DOOR DRIVE WITH A SMALL HIGH-PERFORMANCE MOTOR UNIT

Abstract

A door drive for arrangement on or in connection with a door system, whereby at least one leaf element of the door system is movable. The door drive includes a motor unit with a housing, in which a stator is stationarily received, and wherein a rotor is arranged so as to be rotationally-movable in the housing and includes an output shaft, wherein the output shaft can be brought into operative connection in a driving manner with the leaf element. The rotor includes a support body, on which receiving fields are formed, on which permanent magnets are adhered.

Claims

1. A door drive for arrangement on or in connection with a door system, whereby at least one leaf element of the door system is movable, including a motor unit with a housing, in which a stator is stationarily received, and wherein a rotor is arranged so as to be rotationally-movable in the housing and includes an output shaft, wherein the output shaft is configured to be brought into operative connection in a driving manner with the leaf element, wherein the rotor includes a support body, on which receiving fields are formed, on which permanent magnets are adhered.

2. The door drive according to claim 1, wherein the rotor has a circumferential area, which forms a polygon shape with the receiving fields.

3. The door drive according to claim 1, wherein the rotor has an axis of rotation, wherein separating webs are formed between the receiving fields, which form a part of the circumferential area and extend parallel to the axis of rotation.

4. The door drive according to claim 3, wherein the receiving fields have a longitudinal extension running parallel to the axis of rotation between the separating webs and over their longitudinal edge are formed with overlay strips laterally adjoining the separating webs.

5. The door drive according to claim 4, wherein the receiving fields have a depressed area between the overlay strips such that, when the permanent magnets are arranged on the receiving fields, a defined adhesive gap is formed for receiving adhesive.

6. The door drive according to claim 1, wherein, on the side facing away from the output shaft, the permanent magnets protrude beyond the support body.

7. The door drive according to claim 1, wherein, with regard to its circumferential cross-section, the support body has a T-shape and/or, with regard to its half-section, has an H-shape, whereby inner recesses are formed, into which bearing elements are introduced.

8. The door drive according to claim 1, wherein the output shaft is formed with a rotor receiving section, on which the support body fitted with the permanent magnets is attached and/or wherein the output shaft has a first bearing section and a second bearing section, on each of which one bearing element is received, wherein the rotor receiving section is formed between the bearing sections.

9. The door drive according to claim 1, wherein the support body is formed from a metallic sintered material or a casting material.

10. The door drive according to claim 1, wherein a film-like retaining body is attached on the support body fitted with the permanent magnets.

11. The door drive according to claim 10, wherein the film retaining body includes an insulating tube made of polyester film and configured to be shrink-fitted onto the support body fitted with the permanent magnets.

12. The door drive according to claim 10, wherein the film retaining body is formed from a winding body of a fibre glass film or a fibre glass fabric.

13. The door drive according to claim 1, wherein the output shaft extends in sections from an end face of the housing such that a belt pulley is attached on said section of the output shaft.

14. The door drive according to claim 1, wherein the adhesive for adhering the permanent magnets onto the support body of the rotor comprises acrylate adhesive and/or an anaerobic adhesive.

15. A door system with a door drive according to claim 1, including at least one connecting element for connecting to a leaf element and/or at least one leaf element, with which the door drive is operatively connected in a driving manner.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Further measures improving the disclosure are represented below in detail together with the description of one preferred exemplary embodiment of the disclosure based on the figures, in which is shown:

[0031] FIG. 1 an overall view of the door drive with a motor unit according to the disclosure,

[0032] FIG. 2 a perspective view of the motor unit with a removed upper housing half,

[0033] FIG. 3 a half-section of the motor unit without an upper housing half,

[0034] FIG. 4 a perspective view of the rotor of the motor unit,

[0035] FIG. 5 a detailed view of a section of the rotor, and

[0036] FIG. 6 a perspective view of a permanent magnet.

DETAILED DESCRIPTION OF THE DRAWINGS

[0037] FIG. 1 shows an overall view of the door drive 100, as the same, in connection with a door system, can be installed in a building, with the installation on ships and in airplanes also being included, and a door drive 100 of this type serves for example as a drive for an automatic sliding door system. The basic structure of the door drive 100 forms a support profile 29, which, for a simpler view, is illustrated shortened, moreover the essential upper part of the L-shaped support profile 29 is shown sectioned in order to further reveal the further essential components of the door drive 100 in this case.

[0038] As a central component, the door drive 100 includes a motor unit 1, which has the basic shape of a cuboid, which forms the housing 10 of the motor unit 1. In order to enable an output and therefore a connection to a leaf element, not represented in more detail, of a door system, a belt pulley 27 is arranged on the motor unit 1, over which a toothed belt can be placed, which ultimately establishes the connection to the leaf element/s, for example the glass sliding elements.

[0039] Adjacent to the motor unit 1, the door drive 100 includes a power unit 30 and a controller 31, and the power unit 30 and the controller 31 are arranged at opposite sides of the motor unit 1. The motor unit 1 is fastened to the support profile 29 with a first flange element 32, wherein the first flange element 32 simultaneously receives the power unit 30 in a retaining manner. Furthermore, the motor unit 1 is connected to the support profile 29 with a second flange element 33, wherein the second flange element 33 simultaneously receives the controller 31. Alternatively, the embodiment of a single flange is also possible in order to receive at least the motor unit 1, the power unit 30 and the controller 31. Furthermore, there is the possibility for the motor unit 1, the power unit 30 and/or the controller 31 to include respectively assigned separate flange elements for arrangement in or on the support profile 29.

[0040] FIG. 2 shows a perspective view of the motor unit 1 with the housing 10, wherein only a lower housing half is represented, and the upper housing half has been removed for the representation of further components of the motor unit 1. A stator 11 is mounted on the inside of the housing 10, in particular relating to the lower housing half according to the representation, and a rotor 12 in an output shaft 13 is rotatably received within the stator 11. A belt pulley 27 is attached onto the output shaft 13 above the upper part of the housing not represented such that the motor unit 1 is embodied as a direct drive, and only a toothed belt extends between the motor unit 1 and the leaf elements of the door system, for example, an automatic sliding door.

[0041] FIG. 3 shows, in a cross-sectional view, the motor unit 1 with the rotor 12, which as essential components includes the output shaft 13 and a support body 14, and on the outside of the support body 14 are attached permanent magnets 16 at the regular distances. The belt pulley 27 is attached on the output shaft 13, on a part protruding from the housing 10.

[0042] The output shaft 13 is formed with a rotor receiving section 24, on which the support body 14 fitted with the permanent magnets 16 is attached. Furthermore, the output shaft 13 includes a first bearing section 25 and a second bearing section 26, on which respectively one bearing element 23 is received. With regard to the longitudinal axis of the output shaft 13, in this case, the rotor receiving section 24 is located between the bearing sections 25 and 26.

[0043] With regard to its circumferential cross-section, the support body 14 has a T-shape, wherein the shape of the support body 14 can be described as an H-shape with regard to its entire cross-section. As a result, inner recesses 22 are formed, into which the bearing elements 23 are introduced.

[0044] FIG. 4 shows a perspective view of the rotor 12 with the output shaft 13 and with the support body 14, wherein a lower recess 22 is visible. Within the single visible recess 22 within the support body 14 a bearing element 23 is shown inserted by way of example, which serves to rotatably receive the output shaft 13. On the outer circumference, the support body 14 has receiving fields 15, on which the permanent magnets 16 are attached, wherein by way of example a permanent magnet 16 is not shown in the case of three receiving fields 15.

[0045] FIG. 5 shows an enlarged view of the part of the support body 14 in the circumferential area of the removed permanent magnets 16 according to FIG. 4. The thus freely visible receiving fields 15 are separated from each other by separating webs 19, which form a part of the circumferential area 17 of the rotor 12, and the separating webs 19 extend parallel to the axis of rotation of the rotor, namely in its vertical direction. Laterally on the separating webs 19 are formed overlay strips 20, on which the permanent magnets 16 rest and therefore obtain a defined placement.

[0046] Depressed areas 21 extend between the overlay strips 20, and if the permanent magnets 16 are arranged on the receiving fields 15, they rest laterally on the overlay strips 20 and are retained by an adhesive, which is located in the gap thus formed between the permanent magnets 16 and the depressed area 21 of the receiving fields 15. A defined adhesive gap is achieved over the depressed area 21 with a slightly concave arching such that an acrylate adhesive, in particular an anaerobic adhesive, can achieve a correspondingly high adhesive performance. This ensures that the shear permanent magnets 16 do not become loose when operating the motor unit 1, wherein, due to the direct drive connection to the toothed belt and therefore to a leaf element of a door system, the motor unit 1 is formed as a slow-running motor, such that the rotor does not reach high rotational speeds, and therefore the flow forces of the permanent magnets 16 are also not too high when operating the motor unit 1.

[0047] Finally, FIG. 6 shows an individual view of a permanent magnet 16, and a front surface 24 forms a curved outer side, which, in the adhered state, points in the direction of the stator, and a rear surface 25 preferably forms a flat surface, which points in the direction of the receiving field 15 and, with the depressed area 21, forms a cavity for the adhesive.

[0048] The design of disclosure is not limited to the above indicated preferred exemplary embodiment. In fact, a number of variants is conceivable, which make use of the represented solution, even with essentially different types of designs. All features and/or advantages including the constructive details or spatial arrangements, emerging from the claims, the description or the drawings, may be essential to the disclosure, both by themselves and in the most varied combinations.