Control device for electric motor-reducing unit

(54) Designation Control device for electric gear motors for driving a roller shutter (56) Published publications --- (57) Summary The invention relates to¹ an electric gear motor control device which allows control of the motor's rotation stop point.

The device has a slide (53) which, by sliding in a direction (56) in a first step, provides for disassembly of cams (12) and projections (15 '') on a rocker arm (15), which is arranged to open the motor switch when the projections are in the grooves (14 '') of the chambers (12). In a second step, the slide (53) causes oscillation of a double lever (45) carrying a shaft (13) on which the grooved cams (12) are rotatable. Each of the grooved cams (12) has a heart-shaped cam (33) and a gear (22), which are arranged to cooperate in idle position with drive gears (41). In a third step, the slider (53) protrudes (51 *) on an alignment lever (51) for abutment of the cardiac chambers to align the grooves (14 '') with the projections (15 '') of the rocker arm (15). The drive gears (41) are radially fixed.

The control device according to the invention can be used for controlling a motor for driving a roller blind, awning or the like.

DB 583468

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The numbers in brackets indicate international identification code, INID code Letters in clamps indicate international document code

8003159-4

The present invention relates to a control device for an electric gear motor for driving a roller bar for a roller shutter, awning or the like, which device has a plurality of cams which are arranged side by side on a shaft for free rotation thereon and which at their outer profile have was its track. All of the grooves are arranged to cooperate simultaneously with a control element for the motor switch, which element, under the influence of at least one resilient member, continuously strives to be pressed against the outer profile of the grooved chambers, the grooved chambers supporting associated gears. which are located side by side and coaxially with the chambers and arranged to cooperate with each other on a drive gear 15 arranged parallel to the shaft of the chambers to drive the chambers at different rotational speeds.

A device is arranged to align the grooves of the chambers with the control element of the switch as desired. This device has heart-shaped cams, each of which is connected to one of the side surfaces of a grooved cam and which are arranged to cooperate with an alignment element. A control element which is displaceable across the axis of the chambers is arranged to cooperate in a first step with a portion of the control element of the switch to disassemble this element and the profiles of the grooved chambers against the action of the elastic member. then, in a second step, to disassemble the shaft of the drive gears and the axis of the chambers while an elastic device aligns the gear of the drive gears with the respective gear gears, and in a third step to cause the heart-shaped chambers to cooperate with the alignment element.

In known devices of this kind, such as in the device shown diagrammatically in Fig. 1, the shaft 1 of the drive gear 2 is supported by a slide 3 which is displaceable in the direction of the arrow 4 towards the action of a spring 5 which

8003159-4 simultaneously strives to hold projections on the control element 6 of the switch 7 in contact with the periphery of the grooved chambers 9. Such a device has certain disadvantages. Since the drive gears 2 are radially displaceable, is the tear connection between the gear motor and these drive gears complicated, especially when the gear motor, such as i, is to be engaged?^: Ί devices for

X .. j of stop for a mar .... roil jellyfish or the like .. rolled-up position and rolled-up position. Furthermore, the spring 5 should be relatively strong, since the force exerted by the cogs for rotation of the cams 9 would otherwise be able to displace the gears in the direction of the arrow 4 and thus engage them, which would prevent proper rotational drive of the cams 9. This driving force 15 is particularly important at the moment when the cam 9 against the action of the spring 5 is to project the projection of the control element 6 of the switch 7 out of the grooves 8. Furthermore, due to the considerable tension of the spring 5, it is exerted to exert a considerable force in the arrow. 4 voluntarily directs the device in years 8 in line with the projections of current

i. «... element 6.

According to the present invention there is provided a control device which, in particular, does not have the disadvantages of the known devices. In this control device, the drive coupling between the gear motor and the drive gear (s) is simplified, since these gears do not need to be radially displaced at the moment when the device is operated voluntarily to align the grooves with the control element of the switch. This means that two similar rules: nails for controlling the stop of the engine in a position where a roller blind, awning or the like is rolled or unrolled, can be more easily connected to the engine. Likewise, as is the case with the device of the present invention, at least one of the drive gears can be driven by an internal toothed ring concentrically disposed within the tube of a tube-type gear motor. In this case

8003159-4, this drive gear engages at one side with the gear ring and at its other side with the gear connected to the first cam. Thus, it is impossible to displace this drive gear radially out of engagement with the gear ring.

Certain embodiments of the invention have the added advantage that the risk of the drive gears and corresponding gears being unduly disengaged during normal operation for an awning, roller blind or the like is much less than in known devices. The operation of aligning the grooves and the switching element can be performed easily and quickly by exerting a much more moderate force on the control element, which force can be easily exerted by hand or by means which allows remote control of the alignment of the grooves, for example by means of an electromagnet .

The control device according to the invention is characterized in that the shaft of the drive gears is radially fixed and that a movable support element, which has at least one part which is displaceable along a path across the axis of the drive gears, is arranged to support the shaft of the cams. A portion of the guide member is arranged to cooperate with the movable support members of the chambers to disassemble the shaft of the chambers and the shaft of the drive gears during the second operating step.

In one embodiment, the heart-shaped chambers are arranged to cooperate with an alignment element constituted by an appropriately formed fixed stop during the third operating step and at the moment when the chambers' axis and drive gears cease to disassemble.

In another embodiment, in which the alignment element is constituted by a lever which is pivotable about a axis parallel to the axis of the chambers and arranged to actuate by means of the control element in the direction of the heart-shaped chambers, the movable support element preferably supports, but not necessarily, the axis of alignment of the axis. In a variant of this embodiment, the movable support element is arranged not to interact with the control element directly but via the pivoting aligning lever thereon.

The invention will now be described in more detail with reference to the accompanying drawings.

Fig. 1 shows a known control device schematically.

Fig. 2 is a perspective view showing a first embodiment of the invention partially in section.

Fig. 3 is a sectional view along line III-III of Fig. 2, showing the first embodiment in normal operating position.

Fig. 4 is also a sectional view along line III-III of Fig. 2, showing the first embodiment at the end of an operation for aligning grooved cams.

Fig. 5 corresponds to Fig. 4 and shows a second embodiment of the invention.

Figure 6 corresponds to Figure 4, showing a third embodiment of the invention.

As shown in Figures 2-4, the control device is arranged in a tube-type gear motor. The device has two cams 11 and 12 which are arranged side by side on a shaft 13 to rotate freely thereon. Each cam 11, 12 outer profile has a single groove 14 *, 14¹'. These grooves 14 'and 14' 'are arranged to co-operate with the respective projections 15', 15 "of a control element for the switch 16 of the gear motor. has an extension 18 which is arranged to hold switch 16 in the open position when all projections 15 ', 15 "are simultaneously located in respective grooves 14', 14". Switch 16 is normally closed in released sleep mode. A spring 19, for example a torsion spring, strives to constantly hold the projections 15 ', 15' in contact with the profile of the chambers 11, 12.

The first grooved cam 11 has an associated gear 21, which is located side-by-side and coaxially with the first cam, which engages a drive gear 31 axially connected to a motor drive

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35, which engages an inner gear ring 36 arranged concentrically with the inner tube 75 of the gear motor. The drive gear 31 and the motor gear 35 are rotatable about one axis 38 parallel to the shafts 13 and 17. These three axes are in this example arranged parallel to the inner tube of the gear motor. 75th The cam 11 has, in this example at its circumference, a drive gear with in this example two cogs 39 which are arranged to cooperate for each rotation of the cam 11 with an intermediate gear 40 which is rotatably arranged on the shaft 38 and has eight gears therein. example. A gears 41 connected to the intermediate gear 40 laterally engage with a gear 22 which is connected to the second cam 12 and is located side by side and coaxially therewith.

An elastic device is provided to prevent rotation of the intermediate gear 40 and thus also of the gear 41, the gear 22 and the cam 12 when the two drive teeth 39 are not engaged with the gear 40. The elastic device is constituted by a spring blade 42 which continuously abuts portion 40 'of gear 40, which portion has only four teeth, one tooth of two being eliminated.

Each of two cardiac chambers 23 and 33 is connected to one of the side surfaces of a grooved cam 11 and 12. The axis 13 of the chambers 11, 12 and 23, 33 is radially movable and supported at each end by first end portions 45 'and 45'. 'of a movable support member constituted by a cam actuated double lever 45, the first end portions of which opposite end portions are pivotally mounted about an axis 47. Thus, this double lever 45, as well as the cams and gears supported therefrom, are slidable along a path 48-49 across the axis 38 of gears 31, 35. The projections 15 ', 15' 'of the rocker arm 15 continuously strive to abut in the direction of arrow 48 against the grooved chambers 11. 12 outer profile at a point which in this example is preferably located diametrically opposite the point of engagement between the gears 21 and 22 and the corresponding gears 31 and 41, respectively. Thus, these projections 15 ', 15' 'continuously tend to hold the gear 21

8003159-4 and 22 respectively, respectively, with corresponding gears 31 and 41 respectively.

The double lever 45 carries the two ends of a shaft 50 on which is pivotally mounted an alignment member, which is a double lever 51, both of which projections 51 ', 51' 'are arranged to cooperate with the cardiac cam 23 and 33, respectively, and are pressed continuously. away from it, in this example by a spring 52.

In this example, a control element arranged to actuate the rocker arm 15, the actuated double lever 45 and the alignment lever 51 is formed by a slide 53 arranged to slide in a guide 54. A spring 55 continuously strives to hold the slide 53 in one. the direction of arrow 65 (Fig. 3) reverses the resting position. The slide 53 carries a first ramp 57 and this extending first support surface 58, which are arranged to cooperate with an extension 59 on the rocker arm 15, and a second ramp 60 and a this extension second support surface 61, which are arranged to cooperate with an extension 62 finally, the slider 53 carries a stop 63 which is arranged to cooperate with an extension 64 of the alignment lever 51.

A return mechanism is provided to actuate the control element from one end of the gear motor. The return mechanism consists of a pivotally mounted bar 67 which is arranged parallel to the shafts 17 and. 47 and carries a first lever 68, the end of which is arranged to cooperate with a support surface 66 on the slide 53, and a second lever 69, which is arranged in the vicinity of one end of the gear motor 70. The second lever 69 is actuated by pressure in the direction of arrow 71 across the motor by means of, in this example, a sliding pressure means 72.

The shaft 38, shaft 47, shaft 17 and rod 67 are supported at one end of a torque housing 73 supporting the thrust member 72, and at its other end in a plate 74 supported by the inner tube 75 of the motor, which is likewise torque resistant. . The edge of a recess 76 in the plate

8003159-4 forms abutments for the end of shaft 13 to limit the angular displacement of double lever 45 in the direction of arrow 49.

It can be seen from the above that it is that of the roller bar tube 37 which is connected to the motor shaft not shown in the drawings, the rotation of the gear ring 36 which causes rotation of the gears 35 and 31 and thus rotation at a constant, relatively high speed of the grooved cam 11 For each rotation of the cam 11, the two drive teeth 39 rotate the grooved cam 12, which thus rotates incrementally at a lower speed than the cam 11. Thus, for example, the cam 12 can be rotated a maximum of one revolution, while the cam 11 rotates about fifteen turns, each corresponding to about one revolution of the bar rod 37. The grooves 14 'and 14' 'of the chambers 11 and 12 are simultaneously aligned with the corresponding projections. 15 'and 15' ', respectively, of the rocker arm 15, the projections are inserted into the grooves and open the extension 18 of the rocker arm 15 to the normally closed switch 16. The power supply of the motor is interrupted and the rotation of the roller bar tube 37 is stopped.

It is very easy to control the stop position of the roller bar tube 37, in which the grooves 14 'and 14' 'should be positioned in line. In the sleep position before regulation, the various elements assume the position shown in Fig. 3. For example, when a roller shutter or the like is fully wound on its tube 37, it is sufficient to push the pressure means 72 in the direction of arrow 71, the rod 67 being rotated in the direction of arrow 77 and the slide 53 being displaced in the direction of arrow 56. The latter displacement occurs in three steps. In a first step, the ramp 57 presses the extension 59 in the direction of the arrow 56 against the action of the spring 19, the projections 15 'and 15' 'being moved from the profile of the chambers 11, 12 in the direction of the arrow 78 and the extension 18 continuing to release the switch 16 to the closed position. The support surface 58 further holds the extension 59 raised to keep the projections 15 ', 15' 'removed. In a second step, the ramp 60 presses the extension 62 in the direction of the arrow 56, the double lever 45

8003159-4 is pivoted and shaft 13 and the cams and gears supported by it are displaced in the direction of arrow 49. The gears 21, 22 are disengaged with the corresponding gears 31, 41, and the support surface 61 actuates the extension 62 to keep the cams and gears in a disengaged position. At the same time, the spring blade 42 prevents rotation of the gear 41 in that it continuously adjusts and positions the gear of the gear 41 with the gear of corresponding, opposite gear 22.

In a third step, the stop 63 presses the extension 64 in the direction of arrow 56 against the action of spring 52, the alignment lever 51 pivoting its projections 51 'and 51' 'in the direction of arrow 79, which projections interact with the respective heart-shaped cam 23, 33 profile. These heart shaped cams are preferably angularly arranged with respect to the grooves 14 ', 14' ', the projections providing rotation of the grooved cams until the grooves 14', 14 '¹are aligned and are substantially opposite the corresponding projections 15 ', 15' *. All elements then assume the position shown in Fig. 4.

The pressure means 72 can then be released, whereby the slide 53 under the action of the spring 55 can be returned in the direction of the arrow 65 and first release the aligning lever 51, the projections 51 ', 51' of which are formed from the heart-shaped chambers 23, 33. Thereafter, the double lever 45 is released, whereby the cams and gears under the action of spring 52 can be displaced in the direction of arrow 48, the gears 22 being easily brought into engagement with the gears of gears 41 as a result of position setting spring blade 42 and gears 30 gears.

Finally, the rocker arm 15 is released, its projections 15 'and 15 "under the action of the spring 19 being brought into abutment against the profile of the chambers 11, 12 in corresponding grooves 14', 14". The spring 19 and the projections 15 ', 15' thus strive to hold the gears 21, 22 in engagement with the respective gears 31, 41, since the projections abut in the direction of arrow 48 at a point located diametrically opposite the gears 21, 22 and corresponding gears. 31, 41

8003159-4 engagement point. The switch 16 is simultaneously held in the open position by the extension 18.

During awnings or similar operation, the projections 15 ', 15' are held¹ outside the grooves 14 ', 14¹'and the switch 16 is released in the open position, which allows motor rotation. Each time the projections fall into the respective tracks, the rotation of the engine is interrupted, with the roller blind or awning always taking the same reel position.

Generally, a second gear motor control device, not shown in the drawings, is used which is arranged after the first in the inner tube 75 to control the stop of the roller blind or awning in the roll-off position. The drive gears of this device are easily disposed on the shaft 38, whereby a drive gear of this second device may, for example, be connected to the shaft 38, which in turn is connected to the gears 35 and 31. A second thrust member 72 'permits arbitrary control of the alignment of the cam grooves having the second control device in the manner described for the first control device above.

In the second embodiment of the invention shown in Fig. 5, the extension 62 of the double lever 45 and the ramp 60 of the slide 53 and the supporting surface 61 are eliminated. All other elements are identical to the corresponding elements in the first embodiment described above.

In the alignment of the grooves 14 ', 14' *, when the projections 15 ', 15' 'have been separated from the chambers 11, 12 in the direction of the arrow 78, in this second embodiment, the only stop 63 presses against the extension 64, the projections lever 51 of the alignment lever 51, 51, the heart-shaped cams 23, 33 act in the direction of arrow 49 to disengage gears 21, 22 with gears 31, 41. As soon as these elements are disengaged, the projections 51 ', 51' 'provide a rotation of the cardiac chambers 23, 33 and alignment of the grooves 14', 14 '' (Fig. 5), as described above. This second embodiment otherwise functions in the same manner as the first embodiment described above.

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In the third embodiment shown in Fig. 6, the alignment lever 51 and its extension 64 and shaft 50 have been eliminated and replaced with a alignment element constituted by a fixed stop 80 designed to interact with the outer profile of the heart-shaped chambers 23, 33. The tension spring 52 has been replaced with a spring 52 ', one end of which is hooked to the double lever 45. The slide 53 has been replaced with a pivotable control element 68 ', which is the first lever 68, designed for this purpose. The control lever 68 'has an extension 57' arranged to cooperate with the extension 59 and an extension 60 'arranged to cooperate with the extension 62. All other elements are identical to the corresponding elements in the first embodiment described above.

In aligning the grooves 14 ', 14' ', the rotation of the rod 67 and the guide lever 68' in the direction of arrow 77 in a first step through the action of extension 57 causes a displacement of the projections 15 ', 15' 'in the direction of arrow 78 and in a second step through the action of the extension 60 'is a displacement of the cams and gears in the direction of arrow 49. As the heart-shaped chambers 23, 33 are suitably angularly arranged relative to the grooves, as soon as they come into contact with the fixed stop 80, they rotate the grooved chambers 11, 12 and align the grooves 14 ', 14 '', as shown in Figure 6. Otherwise, the third embodiment functions in the same manner as the first embodiment.

The device according to the invention can be used to control electric gear motors for driving roller shutters, awnings or the like.

8003159-4