EP1817472B1 - Door driving device comprising a heating system - Google Patents

Description

The invention relates to a door drive device in the form of a Drehtorantriebsvorrichtung according to the preamble of the appended claim 1, as known from DE 199 34 533 A1 is known.

From the DE 34 17 678 A1 is an electrical heating tape to prevent condensation in standstill machines or equipment known.

From the EP 1 223 286 A2 is described a drive for a movably mounted on a stationary frame wings of a window or a door. The drive is sealed watertight against the bypass. According to one embodiment, the drive is provided with a spindle gear. Another embodiment has a unilaterally backward rigid push chain. In the backstep push chain embodiment, a heater is provided for drying moisture yet to penetrate. Both drives are configured to move a wing of a window pivotable about a horizontal axis so as to drive a folding movement, for example to move the wing in a ventilation position.

On the other hand, door driving devices generally serve for automatically driving gates passable by vehicles. They have recently found widespread use because they allow you to easily control and move a gate from the vehicle. Most door drives are currently located inside the space to be closed, so for example inside a garage arranged.

However, garages are also often found on land or enclosures, which are enclosed by a fence, an outer wall or the like and in turn have an entrance gate. In the area of private property, these are often revolving gates with a hinged door leaf, which can be swiveled back and forth about a vertical axis. But there are also sliding gates with a perpendicular to the entrance to moving gate.

In order not to have to get out of the vehicle at the entrance to the enclosure, gate drives for such outdoor gates are becoming increasingly popular in the private sector as well.

Especially in private homes, it is desirable to design the corresponding door drive device as low maintenance. Also, with regard to a possible nighttime operation in residential areas noises during operation should be avoided as far as possible.

Gate drives have in the vast majority of cases a gear motor, which is usually an electric motor with integrated gear, usually a worm gear on. In Drehtorantriebsvorrichtungen a drive unit is further often provided, which has a first stationary to be steered unit and a second hinged on the Drehtorflügel unit, wherein the two units for driving the rotational movement of the swing gate are motor-linearly displaced to each other, the drive units via a thrust cylinder, occasionally on Hydraulic cylinder or the like fluid cylinder, are linearly movable. The thrust cylinders often work with a spindle drive.

Toroidal drives generally have a number of moving parts with the attendant maintenance and noise problem. In order to counter these problems, one often sees combinations of materials of plastic and metal or lubrication with fluid lubricant such as grease or oil.

However, this maintenance and noise can not be reduced or avoided in any case, since the properties of almost any kind of lubrication are temperature dependent and especially outside to be used door drives, but also in unheated rooms to be used Innentorantriebe depending on the climatic zone significant temperature fluctuations and very low temperatures can be exposed.

From the US 5,680,729 is a provided with a hydraulic motor Schiebetorantrieb for opening a sliding gate known. For particularly cold climatic conditions, hydraulic lines below the level of temperature in the ground are buried, and it will used a guided around the hydraulic motor heating cable. In another embodiment, a swing gate operator is described, in which a hydraulic motor is provided with a toothed wheel which meshes with a circular arc-shaped curved rigid perforated strip fastened to the swing gate leaf.

And from the aforementioned DE 199 34 533 A1 It is known to drive in a lock a rotatable or pivotable poppet with an electric motor, coupled with a transmission drive in the form of a standstill motor. The electric motor drive and / or the transmission are combined with an electric heater. Further details of how the drive can be designed to drive the rotatable or pivotable blocking wing, are not specified. As an example, a drive for a sliding gate is shown.

The object of the invention is to provide a door drive device referred to in the preamble of claim 1, which operates as quiet as possible and low maintenance in a variety of applications.

This object is achieved by a door drive device with the features of the attached claim 1.

Advantageous embodiments of the invention are the subject of the dependent claims.

According to the invention the drive device of a Drehtorantriebsvorrichtung, which has two mutually linearly movable units to each other, provided with a heating device.
Now, if moving parts of the door drive device by means of the heater does not fall below a minimum temperature, then lubricant remain supple and fluid, so that the drive device operates a total smooth and quiet. As a result, the wear occurring and thus the required maintenance is reduced.
Since most door drives have an electric motor, a current source is provided on the door drive, so that an electric heater is particularly easy to integrate. For example, the heating device has at least one electrical heating wire on. The heating device is preferably controllable by a control unit which is usually provided for controlling the door drive device anyway. For example, the control unit is provided with an additional board which serves to control the heating and has a temperature sensor and to which an electrical heating band of the heating device is connected.

Simple and inexpensive, the heater is buildable, if you only provides a single power level for the heater. Temperature-controlled switching on and off makes it easy to maintain a minimum temperature of moving parts.

For energy saving according to the invention a heat conducting device is provided, which directs the heat of the heater to the moving parts of the door drive device. According to the invention, the heating device has a housing which encapsulates and / or forwards the heat of the heating device. For the purpose of forwarding the housing according to the invention of good heat-conducting material, in particular metal, is formed. In a particularly preferred embodiment, the housing consists of light metal, such as aluminum or an aluminum alloy. In this housing, the moving parts, namely a spindle gear, a thrust cylinder and / or a fluid cylinder, so for example a hydraulic cylinder or a compressed air cylinder housed.

For encapsulation, it is preferable that the heater is insulated together with the parts to be heated of the door drive device by a thermal insulation against the outside environment. As a result, not only the heat of the heater, but also the heat generated by friction on the moving parts is encapsulated, so that the heater must be turned on less often overall.

Preferably, fluid-lubricated movable parts of the door drive can be heated by the heating device. This keeps the grease or lubricating oil, which is used for lubrication, even at extremely low outside temperatures. A door drive provided with the heater can thus also be used in countries with very harsh climatic conditions, such as, for example, in areas located near the Arctic Circle.

Especially in such extremely low outside temperatures, the use of a door drive for the user is particularly desirable. However, there has always been problems in operation with previous door drives, which can be avoided with the training according to the invention.

The heating device is preferably provided for heating one or more gears of the door drive device. In a particularly preferred embodiment, the heating device both the transmission or other moving components of a motor drive unit, -. B. geared motor - which has an electric motor and a first gearbox integrated therewith, as well as a second gearbox, which converts the rotational movement of the motor drive unit into a linear movement, heated. This is possible in a particularly simple manner in that a preferably flexible heating band is provided, which is looped around the motor gear or, in particular, wound with a plurality of windings and is guided further along the linear gear.

As a result, any motor drive unit units, usually consisting of electric motor with integrated self-locking gear, can be used for the geared motor without any further measures on the gearbox housing. The second gear or linear gear can be housed, for example, in the aforementioned housing and / or in the aforementioned heat insulation of the heater.

For rough outdoor use is further preferred that the heating tape is moisture-protected, so that neither condensation nor precipitation lead to disturbances in the operation of the heater.

Preferably, the heating tape is provided with a plurality of heating wires, which are fixed to one another by a carrier material, for example a glass mat or glass fibers. A PTFE-insulated heating tape has also proven to be particularly suitable.

Fig. 1

eine Draufsicht auf eine Antriebseinrichtung eines Drehtorantriebes als Beispiel für eine Drehtorantriebsvorrichtung;

Fig. 2

einen Schnitt durch die Antriebseinrichtung entlang der Linie A-A von Fig. 1; und

Fig. 3

einen Schnitt durch die Antriebseinrichtung entlang der Linie B-B von Fig. 1.

An embodiment of the invention will be explained in more detail with reference to the accompanying drawings. It shows:

Fig. 1

a plan view of a drive means of a Drehtorantriebes as an example of a Drehtorantriebsvorrichtung;

Fig. 2

a section through the drive means along the line AA of Fig. 1 ; and

Fig. 3

a section through the drive means along the line BB of Fig. 1 ,

In the figures, a total of 1 designated swing gate operator 1 for driving a movable about a vertical axis swing gate (not shown) of a swing gate is shown as an example of a door drive device. The Drehtorantrieb is essentially formed by a drive device 2, which has a first stationary to be controlled unit 3 and a second unit 4, which is connectable to the Drehtorflügel.

The first unit 3 has a motor housing 5 and an outer housing 6 connected thereto as part of a push cylinder 7.

The motor housing 5 is normally closed with a cover, which has been omitted in the figures for purposes of illustration.

The motor housing 5 is provided by means of a first connection device 8, which here has a fork-shaped receptacle 9 for a first door drive fitting. The first door drive fitting, not shown, can be fastened, for example, to a pillar on which the rotary door leaf is suspended by means of hinges. The fork-shaped receptacle 9 then takes a projecting portion of the gate impact between them and is supported there by means of a bolt, not shown, such that the drive means 2 is pivotable about a first axis of rotation 10 pivotally connected to the pillar.

The motor housing takes as a motor drive unit a geared motor 11 in itself. This geared motor 11 is formed by an electric motor 12 with an integrated first gearbox 13. The first gearbox 13 is, for example, a self-locking worm gear.

The outer housing 6 of the push cylinder 7 telescopically takes the second unit 4 in it. This second unit 4 has a tubular piston part 14 which is slidably received in the outer housing 6 of the push cylinder 7. To drive the The spindle gear 15 has a by means of the geared motor 11 about a longitudinal axis 16 rotatably driven trapezoidal screw 17 and the trapezoidal screw 17 detecting trapezoidal nut 18, which is fixed to the motor-side end of the piston member 14.

At the free end, the piston part 14 carries a second connection device 19. The second connection device 19 is mounted rotatably about the longitudinal axis 16 on the tubular piston part 14. This rotational movement is locked by acting as emergency release device bolt 20. The second connection device 19 has a further fork-shaped receptacle 21, which serves in a comparable manner as the first fork-shaped receptacle 9 for connection to a gate fitting, namely here to a wing fitting, not shown, which can be fastened to the rotary door leaf to be driven. In operation, the second connection device 19 is rotatable relative to the wing fitting about a second axis of rotation 22.

The swing gate operator 1 further comprises a heater 23 for heating the moving parts of the swing gate operator. The heater 23 has a flexible moisture-proof heating tape 24 which is connected at one end to a control of the electric motor 12, not shown. In this case, the heating tape is connected in such a way that a closed (heating) circuit is formed by one or more through the entire heating cable and back running heating wires or the like heating conductor. On the housed in the motor housing 5 control also a temperature sensor (also not shown) is arranged, which turns on when falling below a minimum temperature, the heater by energizing the heating circuit. The heating tape 24 forms a PTFE-insulated heater for keeping constant temperature, wherein the individual heating element is fixed by means of a carrier material of glass fiber. The heating tape 24 is first wound around the electric motor 12 with a plurality of windings 25 and then subsequently passed through the motor housing 5 and through the outer housing 6 of the push cylinder 7. As in particular from Fig. 3 As can be seen, the outer housing 6 is essentially formed by an aluminum profile 26. The aluminum profile 26 has a channel 27 for receiving the heating tape 24. The aluminum profile 26 is thus heated by the heating tape 24 and conducts the heat around the spindle gear 15th

In non-illustrated embodiments, the aluminum profile 26 may still be wrapped by a thermal insulation. The heat insulation can turn into a then as outer housing acting pipe, which is preferably made of metal for stability and protection reasons, be added.

The operation of the swing gate operator 1 is as follows:

In operation, the control of the electric motor 12 is controlled. This drives via the integrated with him motor gear 13, the trapezoidal threaded spindle 17 about the longitudinal axis 16 rotationally. As a result, the trapezoidal nut 18 is moved in the axial direction relative to the longitudinal axis 16, so that the second unit 4 shifts linearly relative to the first unit 3 along this longitudinal axis 16. The two gears 13, 15 are each fluid-lubricated, for example by means of filled in cavities 28 grease.

At low temperatures, the lubricant used becomes viscous or hardens or becomes brittle when solid lubricants are used. Also, at very cold temperatures, any water that has entered may freeze and immobilize the drive device 2 of the swing gate operator 1. To avoid this, when falling below a minimum temperature, for example, falls below + 1 ° C, the heater 23 is turned on and off when a shutdown temperature, for example + 4 ° C, is exceeded.

In this way, the lubricants used remain smooth, and the formation of ice is avoided. As a result, the friction is kept low. Due to the consequent ease of maintenance are minimized. In addition, squeaking noises and other noises are reduced.

LIST OF REFERENCE NUMBERS

1

Pingkai

2

driving means

3

first unit

4

second unit

5

motor housing

6

outer casing

7

push cylinder

8th

first connection device

9

bifurcated recording

10

first axis of rotation

11

gearmotor

12

electric motor

13

Motor gearbox (first gearbox)

14

tubular piston part

15

Spindle gear (second gear)

16

longitudinal axis

17

Acme screw

18

Trapezoidal threaded nut

19

second connection device

20

bolt

21

bifurcated recording

22

second axis of rotation

23

heater

24

heating tape

25

windings

26

aluminum profile

27

channel

28

cavity

Claims (10)

1. Door drive apparatus constructed as a rotary door drive apparatus (1) for driving a rotary door panel that can be pivoted about a vertical spindle, having a drive mechanism (2) provided with a heater (23), characterised in that
   the drive mechanism (2) comprises a first unit (3) that is to be fixedly hinged and a second unit (4) which is to be articulated to the rotary door panel, the two units (3, 4) being movable by motor drive means in linear manner to one another in order to drive the rotary movement of the rotary door panel,
   in that the heater is associated with a housing (6) of heat-conducting material, particularly metal and more particularly light metal,
   in that a spindle gear (15), a thrust cylinder (7) and/or a fluid cylinder is provided and in that the heater (23) is configured to heat the spindle gear, the thrust cylinder or the fluid cylinder,
   in that the spindle gear (15), the thrust cylinder (7) and/or the fluid cylinder is arranged inside the housing (6) associated with the heater, and in that the housing is of elongate construction, the housing (6) comprising, in the longitudinal direction, a channel (27) along which the heater (23) is passed through substantially the entire housing (6).
2. Door drive apparatus according to one of the preceding claims, characterised in that it comprises an electric motor (12) and in that the heater (23) is an electric heater.
3. Door drive apparatus according to one of the preceding claims, characterised in that the heater comprises at least one heating wire.
4. Door drive apparatus according to one of the preceding claims, characterised in that it further comprises a control unit to which the heater (23) is attached.
5. Door drive apparatus according to one of the preceding claims, characterised in that the heater (23) is temperature-controlled in order to maintain a minimum temperature on the moving parts (13, 15).
6. Door drive apparatus according to one of the preceding claims, characterised in that the heater (23) is constructed with a single power stage such that it switches on below a first temperature threshold and switches off above a second temperature threshold.
7. Door drive apparatus according to one of the preceding claims, characterised in that the heater (23) and the moving parts (15) of the door drive apparatus to be heated thereby are thermally insulated from the external environment by thermal insulation which is preferably provided with a metal jacket.
8. Door drive apparatus according to one of the preceding claims, characterised in that the heater (23) is configured so as to heat a plurality of gears (13, 15) of the drive mechanism (2) for the door drive apparatus (1).
9. Door drive apparatus according to claim 8, characterised in that the heater (23) is configured so as both to heat a first gear (13), which is part of a geared motor (11), and also to heat a second gear (15) formed by the spindle gear, which converts a rotary movement of an output shaft of the first gear (13) into a linear movement for driving a door panel.
10. Door drive apparatus according to one of the preceding claims, characterised in that the heater (23) comprises a heating belt (24) which is looped or wound round a motor drive assembly (12) or a first gear (13), and in that the heating belt (24) is additionally passed along the second gear (15) in order to warm it.

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