DE10318674A1 - Operating unit for a component which is movable on base part against spring tension, comprises a coupling which has a drive clutch wheel rotatable about a rotation axis - Google Patents

Abstract

The operating unit comprises a coupling which has a drive clutch wheel (12) rotatable about a rotation axis (5). The drive clutch wheel is driven by a drive motor in the rotation direction (6). The drive clutch wheel can be connected to a driver clutch wheel (21) of the rope drum (27) in order to rotate this about the rotation axis (5).

Description

The Invention relates to an actuator for a a base part movable against a spring force Component, with a drive motor for driving the movable component, through the while of the drive over a clutch rotates a cable drum against a torsional spring force can be driven and a rope can be wound onto the rope drum, the one end with the cable drum and the other end with the movable Component is connected.

at such an actuator it is known by an electromotive switchable clutch Drive connection from a drive motor via a gear stage to one Manufacture rope drum. Such an electromotive switchable Coupling is complex and expensive and prone to defects.

task The invention is therefore an actuator of the beginning to create the type mentioned, which is simple and inexpensive is and a high level of Defektunauffälligkeit having.

This The object of the invention solved, that the Coupling has a drive clutch wheel that is about an axis of rotation rotatably mounted and by the drive motor in one direction of rotation is rotatably drivable, the drive clutch wheel by a Drive in this one direction of rotation in a drive clutch wheel the cable drum can be coupled to drive this rotating about the axis of rotation is.

By this training does not require a special drive for the clutch, because the rotary drive of the drive clutch wheel, through which the The cable drum is driven in rotation, and at the same time an automatic coupling connection of the drive clutch wheel to the rope drum.

In simple mechanical design with high functional reliability can the drive clutch wheel from one of the driver clutch wheel uncoupled decoupling position axially against a spring force in an engagement position connecting to the driver clutch wheel be movably drivable, the one acting on the drive clutch wheel Spring force for it ensures that the Clutch always open is when the movable component is not driven.

To can the drive clutch wheel in a simple and space-saving manner from a compression spring, in particular from a prestressed helical compression spring be spring loaded in the uncoupling direction.

To a slip-free and also transferring higher forces The drive is preferably a positive coupling, in the particular drive clutch wheel and drive clutch wheel have axially facing spur gears in the Interengage clutch position.

A Training very simple structure and great reliability achieved in that the Drive clutch wheel freely rotatable by a certain angle of rotation and coaxial to one of the drive motors in one direction of rotation rotatably drivable drive wheel is arranged, drive clutch wheel and drive wheel over one or more extending approximately concentrically to the axis of rotation Ramps supported against each other are formed axially increasing against the one direction of rotation are.

there there is a small size if the drive wheel is approximately pot-shaped and on its bottom area has the ramps on which the axially into the pot opening of the Drive wheel protruding drive clutch wheel assigned above each ramp support elements axially supported is, the support elements support pins protruding radially from the drive clutch wheel could be.

to simple limitation of the rotary movement of the drive clutch wheel on the for the drive clutch wheel through attacks limited freely rotatable to the drive wheel by the specified angle of rotation be arranged.

are the attacks on the drive wheel projecting radially in its cup openings in the plane the support elements arranged and the support elements at Rotation of the drive wheel in one direction of rotation can be stopped at the stops, so have the support elements the double function for lifting the drive clutch wheel and its rotation angle limitation.

The Drive wheel is preferably a drive gear and over a Gearbox from the drive motor, in particular from a DC motor rotatably drivable.

In order to avoid destruction of the components of the actuating device when a force acting counter to the closing direction acts on the actuating device, there can be between the drive clutch wheel and the driving clutch tion wheel an overload protection device can be arranged, by which when a certain adjusting force is exceeded to move the movable part, the drive clutch wheel and the drive clutch wheel can be separated from one another.

To can in a simple manner, the drive clutch wheel axially from one Spring force against one or more rotatably with the rope drum connected ramps extending concentrically to the axis of rotation apply and by twisting in one direction non-rotatable cable drum can be moved in the direction of engagement. The certain adjusting force results from the spring force. If the rope drum is blocked by the rotary drive of the drive clutch wheel also rotated the drive wheel. Here but the rope drum is blocked, the drive wheel on the ramps slidingly against the spring force out of engagement with the drive clutch wheel lifted.

In the driver clutch wheel on a simple training pivotally connected to the cable drum freely rotatable and be axially displaceable and by a compression spring in the coupling closing direction axially against the flange connected to the cable drum in a rotationally fixed manner arranged ramps may be applied.

has the clutch wheel one or more concentrically forming the ramps Trapezoidal to the axis of rotation, axially directed to the flange tapering approaches on and is the flange with the approaches corresponding and in the same Trapezoidal recesses arranged concentrically to the axis of rotation is formed, so when approaches are snapped into the recesses at the same time a specific assignment of the driver clutch wheel to the cable drum ensured. If there is no force blocking the cable drum, the lugs snapped into the recesses form one positive Slewing ring between drive clutch wheel and drive clutch wheel.

In space-saving manner, the compression spring can be a disc spring or a plate spring package.

is the movably drivable component of larger dimensions, it is from Advantage if two ropes can be wound on the rope drum one end with the rope drum and the other End is connected to the movable member.

Around even then apply the same force on both sides make sure if there are different over time Elongations of the Ropes comes, can the ends of the two ropes over a rope length compensation device be connected to the cable drum.

To leads to a simple structure it when the rope length compensation device two compensating members extending approximately radially to the axis of rotation has as the pivot axes parallel to the axis of rotation freely pivotable two-armed levers are formed and on their radially outer ends one end of each rope is attached and its radially inner ends freely pivotable with each other by a certain swivel angle are connected.

To can the radially inner end of a compensating member claw-like be formed and the cone-shaped radially inner End of the other compensating member a relatively free pivotability of the two compensating members allowing a certain swivel angle embrace.

Preferably the compensating members extend approximately diametrically to the axis of rotation.

Around to avoid a obstacle in the path of movement of the movable component pinched and damaged is a closing movement by an obstacle detection of the movable component obstructing resistance detectable and a corresponding resistance signal can be supplied to electronics, through which the drive of the drive motor in one direction of rotation is sustainable.

On such an obstacle Body Parts a person, especially a child.

Around to immediately release such a jammed obstacle can, can by the electronics when receiving a resistance signal of the drive motor rotating by a certain angle of rotation against the one direction of rotation be switchable.

Thereby the clutch can come loose and the movable component by the spring force acting on it be moved in the opposite direction.

For this purpose, the obstacle detection can have a rotational position sensor, in particular a potentiometer, which detects the respective rotational position of the cable drum, by means of which a corresponding rotational position signal can be generated and fed to the electronics, and in the electronics the running time actually required to reach the respective rotating position with a specific predetermined running time to reach the respective one Rotational position is comparable, with a resistance signal when the specified transit time is exceeded by the actual transit time can be generated.

He follows a movement of the movable component not by the drive motor but by manual application of force, it is advantageous if the cable drum counteracts the torsional spring force of a torsion spring rotatably driven by the drive motor and so the rope on the Rope drum can be wound up.

To the torsion spring can be a leg spring in a space-saving design be stationary with one end and in with their other end a radial distance from the axis of rotation on the cable drum is.

A guide of the rope or the ropes can be achieved in that the rope or the ropes in the sheath or the covers a Bowden cable or a Bowden cable movable soul or are souls.

Especially the actuator is advantageously applicable if that The base part is a fixed body part and the movably drivable component is a movable flap or a sliding door of a motor vehicle.

space-saving it is when the drive motor, clutch and cable drum are one Form a unit that e.g. under the hat shelf in a motor vehicle can be built in ..

A further space-saving integration can be achieved that the Unit the overload protection device and / or the rope length compensation device and / or the obstacle detection.

The Spring force against which the movable component of the drive motor Is movably driven, the spring force of a gas spring or a helical compression spring.

On embodiment The invention is illustrated in the drawing and is described below described in more detail. Show it

1 an exploded view of an actuator

2 a side view of the actuator 1

3 a plan view of the actuator 1

4 a sectional view of the actuator along the line IV - IV in 2

5 a sectional view of the actuator along the line V - V in 2 ,

The Actuator shown serves to close one by z. B. a gas spring or a coil spring openable Tailgate of a motor vehicle.

From a motor pinion 2 a reversible DC motor 1 is via an idler gear 3 a drive gear 4 about an axis of rotation 5 in a first direction of rotation 6 rotatably drivable.

The drive gear 4 is in a lower part of the housing 7 on a bearing sleeve 11 rotatably mounted and approximately pot-shaped. At the bottom of the pot opening 8th of the drive gear 4 are distributed evenly along the circumference of the pot four concentrically to the axis of rotation 5 circumferential ramps 9 arranged opposite to the direction of rotation 6 rise axially.

At the transitions from one ramp to the other 9 has the drive gear 4 radially into the pot opening 8th protruding stops 10 ,

In the pot opening 8th protruding is an annular drive clutch wheel 12 around the axis of rotation 5 rotatably and axially displaceably arranged, the four radially protruding support pins evenly distributed on the circumference 13 possesses the radial in the area of the stops 10 and the ramps 9 protrude and over which the drive clutch wheel 12 axially on the ramps 9 rests.

On radially inside the drive clutch wheel 12 protruding support pin 14 there is a slide ring 15 on that of a helical compression spring 16 is pressurized and the drive clutch wheel 12 with its support pins 13 against the ramps 9 applied.

Through the attacks 10 limited to which the support pins 12 can come to a stop, the drive clutch wheel 12 by about 90 ° relative to the drive gear 4 twist.

In the bearing sleeve 11 protrudes a cone 18 , which has a radially extending bearing flange at its upper end 19 owns the helical compression spring 16 is axially supported. The cone 18 is freely rotatable but secured against axial displacement in the bearing sleeve 11 arranged.

The bearing flange 19 has a concentric bearing ring on its top 20 , on which an annular drive clutch wheel 21 is both rotatable and axially displaceable. The drive clutch wheel 21 owns the drive clutch wheel on it 12 axially facing end face an end toothing 23 which in a corresponding spur gear facing her 22 of the drive clutch wheel 12 is intervenable.

Through a disc spring package 24 is the drive clutch wheel 21 for contact with the bearing flange 19 towards the drive clutch wheel 12 spring loaded and protrudes with the bearing flange 19 facing side axially protruding tapered approaches 25 in corresponding trapezoidal recesses 26 in the bearing flange 19 , so that a positive, rotationally fixed connection is formed between these two parts.

The disc spring package 24 is with its the drive clutch wheel 12 opposite side axially on the end face of a cable drum 27 supported by means of a centering screw 28 coaxial with the bearing flange 19 is connected, the drive clutch wheel 21 and the rope drum 27 with the bearing flange 19 relative to each other about the axis of rotation 5 are rotatably connected. The inclined sides of the trapezoidal extensions, which are directed in the circumferential direction, slide through such a relative rotation 25 ramp-like on the corresponding oblique sides of the trapezoidal recesses 26 along and lift against the preloaded spring force of the disc spring assembly 24 the approaches 25 from the recesses 26 , so that the positive rotational connection between the drive clutch wheel 21 and the bearing flange 19 is solved.

The rope drum 27 is from a torsion spring designed as a leg spring 20 enclosed with one end at a radial distance from the axis of rotation 5 on the rope drum 27 and with its other end the rope drum on one 27 enclosing housing upper part 17 is arranged. By rotating the rope drum 27 in the first direction of rotation 6 becomes the torsion spring 29 relaxed. On the driving clutch wheel 21 facing end of the rope drum 27 are diametrically opposite two arcuate winding elements 30 arranged, gaps between their facing ends 31 are released. In the gaps 31 protrude the radially outer ends 32 of compensating members designed as two-armed levers 33 and 34 a rope length compensation device 35 , The compensating links 33 and 34 are around to the axis of rotation 5 parallel swivel axes 36 and 37 freely swiveling, which corresponds to the gaps 31 diametrically opposite to the axis of rotation 5 are arranged.

At the outer ends 32 the compensating links 33 and 34 are each one end of the souls 38 of Bowden cables 39 attached by sleeves firmly supported at their ends 40 led to hinges of the tailgate, not shown, and fastened there with their other ends at a radial distance from the pivot axis of the tailgate.

The radially inner end 41 of the compensating link 33 is claw-like and engages around the peg-like inner end of the compensating member 34 such that a relative free pivotability of the two is usually approximately diametrically to the pivot axis 5 extending compensating members 33 and 34 enables a swivel angle of approximately 15 ° in each swivel direction. In addition, the side flanks of the pin-like end strike 42 on the side flanks of the claw-like end 41 on.

By rotating the rope drum 27 in the direction of rotation 6 become the souls 38 the Bowden cables 39 on winding elements 30 wound. Over time, the souls become unevenly elongated 38 come, at the beginning of such a winding process to close the tailgate, first on the longer soul 38 pulled until both souls 38 sets the same traction and furthermore a symmetrical pull on the souls 38 he follows. This takes place through a relative pivoting of the compensating members 33 and 34 a balance between the different lengths of the souls 38 and thus even tension on the hinges of the tailgate. This can thus be inserted symmetrically into a lock at the end of its closing movement.

With the lower end of the tenon 18 is a pinion 43 non-rotatably connected in a sensor wheel 44 a rotary position sensor designed as a potentiometer 45 engages and this when the rope drum rotates 27 drives rotatable. According to the rotating position of the rope drum 27 generated by the rotational position sensor 45 a rotational position signal and passes this to electronics 46 to. In electronics 46 this actual rotational position signal is compared with a target rotational position signal, which is generated by the DC motor after a certain running time of the rotary drive 1 from the rope drum 27 should have been achieved. Is after the certain running time of the DC motor 1 the target rotational position has not yet been reached, because this is prevented by an obstacle, by the electronics 46 so that the obstacle is recognized and a resistance signal is generated as well as the DC motor 1 supplied to turn it off and then reverse drive to a certain angle to release the obstacle.

The actuator works like follows.

By turning on the DC motor 1 this drives the drive gear 4 that is initially opposite the drive clutch wheel 12 in the direction of rotation 6 twisted. By loading the helical compression spring 16 is the drive clutch wheel 12 in its deepest in the drive gear 4 immersed position. By the rotation of the drive gear 12 slide the support pins 13 of the drive clutch wheel 12 on the ramps 9 of the drive gear 4 along so that the drive clutch wheel 12 against the action of the helical compression spring 16 axially from the drive gear 4 is lifted out and with its front teeth 22 in the spur gear 23 of the clutch wheel 21 engaged.

Once the support pins 13 the attacks 10 have been reached by the rotary motion of the drive gear 4 the drive clutch wheel 12 rotatably carried, which in turn the drive clutch wheel 12 and with this the rope drum 27 takes it away while turning. This wraps the souls 38 on the winding elements 30 and thus moves the tailgate from its open position to its closed position.

If a high force acting against the closing direction acts on the system, an overload protection takes effect before the components can be destroyed. Here, the rope drum 27 can be separated from the drive in a short time. In this overload case, the rope drum rotates relative 27 with the bearing flange 19 to that of the DC motor 1 via the drive gear 4 and the drive clutch wheel 12 driven clutch wheel 21 , the approaches 25 against the spring force of the disc spring assembly 24 from the recesses 26 move out like a ramp and the positive connection is released. The DC motor 1 continues to drive for a certain time and is then stopped by the electronics and reversed by a certain angle of rotation in order to then be switched off completely.

The tailgate can also be closed manually. In such a manual closing process, there is between the cable drum 27 and the DC motor 1 no connection because the spur gears 22 and 23 of drive clutch wheel 12 and drive clutch wheel 21 are disengaged from each other. This means that the system is not affected by a manual closing process. For the souls 38 thereby on the winding elements 30 the rope drum 27 the rope drum is wound up by the torsion spring 29 in the direction of rotation 6 rotated driven. The torsion spring 29 replaces a drive with a DC motor 1 regarding the winding process.

1

DC motor

2

pinion

3

idler

4

drive gear

5

axis of rotation

6

first direction of rotation

7

Housing bottom

8th

cup opening

9

ramps

10

attacks

11

bearing sleeve

12

drive gear wheel

13

supporting pins

14

support pin

15

sliding ring

16

Helical compression spring

17

Housing top

18

spigot

19

Lagerflansch

20

bearing ring

21

Mitnehmerkupplungsrad

22

spur gearing

23

spur gearing

24

Belleville spring assembly

25

approaches

26

recesses

27

cable drum

28

centering

29

torsion spring

30

winding members

31

Gaps

32

outer ends

33

balancing member

34

balancing member

35

Cable length compensation device

36

swivel axis

37

swivel axis

38

souls

39

cables

40

wrap

41

claw-like The End

42

pin-like The End

43

pinion

44

sensor wheel

45

Rotary position sensor

46

electronics

Claims (31)

Actuating device for a component that can be driven against a spring force on a base part, with a drive motor for driving the movable component, by means of which a cable drum can be rotatably driven against a torsion spring force via a clutch during the drive and a cable, one of which can be wound onto the cable drum End is connected to the cable drum and the other end to the movable component, characterized in that the coupling is a drive coupling wheel ( 12 ) that has an axis of rotation ( 5 ) rotatably mounted and by the drive motor in one direction of rotation ( 6 ) is rotatably drivable, the drive clutch wheel ( 12 ) by a drive in this one direction of rotation ( 6 ) in a driver clutch wheel ( 21 ) the rope drum ( 27 ) around the axis of rotation ( 5 ) can be coupled in a rotating driving manner. Actuating device according to claim 1, characterized in that the drive clutch wheel ( 12 ) from one of the driver clutch wheel ( 21 ) uncoupled decoupling position against a spring force axially into a with the driver clutch wheel ( 21 ) connecting coupling position is movably drivable. Actuating device according to claim 2, characterized in that the drive clutch wheel ( 12 ) from a compression spring, in particular from a prestressed helical compression spring ( 16 ) is spring loaded in the decoupling direction. actuator according to claim 2, characterized in that the coupling is a positive coupling is. Actuating device according to claim 4, characterized in that the drive clutch wheel ( 12 ) and drive clutch wheel ( 21 ) axially facing spur gears ( 22 . 23 ) which engage in one another in the engagement position. Actuating device according to one of claims 2 to 5, characterized in that the drive clutch wheel ( 12 ) freely rotatable by a certain angle of rotation coaxial to one of the drive motors in one direction of rotation ( 6 ) rotatably drivable drive wheel is arranged, drive clutch wheel ( 12 ) and drive wheel via one or more concentric to the axis of rotation ( 5 ) extending ramps ( 9 ) are supported against each other, which are opposite to the one direction of rotation ( 6 ) are designed to increase axially. Actuating device according to claim 6, characterized in that the drive wheel is approximately pot-shaped and the ramps ( 9 ) at which the axially into the pot opening ( 8th ) of the drive wheel projecting drive clutch wheel ( 12 ) over each ramp ( 9 ) associated support elements is axially supported. Actuating device according to claim 7, characterized in that the support elements radially from the drive clutch wheel ( 12 protruding support pins ( 13 ) are. Actuating device according to one of claims 6 to 8, characterized in that the drive clutch wheel ( 12 ) through stops ( 10 ) is freely rotatable to the drive wheel. Actuating device according to claim 9, characterized in that the stops ( 10 ) on the drive wheel radially in its cup opening ( 8th ) projecting in the plane of the support elements and the support elements when the drive wheel rotates in one direction of rotation ( 6 ) at the stops ( 10 ) can be struck. Actuating device according to one of the preceding claims, characterized in that the drive wheel is a drive gear ( 4 ) and via a gearbox ( 2 . 3 ) from the drive motor, in particular from a direct current motor ( 1 ) can be rotatably driven. Actuating device according to one of the preceding claims, characterized in that between the drive clutch wheel ( 12 ) and the clutch wheel ( 21 ) an overload protection device is arranged, by means of which when a certain adjusting force is exceeded to move the movable part, the drive clutch wheel ( 12 ) and drive clutch wheel ( 21 ) are separable. Actuating device according to claim 12, characterized in that the driver clutch wheel ( 21 ) axially by a spring force against one or more rotatably with the cable drum ( 27 ) connected, concentric to the axis of rotation ( 5 ) applied to the extending ramps and by twisting in one direction of rotation ( 6 ) with non-rotatable rope drum ( 27 ) is movable in the direction of engagement. Actuating device according to claim 13, characterized in that the driver clutch wheel ( 21 ) on a rotationally fixed with the rope drum ( 27 ) connected pin (bearing ring 20 ) is freely rotatable and axially displaceable as well as axially by a compression spring in the coupling closing direction against the one against rotation with the cable drum ( 27 ) connected flange ( 19 ) arranged ramps is applied. Actuating device according to claim 14, characterized in that the driver clutch wheel ( 21 ) one or more concentric to the axis of rotation ( 5 ) arranged axially to the flange ( 19 ) directed trapezoidal tapered approaches ( 25 ) and the flange ( 19 ) with the approaches ( 25 ) corresponding and in the same way concentric to the axis of rotation ( 5 ) arranged trapezoidal recesses ( 26 ) is trained. Actuating device according to one of claims 14 and 15, characterized in that the compression spring is a plate spring or a plate spring assembly ( 24 ) is. Actuating device according to one of the preceding claims, characterized in that on the cable drum ( 27 ) two be le can be wound, one end of each with the rope drum ( 27 ) and the other end of which is connected to the movable component. Actuating device according to claim 17, characterized in that the ends of the two ropes via a rope length compensation device ( 35 ) with the rope drum ( 27 ) are connected. Actuating device according to claim 18, characterized in that the rope length compensation device ( 35 ) two approximately radial to the axis of rotation ( 5 ) extending compensating members ( 33 . 34 ), which as each around the axis of rotation ( 5 ) parallel swivel axes ( 36 . 37 ) freely pivotable two-armed levers are formed and at their radially outer ends ( 32 ) each end of a rope attached and the radially inner ends are pivotally connected to each other by a certain pivot angle. Actuating device according to claim 19, characterized in that the radially inner end ( 41 ) of one compensating link ( 33 ) is claw-like and the cone-like radially inner end ( 42 ) of the other compensating link ( 34 ) a relative free pivotability of the two compensating links ( 33 . 34 ) around a certain swivel angle. Actuating device according to one of claims 19 and 20, characterized in that the compensating members ( 33 . 34 ) approximately diametrically to the axis of rotation ( 5 ) extend. Actuating device according to one of the preceding claims, characterized in that an obstacle detection can detect a resistance which hinders a closing movement of the movable component and a corresponding resistance signal of an electronics ( 46 ) can be fed, through which the drive of the drive motor in one direction of rotation ( 6 ) is sustainable. Actuating device according to claim 22, characterized in that the electronics ( 46 ) when a resistance signal is received, the drive motor is rotated by a certain angle against one direction of rotation ( 6 ) can be rotated. Actuating device according to one of claims 22 and 23, characterized in that the obstacle detection determines the respective rotational position of the cable drum ( 27 ) detecting rotary position sensor ( 45 ), in particular has a potentiometer by means of which a corresponding rotational position signal can be generated and the electronics ( 46 ) feedable and in electronics ( 46 ) the running time actually required to reach the respective rotational position can be compared with a certain predetermined running time for reaching the respective rotating position, a resistance signal being able to be generated if the predetermined running time is exceeded by the actual running time. Actuating device according to one of the preceding claims, characterized in that the cable drum ( 27 ) against the torsional spring force of a torsion spring ( 29 ) can be rotatably driven by the drive motor. Actuating device according to claim 25, characterized in that the torsion spring ( 29 ) is a leg spring that is stationary with one end and with a radial end to the axis of rotation with its other end ( 5 ) on the rope drum ( 27 ) is arranged. Actuating device according to one of the preceding claims, characterized in that the rope or the ropes in the sheath or sheaths ( 40 ) a Bowden cable or Bowden cables ( 39 ) is movable soul or souls ( 38 ) are. actuator according to one of the preceding claims, characterized in that the base part a fixed body part and the movably drivable component is a movable flap or a sliding door of a motor vehicle. Actuating device according to one of the preceding claims, characterized in that the drive motor, clutch and cable drum ( 27 ) form a structural unit. Actuating device according to claim 29, characterized in that the structural unit, the overload protection device and / or the rope length compensation device ( 35 ) and / or the obstacle detection. actuator according to one of the preceding claims, characterized in that the movable Component against the spring force of a gas spring or a helical compression spring is movably driven by the drive motor.