Abstract
A drive system for an elevator installation includes a drive and a drive suspension for fastening the drive to a support element of the elevator installation. The drive suspension includes a rotary joint for tiltably mounting the drive on the support element and an adjustment device for setting a tilt of the drive about the rotary joint. The support element can be a guide rail wherein the drive system is arranged in an upper end region of the elevator installation.
Claims
1. A drive system for an elevator installation, the drive system comprising: a drive having a drive shaft extending along a shaft axis; a drive suspension adapted to fasten the drive to a support element of the elevator installation; the drive suspension including a rotary joint for tiltably mounting the drive on the support element and an adjustment device for setting a tilt of the drive about the rotary joint; and when the drive is fastened to the support element by the drive suspension, the adjustment device enables setting a tilt of the drive about the rotary joint with respect to the support element thereby enabling the drive to drive a carrier means of the elevator system with the shaft axis extending at the set tilt.
2. The drive system according to claim 1 wherein the support element is a guide rail for guiding an elevator car.
3. The drive system according to claim 1 wherein the rotary joint includes a fixing part for fastening to the support element and a first suspension part fastened to the drive, and wherein the fixing part and the first suspension part are rotatably connected to each other.
4. The drive system according to claim 3 wherein the first suspension part has at least one first opening formed therein and the fixing part has at least one second opening formed therein, and wherein the rotary joint includes a connecting element passing through the at least one first opening and the at least one second opening.
5. The drive system according to claim 1 wherein the adjustment device includes a fixing part for fastening to the support element and a second suspension part fastened to the drive and connected to the fixing part, and wherein the fixing part and the second suspension part are displaceable relative to one another.
6. The drive system according to claim 5 wherein the tilt of the drive about the rotary joint is set by linearly displacing the second suspension part relative to the fixing part.
7. The drive system according to claim 1 wherein the rotary joint is arranged above a friction drive pulley of the drive and wherein the adjustment device is arranged below the friction drive pulley.
8. The drive system according to claim 1 wherein an axis of rotation of the rotary joint extends perpendicular to a shaft axis of the drive.
9. The drive system according to claim 1 wherein the drive suspension includes at least one isolation element positioned to reduce or prevent a transmission of vibrations or structure-borne noise from the drive to the support element.
10. An elevator installation comprising: the drive system according to claim 1; an elevator car; a counterweight connected to the elevator car by a carrier means; and wherein the drive of the drive system drives the carrier means to move the elevator car and the counterweight.
11. The elevator installation according to claim 10 wherein the drive is arranged in an upper end region of the elevator installation.
12. The elevator installation according to claim 10 wherein the carrier means is a belt.
13. The elevator installation according to claim 10 wherein the elevator car has a drive-side side wall that faces the drive system and wherein a shaft axis of the drive runs parallel to the drive-side side wall.
14. The elevator installation according to claim 10 wherein the elevator installation includes another of the drive system for moving the elevator car.
15. A method for installing a drive on a support element of the elevator installation according to claim 10, the method comprising the steps of: mounting the drive on the support element by the rotary joint; stabilizing the drive with respect to the support element; and setting a tilt of the drive about the rotary joint.
Description
DESCRIPTION OF THE DRAWINGS
(1) Various aspects of the invention are explained in more detail with reference to embodiments in conjunction with the drawings, in which:
(2) FIG. 1 is a schematic view of a preferred embodiment of a drive system;
(3) FIG. 2 is a schematic sectional view of a preferred embodiment of a drive system;
(4) FIG. 3 is a schematic sectional view of a further preferred embodiment of a drive system;
(5) FIG. 4 is a schematic view of a preferred embodiment of an elevator installation;
(6) FIG. 5 is a schematic plan view of an elevator installation according to preferred embodiments; and
(7) FIG. 6 is a schematic representation of a preferred method for installing a drive on a support element of an elevator installation.
DETAILED DESCRIPTION
(8) FIG. 1 is a schematic view of a drive system 1 according to a possible embodiment of the invention. The drive system 1 comprises a drive 3 which is fastened to a support element 5 via a drive suspension 7. In FIG. 1, the drive system 1 comprises a guide rail for guiding an elevator car, the guide rail forming the support element 5. FIG. 2 is a schematic sectional view of the drive system 1. The sectional view shows a section along a shaft axis 61 of a drive shaft 15 of the drive 3 parallel to a longitudinal axis of the guide rail. In FIGS. 1 and 2, the shaft axis 61 of the drive 3 is aligned at least substantially perpendicularly to the axis of rotation 31 of the rotary joint 9. In particular, the drive system 1 is designed such that the shaft axis 61 runs at least substantially parallel to a drive-side side wall of an elevator car.
(9) The drive suspension 7 comprises a rotary joint 9 for tiltably mounting the drive 3 on the support element 5. The rotary joint 9 comprises a fixing part 21 which is fastened to the support element 5. The rotary joint 9 also comprises a first suspension part 23 which is fastened to the drive 3. The fixing part 21 is rigidly connected to the support element 5 and the first suspension part 23 is rigidly connected, in particular screwed, to the drive 3. In the embodiments of FIGS. 1 and 2, the first suspension part 23 has two spaced apart legs with first openings along the axis of rotation 31 of the rotary joint 9. As shown, for example, in FIG. 2, the fixing part 21 extends between the two first openings of the first suspension part 23, with a second opening of the fixing part 21 being arranged between the two first openings of the first suspension part 23. The hinge-like interlocking of the fixing part and the first suspension part can, for example, increase the flexural rigidity of the rotary joint 9 with respect to torques perpendicular to the axis of rotation 31 of the rotary joint 9, in particular with respect to torques in the direction of the longitudinal axis of the guide rail. A connecting means 29 is arranged so as to pass through the two first openings and the second opening. In FIGS. 1 and 2, the connecting means 29 is designed as a bolt, in particular as a threaded bolt, which is guided through the first openings and the second opening and fixed with a nut.
(10) The drive suspension 7 comprises an adjustment device 11. The adjustment device 11 comprises the fixing part 21 and a second suspension part 41. The second suspension part 41 can be linearly displaced relative to the fixing part 21. In the embodiment of FIG. 2, the second suspension part 41 can be displaced relative to the fixing part 21 by rotating an adjustment screw 43 of the adjustment device 11. By displacing the second suspension part 41 relative to the fixing part 21, a tilt of the drive 3 about the axis of rotation 31 of the rotary joint 9 relative to the support element 5 can be set or adjusted. In particular, a tilt of the drive shaft 15 and a friction drive pulley 13 arranged on the drive shaft 15 relative to the support element 5 can also be set. Setting the tilt of the friction drive pulley 13 can prevent or reduce skewing of the belt, for example when using a belt as a carrier means.
(11) The drive suspension 7 of FIGS. 1 and 2 comprises isolation elements 47 which are arranged between the first suspension part 23 and the fixing part 21 and between the second suspension part 41 and the fixing part 21. In particular, a further isolation element 47 is arranged around the connecting means 29 in the region of the first opening of the first suspension part 23 and in the region of the second openings of the fixing part 21. The isolation elements 47 are designed to reduce, in particular to damp, the propagation of vibrations or structure-borne noise from the drive 3 to the support element 5.
(12) The drive 3 is designed as a gearless electric motor in FIG. 2. The drive suspension 7 comprises an adapter plate 33 which is fastened to the electric motor. The first suspension part 23 and the second suspension part 41 are fastened to the drive 3 via the adapter plate 33. The drive 3 comprises drive electronics 35 and a drive cooling system 37. In FIGS. 1 and 2, the drive electronics 35 and the drive cooling system 37 are arranged on an underside of the drive 3. As a result, the space requirement of the drive 3 in horizontal directions can be reduced, for example.
(13) FIG. 3 is a view of a further embodiment of a preferred drive system 1. In FIG. 3, the fixing part 21 has two second openings along the axis of rotation 31 of the rotary joint 9. The first suspension part 23 extends between the two second openings of the fixing part 21, with a first opening of the first suspension part 23 being arranged between the two second openings. A connecting means 29 extends through the two second openings and the first opening. In FIG. 3, the fixing part 21 comprises a frame structure 40, which is fastened to the support element, and intermediate blocks 39, in each of which blocks a second opening of the fixing part 21 is formed. In particular, the intermediate blocks 39 can transmit loads between the connecting element 29 and the frame structure 40. The frame structure 40 and the intermediate blocks 39 are rigidly connected to one another, for example screwed together, in FIG. 3.
(14) In FIG. 3, the adjustment device 11 comprises a second suspension part 41 which partially encloses the friction drive pulley 13 of the drive 3. The second suspension part 41 is designed in the form of a cage around the friction drive pulley 13, the cage-shaped second suspension part 41 having windows for a carrier means to pass through. On the side of the second suspension part 41 that faces the support element 5, the adjustment device 11 has an adjustment screw for setting the tilt of the drive 3 with respect to the support element 5. Isolation elements 47 are arranged between the first suspension part 23 and the fixing part 21 and between the second suspension part 41 and the fixing part 21. In the embodiment of FIG. 3, the first suspension part 23, the second suspension part 41, and the adapter plate 33 are formed in one piece. A one-piece design can in particular give a drive suspension a high level of stability.
(15) FIGS. 4 and 5 show an embodiment of an elevator installation 51. The elevator installation 51 comprises a drive system 1 according to the embodiments described herein comprising a drive 3 and a drive suspension 7 for fastening the drive 3 to a support element 5. A guide rail for guiding an elevator car 53 is provided as the support element 5 in FIGS. 4 and 5. The elevator car 53 is connected to a counterweight 55 via a carrier means 57. The carrier means 57, for example a belt, is guided over a friction drive pulley 13 of the drive 3. The drive 3 is designed to drive the carrier means 57 and to move the elevator car 53 and the counterweight 55 vertically.
(16) In FIGS. 4 and 5, the drive 7 is arranged in an upper end region of the elevator installation 51. As shown by way of example in the plan view of the elevator installation 51 in FIG. 5, a shaft axis 61 of the drive 3 is aligned at least substantially parallel to a drive-side side wall 63 of the elevator car 53. The axis of rotation 31 of a rotary joint of the drive suspension 7 is oriented at least substantially perpendicularly to the shaft axis 61 and at least substantially perpendicularly to a vertical direction. The tilt of the shaft axis 61 with respect to a vertical direction or with respect to the longitudinal axis of the guide rail is set, for example, so as to be at least substantially perpendicular.
(17) The elevator installation 51 of FIGS. 4 and 5 has a further drive system 71 according to the embodiments of a drive system described herein. The further drive system 71 comprises a further drive 73 and a further drive suspension 75 for fastening the further drive 73 to a further support element 79, which is formed by a further guide rail in FIGS. 4 and 5. The further drive 73 is designed to drive a further carrier means 81 which is connected to the elevator car 53 and a further counterweight 77. The use of a further drive system can allow the use of smaller or lighter drives. In particular, the space requirement of a drive in a shaft head or a shaft pit can be reduced. In addition, smaller or lighter drives can be installed more easily.
(18) FIG. 6 shows a method 100 for mounting a drive on a support element of an elevator installation in an embodiment. At step 110, the method 100 includes mounting the drive on the support element via a rotary joint. For example, a fixing part of a drive suspension is fastened, for example screwed tight, to a guide rail at 110. A first suspension part and a second suspension part are fastened to the drive via an adapter plate. The drive is then positioned in such a way that a bolt is guided through at least one first opening of the first suspension part and at least one second opening of the fixing part to form a hinge-like rotary joint. The bolt is fixed with a nut. The method can offer the advantage that the drive can be positioned and mounted on the support element manually, for example.
(19) After mounting, the drive is stabilized with respect to the support element at step 120. In the embodiment, the second suspension part is connected to the fixing part to form an adjustment device, with the second suspension part and the fixing part being displaceable relative to one another in a settable manner via an adjustment screw after the connection. In particular, the drive can no longer be moved freely about the axis of rotation of the rotary joint after stabilization; rather, it can only be moved by rotating the adjustment screw.
(20) At step 130, a tilt of the drive about the rotary joint is set by rotating the adjustment screw. The tilt of the drive or the shaft axis of the drive is set in such a way that the shaft axis runs at least substantially perpendicularly to a vertical direction or such that a skewing of a belt is prevented or reduced.
(21) In accordance with the provisions of the patent statutes, the present invention has been described in what is considered to represent its preferred embodiment. However, it should be noted that the invention can be practiced otherwise than as specifically illustrated and described without departing from its spirit or scope.
