WO2010012610A1

WO2010012610A1 - Shaft door drive, and door provided therewith

Info

Publication number: WO2010012610A1
Application number: PCT/EP2009/059208
Authority: WO
Inventors: Michael Sanke; Victor SCHÜTZ
Original assignee: Hörmann KG Antriebstechnik
Priority date: 2008-08-01
Filing date: 2009-07-17
Publication date: 2010-02-04
Also published as: JP2011530023A; DE202008010358U1

Abstract

The invention relates to a shaft door drive (14) for connecting to a door shaft (12) of a door (10) to be driven, said door shaft (12) being connected to a weight compensation device (20) and being operatively connected to a door leaf (18) to be driven, comprising a motor drive unit (50) and a shaft connection element (84, 86) for connecting the shaft door drive (14) to the door shaft (12), wherein the shaft connection element (84, 86) is connected by means of a positive transmission (94) to the motor drive unit (50). In order to avoid the risk of damage in the event of malfunctions and emergencies, the motor drive unit (50) comprises a motor (60) and a self-locking motor transmission (62). Furthermore, in order to effect a disengagement if a torque limit is exceeded, an overload clutch (79) for disengaging the shaft connection element (84, 86) from the motor drive unit (50) is provided.

Description

WELLENTORANTRIEB AND THUS GIVEN GATE

The invention relates to a Wellentorantrieb for connection to a connected to a counterbalance Torwelle a driven gate, which Torwelle is drivingly connected to a gate to be driven, with a motor drive unit and a shaft connection element for connecting the Wellentorantriebes to the Torwelle, wherein the shaft connection element by means of a positive transmission gear the motor drive unit is connected. Moreover, the invention relates to a door provided with such a door drive.

Wellentorantriebe for direct connection to Torwellen are widely known. In particular, such Wellentorantriebe are used as Industrietorantriebe for driving industrial doors, as is known for example from the company brochure "industrial sectional doors" the company. Hörmann KG with the imprint "S. 04.08 /D.04.08/HF 84857 / G.xx2".

Such Wellentorantriebe are relatively expensive, since a variety of requirements must be met. As drives for garage doors in the living area, they could not prevail because of the complex construction and the resulting high price.

A low price can be achieved in particular by selecting available as mass-produced motor drive units of suitable type. For this purpose, motor drive units which can be used in particular as windshield wiper motors in passenger cars are particularly suitable. Such motor drive units available on the market have, for example, cheap DC motors and already a reduction gear in the motor unit, which is generally designed as a self-locking gear (eg worm gear). This has the advantage in Torantrieben that even when the engine is stopped a holding function for the gate is reached. When the door is closed, this serves the burglary protection; when the door is open, a raised door leaf is held in its raised position even when the engine is not operating. To meet these purposes, it is also advantageous if the motor gear unit and the door shaft are positively connected to one another in a geared manner. This also has the effect of a clear assignment of a rotation angle of the engine to a specific door position, so that the position of the door on the door drive and in particular on the engine can be detected.

However, such training can be problematic in the event of accidents and emergencies.

The object of the invention is to provide a Wellentorantrieb of the aforementioned type which meets the aforementioned advantages, but is still inexpensive and durable and in which the risk of damage in malfunction and emergencies is avoided.

This object is achieved by a door drive with the features of the attached claim 1. Advantageous embodiments of the invention are the subject of the dependent claims. A door provided with the door drive is the subject of the additional claim.

According to the invention, a shaft gate drive of the aforementioned type is characterized in that the motor drive unit has a motor and a self-locking

Motor transmission and that an overload clutch for decoupling of the shaft connection element is provided by the motor drive unit.

In the solution according to the invention, on the one hand, a cost-effective motor unit available as a mass-produced product is provided, which can also fulfill a holding function at the same time. If an overload clutch is provided, it can also be used a positive gear, which this Motor drive unit positively connects with a door shaft which engages a counterbalance device.

Especially with weight compensation devices containing torsion springs or other spring elements, even with the most careful production and maintenance can not always be completely ruled out that it -. If the gate is used more frequently and material fatigue occurs, the spring will break.

Such cases can indeed be encountered by the prior art by a spring breakage. However, acts in the time between spring break and action of the spring breakage tremendous torque on the door shaft, which is transmitted in the formation of the door drive with self-locking motor drive unit and positive gear on all elements of the door drive and can lead to destruction of the door drive or its suspension. This is avoided by the overload clutch.

Advantageously, the overload clutch is designed as uncoupling, which can also be operated manually. Thus, in addition to the overload function and an emergency unlocking function can be achieved. It is a cost effective and compact design possible.

The coupling is preferably designed as an axial coupling. A coupling element of the same can move in the axial direction, in particular when a torque shock occurs as well as manually actuated, in order to disengage or engage the clutch. The automatic overload operation can be achieved very easily via sloping flanks on a projection-Rücksprung- training.

By complementary conical (eg circular or oval in cross-section) formed projections / recesses can be made faster and safer and more accurate even with the manual operation re-engagement. These conical surfaces advantageously act simultaneously as inclined flanks for disengaging the overload clutch in a strong torque shock. An embodiment of the invention will be explained in more detail with reference to the accompanying drawings. It shows:

1 is a schematic, partially sectioned side view of a gate with Torwelle and Wellentorantrieb,

Figure 2 is a view of a corner region of the door of Figure 1 seen from the interior of the space to be closed, wherein the connection of the Wellentorantriebes is shown to the door shaft.

3 is a perspective view of a basic structure of the

Wellentorantriebes with motor drive unit, output shaft and transmission gear between the output shaft and motor drive unit;

Fig. 4 is a front view of the base structure of Fig. 3;

Fig. 5 is a sectional view taken along the line A-A of Fig. 4 with a disengaged device in the engaged state;

Fig. 6 is an enlarged detail view of the detail C of Fig. 5;

Fig. 7 is a sectional view taken along the line B-B of Fig. 4 with the disengaging means in a disengaged condition under overload; and

8 is an enlarged detail view of the detail D of Fig. 7.

In Figs. 1 and 2, an automatically driven gate 10 with a door shaft 12 and designed as a Wellentorantrieb or direct drive door drive 14 is shown. The gate 10 has a movable in a guide 16 between a closing end position and an opening end position door leaf 18. The door shaft 12 is formed as part of a weight balancing device 20 and has a force storage device, here in the form of a torsion spring 22, which balances the weight of the door leaf 18 as far as possible during its movement. For this purpose, the door shaft 12 is coupled by means of a gate operation 21 geared to the door leaf 18 such that the door shaft 12 rotates when moving the door leaf 18. In the example shown, the gate gear 21 has cable drums 24 and wire ropes 26 that can be wound thereon.

Next, the door gear 21 on a fall protection 21a. The fall protection 21a has spring break safeguards 21b, which are arranged on the cable drums 24 and designed in such a way as described and shown in DE 19855697 A1, which is hereby incorporated by reference. Reference is made expressly to DE 19855697 A1 for further details.

The door operator 14 is connected to one end of the door shaft 12 for rotatably driving the same.

FIGS. 1 and 2 further show walls 28 of a building 30, which has a door opening 32 which can be closed by the door 10. The door drive 14 is produced in industrial mass production and is so adaptable in its manufacture that it can be adapted to different gates 10 and different buildings 30 with corresponding installation situations.

The door drive 14 has, as shown in FIG. 2, a drive housing 34. The drive housing 34 has a plurality of hoods or covers 36, 37. In the actual drive housing 34, the drive elements are mounted on a support structure or base structure 40.

FIGS. 3 to 8 show the door drive 14 without the covers 36 and 37, so that the drive elements and the base structure 40 can be seen. The base structure 40 has a first base structure part 42 and a second base structure part 44, which are detachably connected together at a fastening interface 46.

The first base structure part 42 is formed as a base plate or base plate 48. On the base plate 48, a motor drive unit 50, a drive shaft 64 of a transmission gear formed as a form-locking Zugmittelgetriebe 94 and a decoupling device 54 is attached.

The motor drive unit 50 is designed as a geared motor and has a motor housing 58, an electric motor 60 and a self-locking worm gear 62. As shown in FIGS. 5 to 8, the drive shaft 64 is connected to the output shaft 52 of the worm gear 62. On the drive shaft 64 is seated a first gear in the form of a first sprocket 66th

By means of the decoupling device 54, the first sprocket 66 of the worm gear 62 is decoupled, so that the first sprocket 66 can rotate freely in the decoupled state. For this purpose, the decoupling device 54 has a manually actuated by not shown actuating elements coupling pin 72, which is controlled by a cam 74, not shown, axially movable during rotation. This axial movement is transmitted via a coupling element acting as a lever 76 on a non-rotatably connected to the drive shaft 64 first coupling element 74, so that the first coupling element 74 is movable in the axial direction.

The first coupling element 74 is in engagement with the first gear of the transmission gear, ie in the embodiment with the first sprocket 66 of the traction mechanism 94, via a projection-recess formation 68 in engagement. The projection-recess formation 68 has a plurality of a radial distance from the rotation axis of the drive shaft 64th arranged projections - here in the form of pins 69 on the first coupling element 74 - and correspondingly formed for receiving the projections recesses - here in the form of receiving openings 70 in serving as a second coupling element of the decoupling device 54 first chain 66 - on.

By axial movement of the first coupling member 74, the projections and recesses of the projection-recess formation 68 can be disengaged. Accordingly, the decoupling device 54 is formed as an axial coupling.

The decoupler 54 includes a retainer 77 for maintaining the projection-rebound formation in normal operation. The holding device 77 is formed in the illustrated example as a biasing means for biasing the uncoupler 54 in its engaged state. For this purpose, a spring 78 is provided, which biases the displaceable on the drive shaft 64 in the axial direction of the first coupling element 74 in the direction of the first chain sprocket 66.

By means of a movement of the coupling claw 76 towards the motor drive unit 50, the first coupling element 74 can be manually moved axially against the bias by the spring 78 so as to pull the pins 69 out of the receiving openings 70. This happens, for example, for manually opening the door in emergency or incidents, such as a power failure. The first sprocket 66 can then rotate freely on the drive shaft 64. As a result, the blocking of the door shaft 12 is canceled by means of the self-locking gear de motor drive unit 50 and the door leaf 18 can be moved freely by turning the door shaft 12 and the gears of the transmission gear (traction mechanism 94).

When the coupling claw 79 is released, the first coupling element 74 is again biased by the spring 78 in the direction of the first chain sprocket 66. At the latest when the first coupling element 74 and the second Turning coupling element acting first sprocket 66 relatively further, the pins 69 reach a position where they are aligned with the receiving openings 70; and they snap back into the receiving openings, so that the axial clutch is engaged again.

The pins 69 and the receiving openings 70 have mutually complementary oblique, in particular conical, surfaces 69 a. In the embodiment, an outer peripheral surface 69a of the pins 69 is formed in a truncated cone shape. The inner surface 70a of the receiving openings 70 is formed with a correspondingly corresponding conical inclination.

This has essentially two special effects. On the one hand, the engagement process is facilitated by the conical design; the pins 69 are easier to insert into the receiving openings 70 and center themselves in it and are still recorded firmly and without play. On the other hand, but also the projection-recess formation 68 is formed with oblique edges in the circumferential direction with respect to the direction of rotation of the drive shaft 64. These oblique edges act in a sudden strong torque shock as wedges or inclined planes and push the first coupling element 74 against the bias of the spring 78 from engagement with the first sprocket 66th

A state after the automatic decoupling of the decoupling device 54 due to a strong torque shock is shown in Figs. 7 and 8.

Due to the design with oblique edges in the circumferential direction formed as an axial coupling Entkupplungseinrichtung 54 simultaneously forms an overload clutch 79, which is very advantageous in the gate 10 shown here with spring break 21b, as will be explained in more detail below with reference to FIGS. 1 and 2.

In a fraction of the torsion spring 22 at a raised position of the door leaf 18 threatens a crash of the door leaf. Therefore, the Spring break 21 b provided to protect the door leaf 18 from falling. However, if the door drive 14 is connected, the worm gear 62 in the motor drive unit 50 acts self-locking. However, this in terms of burglar protection or the like actually to be welcomed property causes in the event of a spring breakage of the torsion spring 22 a high load, since the then on the door shaft high torque is transmitted directly to the traction mechanism 94. Since this is designed as a positive gear, the entire load is transmitted to the motor drive unit 50.

Although the spring rupture protection 21b acts very quickly, the heavy torque impact that is applied until the onset of action on the door drive 14 could lead to destruction. This is avoided by forming the decoupling device 54 as overload clutch 79.

The torque threshold at which the overload clutch 79 triggers, can be influenced and adjusted by the design of the slope of the oblique flanks (here the conical surfaces 69a, 70a), by design of the spring 78 and / or by selection of materials and / or possibly lubricants ,

Although with respect to avoid overload, a purely non-positive or frictional transmission would be advantageous as a transmission gear, in the gate drive 14 proposed here, the entire transmission line is formed positively. In addition to advantages in burglary protection and safe power transmission, this has the further considerable advantage that a position of the door leaf 18 can be detected and detected reliably and unambiguously by means of rotational angle detection on the door drive 14 itself. This makes it possible, as is well known in the art, achieve an exact control of the automatically driven door movement.

For position detection, the door drive 14 has a position transmitter, not shown in detail, by means of a pinion form-fitting manner with a drive chain 96 of the chain drive as a traction mechanism 94th combs. Even with decoupling the pinion of the position encoder thus remains geared with an output shaft 80 of the traction mechanism 94 so that their angular position and thus the position of the connected door leaf 18 can always be determined. The position sensor is designed as an absolute value encoder, which supplies the absolute rotational angle position to a control of the door drive 14, not shown. Such absolute encoders are known and available in different versions on the market.

In an embodiment, not shown here, in which the position sensor is arranged on the motor drive unit, a decoupling sensor, which detects a uncoupling operation (be it manually, be it automatically overload) is provided, wherein the controller is designed such that upon receipt a signal of the Entkuppelsensors, which indicates a again after a disengaging operation again established coupling state, performs a reference run for the gate 10, in which the position, in particular the end positions of the door leaf 18 are taught.

In the preferred embodiment, with the position sensor provided in the drive train from the motor drive unit to the output shaft behind the decoupling device 54, the position transmitter always indicates the absolute position of the door leaf 18 after a first teach-in after commissioning, so that a reference travel after decoupling and, in principle, a decoupling sensor can be dispensed with is.

In the following, the further structure of the door drive is explained in more detail with reference to the representations of FIGS. 3 to 8.

The second base structure part 44 is likewise designed as a plate, which can be connected to the base plate 48 via the attachment interface 46. The second base structure part 44 has the output shaft 80 of the door drive H, which is rotatably mounted on a bearing 82 arranged at a certain radial distance from the drive shaft 64. The output shaft 80 has on one side as shaft connection element a shaft coupling 84 with a connection part 86, which can be placed on the end of the door shaft 12. A radial Inwardly facing projection 88 engages when placed on an existing on the door shaft 12 longitudinal groove 90 (Fig. 2), so that the connecting part 86 rotatably seated on the door shaft 12.

At the other end, the output shaft 80, a second gear, here in the form of a second sprocket 92, on. The two gear wheels on the drive shaft 64 and the output shaft 80 are positively connected via the traction mechanism 94 with each other form-fitting manner. The traction mechanism 94 has a drive chain 96 in the embodiment shown here.

For fixing the second base structure part 44, the first base structure part 42 has two openings 98, 99, the attachment interface 46 on the second base structure part 44 has openings 100, 101 provided with a corresponding spacing from the openings 98, 99. Screw fasteners 102 extend through these openings 98 to 101 in order to fasten the two base structure parts 42, 44 together.

Both the first and the second base structure part 42, 44 is provided with an angled, for example, bent edge region 104, 105. At the attachment interface 46, the two base structure parts 42, 44 engage with their angled edge regions 104, 105 telescopically. The openings on one of the two base structure parts 44, 42 are designed as elongated holes. In the example shown here, the openings 100, 101 on the second base structure part are designed as such elongated holes 106, 108. The elongated holes 106, 108 have a width which is smaller than the diameter of the circular openings on the other base structure part.

A door drive system for producing such a door drive 14 has a first base structure part 42, which can always be produced in industrial mass production, which already has all the corresponding drive elements - here, for example: motor drive unit 50, (not shown), electrical unit, decoupling device 54, uncoupling sensor 56, drive shaft 64 with first sprocket 66 - is provided and is preferably fully assembled. The Door drive system further comprises an assortment of different second base structure parts. The second base structure part 44 is thus designed as an exchangeable output module. For further details, reference is made to German Patent Application 10 2008 034 359.5 (not previously published), which forms part of the disclosure herein.

LIST OF REFERENCE NUMBERS

10 goal

12 Torwelle

14 door drive

15 door drive attachment

16 leadership

18 door leaf

20 weight compensation device

21 door operations

21a fall protection

21 b Spring breakage device

22 torsion spring

24 cable drum

26 wire ropes

28 wall

30 buildings

32 door opening

34 drive housing

36 cover

37 cover

40 basic structure

42 first base structure part

44 second basic structure part

46 Mounting interface

48 base plate

50 motor drive unit

52 output shaft

54 disconnecting device

58 motor housing

60 electric motor

62 worm gears (motor gearbox)

64 drive shaft

66 first chain pinion (gear wheel) Lead-retreat training

Pin (projection) a conical outer surface

Receiving opening (recess) a conical inner surface

Coupling pin first coupling element

coupling claw

holder

feather

Overload clutch

output shaft

camp

shaft coupling

connector

head Start

Longitudinal groove second sprocket

traction drives

drive chain

Opening at the first base structure part

Opening on the first base structure part0 Opening on the second base structure part1 Opening on the second base structure part2 Screw fastener 4 Angled edge area 5 Angled edge area 6 Slot 8 Slot

Claims

A shaft gate drive (14) for connection to a gate shaft (12) of a gate (10) to be driven, connected to a counterbalancing device (20), which gate shaft (12) is geared to a door leaf (18) to be driven, comprising a motor drive unit (50). and a shaft connection element (84, 86) for connecting the

Wellentorantriebes (14) to the door shaft (12), wherein the shaft connecting element

(84, 86) by means of a positive transmission gear (94) to the

Motor drive unit (50) is connected, characterized in that the motor drive unit (50) has a motor (60) and a self-locking

Motor transmission (62) and that an overload clutch (79) for disengaging the shaft connecting element

(84, 86) of the motor drive unit (50) is provided to at a

Exceeding a torque threshold cause uncoupling.

2. Wellentorantrieb according to claim 1, characterized in that the overload clutch (79) is decoupled both by a torque threshold exceeding overload torque automatically and by manual operation to manually move the door leaf (18) in emergencies or accidents.

3. Wellentorantrieb according to claim 1 or 2, characterized in that the overload clutch (79) is designed as an axial coupling.

4. Wellentorantrieb according to any one of the preceding claims, characterized in that rotatably arranged coupling elements (74, 66) of the overload clutch (79) via a projection-recess formation (68) with respect to their direction of rotation in the circumferential direction oblique flanks (69a, 70a) are engaged.

5. Wellentorantrieb according to claim 4, characterized in that the projection-recess formation (68) as a protrusion a pin (69) on one of the coupling elements (74) and as a return corresponding to the recording of the pin recess or receiving opening (70) on the other of the coupling elements (66).

6. Wellentorantrieb according to claim 5, characterized in that the pin (69) and the receiving opening (70) have an approximately circular or oval cross section and that an outer peripheral surface (69 a) of the pin (69) is truncated cone-shaped and one in the circumferential direction extending inner surface (70 a) of the receiving opening (70) is correspondingly conically shaped.

7. Wellentorantrieb according to one of claims 4 to 6, characterized in that the projection-recess formation (68) has a plurality of interlocking projections.

8. Wellentorantrieb according to one of claims 4 to 7, characterized in that a holding device (77) is provided to the projection-recess formation (68) to a certain torque threshold releasably engaged to keep so that when the torque threshold is exceeded, a decoupling takes place.

9. Wellentorantrieb according to claim 8, characterized in that the holding means comprises a biasing means (78) to bias the projection-recess formation (68) in its engaged position.

10. Wellentorantrieb according to any one of the preceding claims, characterized in that the overload clutch (79) on a motor-side drive shaft (64) of the transmission gear (94) is arranged.

11. Wellentorantrieb according to claim 10 and according to one of claims 4 to 9, characterized in that a first coupling element (74) rotatably connected to an output shaft of the motor drive unit (50) and a second coupling element by an input gear, in particular a first sprocket (66 ), the transmission gear (94) is formed.

12. gate (10) with an upwardly movable door leaf (18), a door shaft (12) with a weight compensation device (20) for

Balancing the weight of the door leaf (18) is connected to the door leaf

(18) is coupled by a gear, a fall protection (21 a) to prevent a crash of the door leaf

(18) in the case of failure of the weight compensation device (20), characterized in that a shaft gate drive (14) according to one of the preceding claims for direct rotary drive of the door shaft (12) is connected to the door shaft.

17