EP1788179B1 - Actuator for a movable part - Google Patents

Description

The invention relates to an actuating device according to the preamble of claim 1 and to an actuating device according to the preamble of claim 2.

The movable member may be a shutter or a lever arm.

Such a first-mentioned actuator is known from US 3,713,472 A1 and such a second-mentioned actuator is of the US 2003/085589 A1 known. These documents disclose the features of the preambles of claim 1 and 2, respectively.

The object of the invention is to provide such an actuating device which is protected against damage when actuated by hand.

This object is achieved in that the attacks are when applied by the driver towards the end of Kulissenausnehmung against a certain spring force deflectable spring stops, wherein the determined spring force is greater in a normal motor drive than the biasing force by the driver in driving the driver or the gate component by the motor drive and wherein in a case of abuse, the spring stops are deflected by overcoming the specific spring force and deflection of the spring stops of the driver a switch a switching signal generating actuated or increased motor current is recognizable and by the switching signal or due to the increased motor current consumption the motor drive can be switched off or that in the drive train between the motor drive and the movable member, an overload clutch is arranged.

In these embodiments, after a motorized movement of the movable member in its open position, the driver or the link component is moved back to its original position by a motor. If now the movable member to be moved by hand from its open position to its normal position, the driver can move freely and without resistance in the sliding recess.

In a normal motor drive of the movable member is not compressing the spring stops by the driver. If in a misuse, a manual intervention on the movable member against the drive direction of the motor drive, the spring stop is deflected by overcoming the determined spring force and the switch is actuated, so that the motor drive is emergency shut off.

This protects the motor drive against damage.

Alternatively, however, an overload clutch such as e.g. a slip clutch be arranged in the drive train between the motor drive and the movable member.

Furthermore, from the reversible motor drive, the movable member by the driver or the sliding member from its open position to its normal position movable driven and zurückbewegbar by the switching device after an adjustment of the movable member in its basic position of the driver or the link component of the motor drive in the home position , as well as a largely resistance-free manual mobility of the movable member from its normal position is possible in its open position.

In a simple way, the switching device may comprise switching elements which detect reaching of the or the ends of the link recess by the driver.

The motor drive can be a linear drive or a rotary drive.

To force the driver or the link component is preferably driven by a gear from the motor drive.

The motor drive can be a pneumatic or hydraulic drive. Preferably, however, the motor drive is an electric motor.

The movable member may e.g. be held by a locking device in its open position.

Is the movable member kraftbeaufschlagbar by a spring in the direction of movement from the basic position into the open position, preferably the spring is a gas spring, not only holding the movable member in the open position but also a support of the motor drive when moving the movable component from the basic position to the open position. This is particularly advantageous if the movable component must be lifted during this movement.

The support by the gas spring can be done over the entire path of movement of the movable member or even only over part of the path of movement.

In this case, preferably, the movable member is or carries a flap for closing an opening.

This can be a flap on a motor vehicle or even a flap on a piece of furniture such. to be a closet.

In this case, the flap can be driven to move from a vertical basic position into a raised open position.

One possibility is that the movable member is movable linearly movable between the basic position and the open position and the sliding recess extends straight.

But it is also possible that the movable member is rotatably driven to rotate about an axis of rotation between the basic position and the open position and the sliding recess extends like a circle.

It leads to a compact construction when the slide recess is formed in a guide wheel or driving wheel which is rotatably mounted about an axis of rotation and which is rotatably drivable by the motor drive.

In this case, the movable member may be a lever arm.

To achieve a deviating from a pivoting movement characteristic, it is possible that the lever arm is a lever arm of a. Jointed transmission in particular a four-bar mechanism is.

The four-bar linkage may consist of the lever arm, a pivotable at one end about a second axis of rotation parallel to the axis of rotation and a coupling articulated at a distance to each other at the free ends of the lever arm and handlebar coupling, wherein the flap can be arranged fixed to the coupling ,

Figur 1

eine Seitenansicht einer Betätigungseinrichtung mit Viergelenkgetriebe in einer abgesenkten Grundstellung

Figur 2

eine vergrößerte Seitenansicht der Betätigungseinrichtung nach Figur 1

Figur 3

eine Seitenansicht einer Betätigungseinrichtung mit Viergelenkgetriebe in einer teilangehobenen Stellung

Figur 4

eine vergrößerte Seitenansicht der Betätigungseinrichtung nach Figur 3

Figur 5

eine Seitenansicht einer Betätigungseinrichtung mit Viergelenkgetriebe in einer Öffnungsstellung

Figur 6

eine vergrößerte Seitenansicht der Betätigungseinrichtung nach Figur 5

Figur 7

eine Seitenansicht einer Betätigungseinrichtung mit Viergelenkgetriebe in einer teilabgesenkten Stellung

Figur 8

eine vergrößerte Seitenansicht der Betätigungseinrichtung nach Figur 7

Figur 9

eine Seitenansicht eines Kulissenrades.

Embodiments of the invention are illustrated in the drawings and will be described in more detail below. Show it

FIG. 1

a side view of an actuator with four-bar linkage in a lowered basic position

FIG. 2

an enlarged side view of the actuator according to FIG. 1

FIG. 3

a side view of an actuator with four-bar linkage in a partially raised position

FIG. 4

an enlarged side view of the actuator according to FIG. 3

FIG. 5

a side view of an actuator with four-bar linkage in an open position

FIG. 6

an enlarged side view of the actuator according to FIG. 5

FIG. 7

a side view of an actuator with four-bar linkage in a partially lowered position

FIG. 8

an enlarged side view of the actuator according to FIG. 7

FIG. 9

a side view of a sliding wheel.

The actuator shown has a reversible electric motor 1, the drive shaft 2 is formed as a worm, of which a worm wheel 3 is rotatably driven.

The worm wheel 3 is the first wheel of a multiple-gear transmission 4, the last wheel is not belonging to the invention crank gear 5, which is rotatably mounted about a rotation axis 6.

Electric motor 1 and gear 4 are arranged in a housing 17.

To the rotation axis 6 is further pivotally mounted with its one end a lever arm 7 of a four-bar mechanism 8, which further comprises a link 9 which is pivotally mounted about a parallel at a distance approximately perpendicular to the axis of rotation 6 arranged second axis of rotation 10 with its one end ,

At the two free ends of lever arm 7 and link 9, a coupling 11 of the four-bar linkage is articulated in each case with one of its ends.

On the coupling 11 resting a flap 12 is fastened for closing at the opening of a cabinet, not shown.

The guide wheel 5 has a concentric with the axis of rotation 6 by about 180 ° extending, formed as a slot link groove 13 into which a fixedly arranged on the lever arm 7, extending parallel to the axis of rotation 6 extending cam-like carrier 14.

The ends of the sliding recess 5 form a first stop 15 and a second stop 16 for limiting the mobility of the driver 14 along the longitudinal extent of the sliding recess 13.

On a component of the housing 17, not shown, a first switch 18 is arranged, which is operable when the driver 14 is in contact with the first stop 15.

On the component of the housing 17, not shown, a second switch 19 is further arranged, which is operable when the driver 14 is in abutment with the second stop 16.

In the Figures 1 and 2 the basic position of the four-bar mechanism 8 is shown, in which the flap 12 is in its aligned lower position and closes an opening, not shown, of a cabinet.

The driver 14 is in its basic position and is located on the second stop 16 of the sliding recess 13.

The electric motor 1 is switched off.

Thus, the flap 12 could be manually raised and lowered again, wherein the driver 14 can move freely in the sliding recess 13.

Now, if the electric motor 1 is turned on, it drives via the gear 4, the guide wheel 5 in a clockwise rotation.

Since the driver 14 is already on the second stop 16 in abutment, he and with him the lever arm 7 is also taken in the clockwise direction about the rotation axis 6 pivoting from the guide wheel 5 to a partially raised partial opening position ( FIGS. 3 and 4 ).

A gas spring, not shown, acts on a component of the four-bar linkage 8 or the flap 12 in the opening direction and moves the flap 12 into its in FIG. 5 illustrated opening position.

At the same time, the electric motor 1 now drives the guide wheel 5 in the counterclockwise direction with the direction of rotation reversed until the driver 14 comes into abutment against the first stop 15 and the guide wheel 5 is again in its basic position ( FIGS. 5 and 6 ).

Now, a manual lowering and lifting the flap 12 could take place, wherein the driver 14 moves freely in the sliding recess 13.

For motor closing, the electric motor 1 is switched on, which drives the guide wheel 5 in the counterclockwise direction, so that the first stop 15, the driver 14 and the four-bar linkage 8 counterclockwise entrains ( FIGS. 7 and 8 ).

If a certain angle is passed over in the closing direction, the flap 12 closes automatically due to its own weight against the force of the gas spring.

By the electric motor 1, the guide wheel 5 is then moved back to its basic position, as in the Figures 1 and 2 is shown.

In FIG. 9 is a guide wheel 5 'is shown, in which in the ends of the sliding recess 13', a first spring stop 20 and a second spring stop 21 are arranged.

These spring stops 20 and 21 are compressible when a certain application force is exceeded by the driver 14, whereby a switch signal is generated by switches, not shown, which leads to a shutdown of the electric motor 1. Alternatively, such a shutdown of the engine also take place in that an increased motor current consumption is detected. However, this occurs only at an increased variable resistance, as it e.g. is given when intervened by hand in the motor actuating movement of the flap 12.

In a normal motor actuator, there is no compression of the spring stops 20 and 21 and no triggering of a switching signal.

LIST OF REFERENCE NUMBERS

1 electric motor 12 flap 2 drive shaft 13 Kulissenausnehmung 3 worm 13 ' Kulissenausnehmung 4 transmission 14 takeaway 5 bull gear 15 first stop 5 ' bull gear 16 second stop 6 axis of rotation 17 casing 7 lever arm 18 first switch 8th Four-bar linkage 19 second switch 9 handlebars 20 first spring stop 10 second axis of rotation 21 second spring stop 11 paddock

Claims (17)

1. Actuator having a housing (17) and having a movable part and a motorized drive by which the movable part (7) can be driven so as to be movable from a basic position into an open position, and vice versa, having a freewheel by which the movable part can be decoupled, in its open position and basic position, from the motorized drive, wherein a slotted link part (5) can be driven so as to be movable by the reversible motorized drive and has a slotted link recess (13') which extends along the movement path of the movable part (7) and into which a driver (14) which is arranged on the movable part (7) and can be moved between a basic position and an open position or partially open position engages, wherein the slotted link recess (13') has at least a length which corresponds to the movement path of the driver (14) between its basic position and its open position or partially open position, and with a switching device by which, after adjustment driving of the movable part into its open position or basic position, the slotted link part can be moved back into a basic position of the slotted link part by the motorized drive, wherein both ends of the slotted link recess (13, 13') form stops (20, 21) against which the driver (14) can be brought to bear, and by moving the slotted link part (5) the movable part (7) can be driven so as to be movable, characterized in that the stops are spring stops (20, 21) which can be deflected counter to a specific spring force when acted on by the driver (14) at the end of the slotted link recess (13'), wherein the specific spring force is larger in the case of a normal motorized drive than the action force applied by the driver (14) when the slotted link part is driven by the motorized drive, and wherein in a case of misuse the spring stops (20, 21) can be deflected by overcoming the specific spring force, and when the spring stops (20, 21) are deflected a switch can be actuated by the driver (14) so as to generate a switching signal or an increased motor power consumption can be detected, and the motorized drive can be switched off by the switching signal or on the basis of the increased motor power consumption, or in that an overload coupling is arranged in the drive train, between the motorized drive and the movable part.
2. Actuator having a housing (17) and having a movable part and a motorized drive by which the movable part can be driven so as to be movable from a basic position into an open position, and vice versa, having a freewheel by which the movable part can be decoupled, in its open position and basic position, from the motorized drive, wherein a driver (14) can be driven so as to be movable by the reversible motorized drive between a basic position and an open position or a partially open position and engages in a slotted link recess (13') which is formed in the movable part and extends along the movement path of the movable part, wherein the slotted link recess (13') has at least a length which corresponds to the movement path of the driver (14) between its basic position and its open position or partially open position, and with a switching device by which, after adjustment driving of the movable part into its open position or basic position, the driver (14) can be moved back into a basic position by the motorized drive, wherein both ends of the slotted link recess (13') form stops (20, 21) against which the driver (14) can be brought to bear, and by moving the driver (14) the movable part can be driven so as to be movable, characterized in that the stops (20, 21) are spring stops (20, 21) which can be deflected counter to a specific spring force when acted on by the driver (14) at the end of the slotted link recess (13'), wherein the specific spring force is larger in the case of a normal motorized drive than the action force applied by the driver (14) when the driver (14) is driven by the motorized drive, and wherein in a case of misuse the spring stops (20, 21) can be deflected by overcoming the specific spring force, and when the spring stops (20, 21) are deflected a switch can be actuated by the driver (14) so as to generate a switching signal or an increased motor power consumption can be detected, and the motorized drive can be switched off by the switching signal or on the basis of the increased motor power consumption, or in that an overload coupling is arranged in the drive train, between the motorized drive and the movable part.
3. Actuator according to one of the preceding claims, characterized in that the switching device has switching elements which detect the driver reaching the end or ends of the slotted link recess (13, 13').
4. Actuator according to one of the preceding claims, characterized in that the motorized drive is a linear drive or a rotary drive.
5. Actuator according to one of the preceding claims, characterized in that the drive or the slotted link part can be driven by the motorized drive via a transmission (4).
6. Actuator according to one of the preceding claims, characterized in that the motorized drive is an electric motor (1).
7. Actuator according to one of the preceding claims, characterized in that a spring can apply force to the movable part in the direction of movement from the basic position into the open position.
8. Actuator according to Claim 7, characterized in that a gas spring can apply force to the movable part in the direction of movement towards the open position.
9. Actuator according to one of the preceding claims, characterized in that the movable part is or has a flap (12) for closing an opening.
10. Actuator according to Claim 9, characterized in that the flap (12) can be driven so as to be movable from a perpendicular basic position to a raised open position.
11. Actuator according to one of the preceding claims, characterized in that the movable part can be driven so as to be movable linearly between the basic position and the open position, and the slotted link recess extends in a straight fashion.
12. Actuator according to one of Claims 1 to 10, characterized in that the movable part can be driven rotationally about a rotational axis (6) so as to be rotatable between the basic position and the open position, and the slotted link recess (13, 13') extends in the manner of a circular segment.
13. Actuator according to Claim 12, characterized in that the slotted link recess (13, 13') is embodied in a cam wheel (5, 5') or driver wheel which is mounted to be rotatable about the rotational axis (6) and which can be driven so as to be rotatable by the motorized drive.
14. Actuator according to one of Claims 12 and 13, characterized in that the movable part is a lever arm (7).
15. Actuator according to Claim 14, characterized in that the lever arm is a lever arm (7) of a linkage mechanism, in particular of a 4-bar mechanism (8).
16. Actuator according to Claim 15, characterized in that the 4-bar mechanism (8) is composed of the lever arm (7), a guide arm (9) which can pivot with one end about a second rotational axis (10) which is parallel to the rotational axis (6), and a coupler (11) which is coupled in an articulated fashion to the free ends of the lever arm (7) and guide arm (9), with spacing between said coupler (11) and said free ends.
17. Actuator according to Claim 16, characterized in that the flap (12) is securely arranged on the coupler (11).

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