 held.

The snail Io is with a shaft Jl non-circular, for example square, cross-section driven, which the screw on the runs through the entire length and exits through an opening 32 from the box 1 to here in a To engage a blind hole with a corresponding cross-section in a joint ball 33, which is shown in a corresponding, attached to the box 1 bearing 34- is mounted. A simple pin 34-a is sufficient for fastening the shaft 31 in the joint ball. This type of assembly leaves a great deal of freedom to adapt to the wedging the reduction on axis 5 in the angular direction.

From Fig. 7 it can be seen better that the bearing 34 can be elastic by making it made of plastic, for example, so that the joint ball 33 can be elastically latched can assemble. The joint ball 33 »which are made of the same material can, has an elastic fork 35, in which you can also by elastic locking can snap a shaft 36, which in turn is formed by two fork joints Has universal joint 37, the axes of which are at right angles to each other. The other axis again engages with elastic locking

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-loin a fork 39 with which a sleeve 4o is provided. The one from the joint ball, the Universal joint and the sleeve formed unit forms a universal joint.

The sleeve 4o has a corrugated blind hole 41 into which a connecting shaft 42 intervenes. A simple pin 43 connects the shaft 42 to the sleeve 4o.

The transmission just described is very simple, robust and easy to assemble.

According to the illustration in FIGS. 8 and 9, the shaft 42 is provided with a hand crank 44.

This hand crank has an upper handle 45 which slide on the shaft 42 and itself can turn. The downward movement of this handle 45 is limited by a sleeve 46, which is mounted on the shaft 42 like the sleeve 4o. The sleeve 46 has a square Shank, with which it can be placed between the arms of a holding fork as shown in FIG. 9 can insert, which is attached to the wall with an anchor 48.

In order to avoid that the shaft 42 with the hand crank 44 inadvertently emerge from the holding fork 47, the handle 45 locked these parts on the holding fork 47 by being with his lower, frustoconical edge the ends

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the arms of the holding fork engages, which are extended upwards for this purpose.

This system has the advantage that it ensures the safety of the device when the braking device of the reduction gear fails because the fork, whose arms are due to of the handle cannot move away from each other, prevents the shaft 42 from rotating.

The crank arm, which is articulated with an axis 5 ° is attached to the sleeve 46, has stops 51, which in the working position with the sleeve 46 cooperate as shown in FIG. 8, so that the user with the arm at the turn of the hand crank hits the lower end of the shaft 42.

The crank arm also features a lower handle 52, with a joint ball 53 by elastic engagement in a receptacle 54 of the crank arm is mounted.

The device shown in FIGS to limit the throughput has the following parts:

two gears 55 and 56 with straight, cylindrical Toothing, both of which are provided with a locking finger 57 »and in the half-housings 17 and 18 are arranged, which are designed to accommodate them accordingly. The gear 56 is firmly connected to the hollow worm wheel 9.

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The relative number of teeth of the gears 55 »56 is determined the maximum number of rotations that the shaft 4- can make. The two truncated cone rings 62 and 65 are a variant of the truncated cone-shaped receiving bearings 28 and 29 (Fig. Lo). The receptacle 6o of the gear 55 is provided in the housing half 17.

The gear 56 driven by the worm gear 9 drives the gear 55. The weight the roller shutter apron transmits via the gear 56 a thrust on the screw 9 »which engages the truncated cone 65 in the conical Hing 63 allowed if no more torque with the hand crank is exerted on the worm.

When the locking fingers 57 and 58 are in contact with one another (FIG. 13) "the gear 56 is blocked against rotation and the worm 9" tries to move towards the frustoconical ring 62 under the action of a torque exerted by the hand crank. The friction that is developed at the level of this ring 62, then sets the counter force exerted on the handle and transmitted through the worm, and relieves proportional the locking fingers 57 and 58th

In the variant according to FIG. 12, the conical ring is replaced by a claw system. Once the two parts 67 and 68 of the claw system in engagement with each other in this variant, is any further with the hand crank to the

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Force exerted by the screw at the level of the claw ring 67 is thrown back entirely and exclusively.

The invention is for driving any stretching motion suitable. Their use is particularly beneficial in the actuation of collades.

Of course, the described and illustrated embodiments of the invention can be used in particular by using technically equivalent means to modify in various respects, without to depart from the scope of the present invention.

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Claims (14)

Annex to the letter dated Feb. 24, 197I my reference: 283o Claims Reduction gear, especially for the operation of roller shutters, with a worm drive, characterized in that the worm wheel (9) is essentially coaxial with the driving one Shaft (4) and is arranged at one end thereof and that the worm wheel (9) with the to be driven Shaft (4) is connected by drive fingers (ll) for common rotation, the one Allow electrical displacement between the worm wheel (9) and the shaft (4). 2. Transmission according to claim 1, characterized in that the worm wheel (9) and the Screw (Io) are enclosed in a two-part housing (17 »18), the two parts of which are essentially are connected to one another in the central plane of the teeth of the worm wheel (9), the a part (17) of the housing is designed for the drive fingers (II) to pass through. - 15 109841/1117 3. Transmission according to claim 2, characterized in that the two parts of the housing (17 »18) with screws (22) screwed onto the ends of the bearing (28) of the worm (Io) are connected. 4. Transmission according to claim 3 »characterized in that the two parts of the housing (17» 18) opposite the bearing (28) of the screw (lo) are connected to one another by a joint (24, 25). 5. Establishments according to one of claims 2 to 4, characterized in that the worm wheel (9) and the housing (17, 18) on a fixed shaft (5) by means of a non-rotating bearing (14, 15) are mounted, which on the one hand forms a pivot bearing for the worm wheel (9) and on the other hand Has grooves (16) which enable the assembly of the part (18) of the housing which is remote from the shaft (4) (17) »which is also provided with grooves, in the desired rotational position relative to the stationary one Allow axis (5). 6 · Transmission according to claim 5, characterized in that that the bearing consists of two half-shells (14, 15) on a non-round part (6) of the fixed axis (5) are appropriately placed. 109841/1117 - 16 - 7 transmission according to claims 5 or 6, characterized in that the reduction gear between the end (12) of the to be driven Shaft (4-) and a bearing is arranged, which is supported by a shoulder (7) of the fixed axis (5) is being held. 8. Transmission according to one of claims 2 to 7 »characterized in that the bearing (28, 29) the screw (lo) in the housing (17 »18) frustoconical Has brake mounts, with which correspondingly frustoconical projections (26, 27) can cooperate at the ends of the screw (Io), with a game being provided for Arrangement of an intermediate ring (3o) between the worm (lo) and the bearing (28, 29) on the one Side where no braking should occur. 9 · Transmission according to one of claims 2 to 7 »characterized in that the receiving bearing the worm (Io) in the housing (17 »18) has at least one claw brake projection. Io. Transmission according to claims 8 or 9 »characterized in that there is a device for locking at the end of a pass, which consists of a hollow worm wheel (9) connected gear (56) and a pinion (55) which is carried by the housing (17, 18), 10 9 8 4 1/1117 wherein the gear (56) and the pinion (55) locking fingers (57, 58) are provided. 11. Transmission according to one of the preceding claims, characterized in that the The screw (lo) is driven by means of a hand crank, the shaft (42) of which is connected to the shaft (31) the worm (lo) is connected by a universal joint, one of which is an element with a Joint ball (33) is combined for mounting the worm shaft (31) on a fixed bearing (34) is used. 12. Transmission according to claim 11, characterized in that the hand crank arm (44) with the shaft (42) of the hand crank (52) is connected by a sleeve (46), the stops (51) has, which is the size of the inclination of the | Limit the hand crank arm (44) to the shaft (42). 13 · Transmission according to claims 11 or 12, characterized in that certain elements the hand crank by elastic locking with their neighboring parts are connected. 14. Transmission according to claims 11, 12 or 13 »characterized in that the hand crank shaft (42) with a non-circular cross-section 109841/1117 " ¹⁸ " 2108893 Part can be inserted into a fork (4-7) and
one sliding along the shaft (42)
Has handle (45) which cooperates with the fork (47) to lock the shaft (42) in the fork. 109841 A1 117 Blank page