Patent Application
20240253947
The invention relates to a drive system for an elevator installation, an elevator installation, and a method for installing a drive on a support element of an elevator installation.
Known elevator installations for transporting people or loads include an elevator car which can be moved vertically in an elevator shaft. The elevator car is usually connected to a counterweight via a carrier means. A drive for moving the elevator car along a guide rail can be arranged, for example, on a drive assembly in a shaft head of the elevator shaft or in a machinery room above the elevator shaft. However, previously known drive systems for elevator installations require a lot of space, for example in the shaft head of an elevator installation, or they are complex to install.
An object of the invention is to specify a drive system for an elevator installation and in particular an elevator installation which is improved compared to drive systems or elevator installations known from the prior art, with the space requirement of the drive system being reduced or the assembly of the drive system being simplified. Another object of the invention is to specify a method for installing a drive of an elevator installation.
The objects are achieved with a drive system and a method according to the advantageous developments and embodiments found in this description.
One aspect of the invention relates to a drive system for an elevator installation, comprising a drive and a drive suspension for fastening the drive to a support element of the elevator installation, wherein the drive suspension comprises: a rotary joint via which the drive can be fastened to the support element and which is designed for tiltably mounting the drive on the support element; and an adjustment device for setting the tilt of the drive about the rotary joint.
A further aspect of the invention relates to an elevator installation comprising a drive system according to any of the embodiments described herein, an elevator car, and a counterweight which is connected to the elevator car via a carrier means, the drive being designed to drive the carrier means.
Yet another aspect of the invention relates to a method for installing a drive on a support element of an elevator installation, comprising mounting the drive on the support element by means of a rotary joint, stabilizing the drive with respect to the support element, and setting a tilt of the drive about the rotary joint.
In preferred embodiments, the drive includes a motor, in particular a motor and a gear. However, the drive can be gearless. The drive has a drive shaft. The drive shaft is rotatable about a shaft axis of the drive. A friction drive pulley of the drive can be fastened to the drive shaft. The friction drive pulley is designed to provide contact between a carrier means of an elevator installation and the drive. In particular, the friction drive pulley is designed to transmit a force provided by the drive to the carrier means. The drive suspension is preferably designed such that, when the drive is fastened to the support element, the friction drive pulley is arranged between the motor of the drive and the support element.
Preferably, the drive system is designed such that, in the installed state, it comprises a substantially horizontally extending shaft or shaft axis having a friction drive pulley formed in the shaft.
Preferably, the rotary joint is arranged above the substantially horizontally extending shaft axis, wherein the adjusting device is arranged below the shaft axis.
The drive system preferably includes a guide rail for guiding an elevator car, with the guide rail forming the support element. In further preferred embodiments, the support element can be a shaft wall of an elevator installation or a carrying structure in an elevator shaft of an elevator installation.
In preferred embodiments, the rotary joint of the drive suspension should be understood to be a rotatable connection between the drive and the support element. An axis of rotation of the rotary joint is preferably at least substantially perpendicular to a shaft axis of the drive. “At least substantially perpendicular” should be understood here in particular to mean a perpendicular orientation or an orientation deviating from a perpendicular orientation by a maximum of 15°, for example by a maximum of 10° or by a maximum of 5°. In embodiments, the axis of rotation can be aligned at least substantially perpendicularly to the shaft axis of the drive and perpendicularly to a longitudinal axis of a guide rail. The shaft axis of the drive can be aligned at least substantially perpendicularly to the axis of rotation of the rotary joint and at least substantially perpendicularly to a vertical direction, for example perpendicularly to the longitudinal axis of a guide rail. In preferred embodiments, the shaft axis of the drive is aligned with the guide rail.
The adjustment device is preferably arranged below the rotary joint. The rotary joint is designed in particular to transfer a tensile load from the drive to the support element. The adjustment device is designed, for example, to transfer a compressive load from the drive to the support element. In embodiments, the rotary joint is arranged above a friction drive pulley of the drive and the adjustment device is arranged below the friction drive pulley. In particular, the friction drive pulley is arranged between the rotary joint and the adjustment device. In further embodiments, the adjustment device is arranged around the friction drive pulley. For example, the adjustment device can extend in the form of a cage around the friction drive pulley in the direction of the support element, with the adjustment device having at least one window for a carrier means to pass through. In preferred embodiments, the friction drive pulley has a friction drive pulley diameter of at most 150 mm, in particular at most 100 mm, or at most 70 mm.
In preferred embodiments, the rotary joint of the drive suspension comprises a fixing part, which is designed for fastening to the support element, and a first suspension part, which is fastened to the drive. The fixing part and the first suspension part are rotatably connected to one another about an axis of rotation. The fixing part is preferably rigidly connected to the support element and the first suspension part is rigidly connected to the drive. Rigid connections can be provided by joining methods, for example by screwing.
Preferably, the fixing part is designed such that it has at least one arc-like edge, wherein the arc-like edge runs directly above a friction drive pulley in the installed state.
The arc-like edge has the advantage that the forces acting on the edge (due to the weight of the drive and the cabin, which in the installed state is suspended from the friction drive pulley via a support means) are distributed uniformly over the edge. In comparison with a less advantageous rectangular design, a force concentration can thus be prevented at the intersection of the edges extending at right angles to one another. Furthermore, by arranging the arc-like edge directly above the friction drive pulley, a kind of arc-like span can be formed, which extends in an arc-like manner from one radial end of the friction drive pulley towards the other end of the friction drive pulley. Thus, the distance between the arc-like edge and the traction surface of the friction drive pulley increases, at least initially, from one radial end to the other radial end. Thus, the arc-like edge forms a lateral boundary which begins at the radial end of the friction drive pulley directly above the traction surface. Lateral movement of the support means is thus prevented by the edge. This prevents the carrier means from jumping without additional edges on the friction drive pulley provided for this purpose.
Preferably, the fixing part and the support element are designed such that the fixing part can be inserted partially into the support element and can be fastened to the support element in an end position of the inserted state.
As a result, the drive and the drive suspension can already be supplied as a pre-installed drive/drive suspension unit and can be easily inserted in the field into an opening provided for this purpose in the support element and fastened in an end position of the inserted state. The comparatively complex installation of the drive/drive suspension unit can thus be separated from installation in the field. In this way, in particular, it is not necessary for the rotary joint which is comparatively complex to install to be installed in the field. The functionality of the fine adjustment of the orientation of the friction drive pulley can thus be combined with easy installation of the drive (and the drive suspension) in the field.
In preferred embodiments, the first suspension part has at least one first opening and the fixing part has at least one second opening. The rotary joint comprises a connecting element guided through the at least one first opening and the at least one second opening. The connecting element can be a pin, a bolt, or a screw, for example. In particular, the connecting element is arranged along the axis of rotation of the rotary joint.
In a preferred embodiment, the axis of rotation is arranged exactly above the center of the friction drive pulley, so that an automatic alignment of the friction drive pulley results when the weight of the drive is disregarded.
In preferred embodiments, the rotary joint is designed as a hinge. In embodiments, the first suspension part has at least one first opening along the axis of rotation of the rotary joint. The fixing part has at least two second openings along the axis of rotation of the rotary joint. The first suspension part extends between the at least two second openings of the fixing part, with the at least one first opening of the first suspension part being arranged between two second openings of the fixing part.
In preferred embodiments, the rotary joint is designed to support torques or torque components in directions perpendicular to the axis of rotation. In particular, the rotary joint is designed to support torques or torque components in the direction of the shaft axis of the drive or in the direction of the longitudinal axis of a guide rail. The fixing part and the first suspension part can be in contact along the axis of rotation via at least two contact surfaces, with the contact surfaces extending around the axis of rotation, in particular around the axis of rotation and perpendicular to the axis of rotation. In particular, the fixing part and the first suspension part can form a torque support. For example, the rotary joint can at least partially support torques or torque components that result from the driving of a carrier means or the movement of an elevator car or a counterweight.
Preferably, the adjustment device of the drive suspension comprises a fixing part, which is designed for fastening to the support element, and a second suspension part, which is fastened to the drive and connected to the fixing part. The fixing part and the second suspension part are displaceable relative to one another in a settable manner. The adjustment device can be designed in particular as a linear adjustment device. The adjustment device can comprise an adjustment screw, the adjustment device being designed to displace the fixing part and the second suspension part relative to one another, in particular to move them linearly relative to one another, by rotating the adjustment screw. The second suspension part is preferably rigidly connected to the drive and the fixing part is rigidly connected to the support element.
In preferred embodiments, the tilt of the drive about the rotary joint can be set by displacing the second suspension part relative to the fixing part. For example, the tilt can be set by rotating an adjustment screw of the adjustment device, the second suspension part being displaced relative to the fixing part by rotating the adjustment screw. In particular, the drive suspension is designed to tilt the drive about the axis of rotation of the rotary joint with respect to the support element, for example with respect to a guide rail, by means of the displacement. In particular, a maximum tilt of 20°, for example a maximum of 10° or a maximum of 5°, can be set by the displacement. In embodiments, the fixing part is part of the rotary joint and the adjustment device.
The drive suspension preferably comprises at least one first isolation element, in particular a mechanical isolation element or a buffer element, wherein the at least first isolation element is configured to reduce or prevent the transmission of vibrations or structure-borne noise from the drive to the support element, wherein the first isolation element is preferably attached to the rotary joint, wherein the drive suspension preferably has a second isolation element, wherein the second isolation element is preferably attached to the adjustment device. The isolation element(s) is/are preferably a spring-damping element. The drive can be decoupled from the support element with regard to the propagation of vibrations or structure-borne noise by means of the isolation elements. In particular, the isolation elements are designed to damp vibrations or structure-borne noise between the drive and the support element. The isolation elements can be arranged between a first suspension part and a fixing part or between a second suspension part and a fixing part. A connecting means, which is arranged so as to pass through at least one first opening of the first suspension part and at least one second opening of the fixing part, is preferably at least partially encased by the first isolation element. In particular, the connecting means is surrounded by the isolation element in the region of the at least one first opening, for example in the region of the at least one first opening and the at least one second opening. In embodiments, the at least one isolation element comprises plastic or rubber material. The at least one isolation element can offer the advantage that structure-borne noise is prevented from spreading to a building in which an elevator installation comprising a drive system according to the embodiments described herein is installed.
In preferred embodiments, the drive suspension, in particular the first suspension part or the second suspension part, comprises an adapter plate which is designed for fastening the drive suspension to a suspension-side end of the drive. The adapter plate is rigidly connected, for example screwed, to the drive. The adapter plate can have a shaft opening for a drive shaft of the drive to pass through. In embodiments, the adapter plate is manufactured as a separate component. In further embodiments, the adapter plate is manufactured as part of the first suspension part or as part of the second suspension part. In particular, the first suspension part and the second suspension part, including the adapter plate, can be manufactured in one piece.
According to embodiments, an elevator installation comprises a drive system according to any of the embodiments described herein. The elevator installation comprises an elevator car. The elevator car is designed to be moved along a guide rail. The elevator installation comprises a counterweight, which is connected to the elevator car via a carrier means. The guide rail is preferably arranged between the elevator car and the counterweight. The drive is designed to drive the carrier means. As a result of the carrier means being driven, the elevator car and the counterweight can be moved vertically, for example in opposite vertical directions. Directional statements regarding “upward”, “downward”, “horizontally”, or “vertically” should be understood here in particular in relation to the direction of gravitational force.
In preferred embodiments, the drive is arranged in an upper end region of the elevator installation. An upper end region of the elevator installation should be understood, for example, to mean a vertical region of the elevator installation, the vertical region corresponding to the upper 30%, in particular the upper 20% or the upper 10%, of the height of the elevator installation. For example, the drive can be arranged in a low shaft head. In particular, the elevator installation can be designed without a machinery room.
The carrier means preferably comprises a belt. For example, a belt may be made of sheathed cords, such as sheathed steel cables. In cross section, the belt has a width which is greater than a thickness of the belt. For example, setting a tilt of the drive relative to the support element can prevent or reduce skewing of the belt or uneven loading of the belt. In particular, the tilt can be readjusted over the lifetime of the elevator installation. In further embodiments, the carrier means comprises at least one cable, for example at least one steel cable.
In elevator installations according to preferred embodiments, the elevator car has a drive-side side wall that faces the drive system, and a shaft axis of the drive runs at least substantially parallel to the drive-side side wall. “At least substantially parallel” should be understood here in particular to mean a parallel alignment or an alignment deviating from a parallel alignment by a maximum of 20°, for example by a maximum of 10° or by a maximum of 5°. In particular, a friction drive pulley of the drive can be arranged between the counterweight and the elevator car in a plan view of the elevator installation.
Preferred embodiments include at least one further drive system. In particular, elevator installations include at least one further drive system according to the embodiments described herein. The drive system and the at least one further drive system can be arranged on opposite sides of the elevator car. The at least one further drive system preferably drives a further carrier means which is connected to the elevator car and in particular to a further counterweight. The use of at least two drive systems can offer the advantage that smaller or lighter drives can be used. In particular, the space requirement of a drive system can be reduced. For example, in a plan view of the elevator installation, a drive can be arranged between the elevator car and a shaft wall or a counterweight.
Preferred embodiments of the method for installation comprise pre-installation of the drive and the drive suspension to form a drive suspension unit. This is done by fastening a first suspension part of a drive suspension to the drive and fastening a fixing part to the first suspension part. It therefore comprises connecting the first suspension part to the fixing part to form a rotary joint of the drive suspension. For example, the drive, together with the first suspension part, can be arranged relative to the fixing part in such a way that the openings of the first suspension part and of the fixing part are arranged along the axis of rotation of the rotary joint to be formed. A connecting means, for example a pin, a bolt, or a screw, can then be guided or arranged through the openings to form the rotary joint. This method step is preferably already carried out during manufacture at the factory. The second suspension part, which is connected to the fixing part, is also preferably already installed at the factory, so that a drive suspension unit is provided in the field in which a tilt is adjustable.
The method preferably further comprises the step of inserting the pre-installed drive suspension unit into the support element until an end position is reached and of subsequently fastening the drive suspension unit to the support element, for example by screws.
The method preferably comprises setting a tilt and aligning the drive relative to the support element by displacing the second suspension part relative to the fixing part. The displacement can be carried out by rotating an adjustment screw of the adjustment device. In particular, a tilt about the axis of rotation of the rotary joint is set. In preferred methods, the drive is installed on a guide rail as a support element.
Preferred embodiments can offer the advantage over the prior art that a drive can be installed on a support element, for example on a guide rail, in a space-saving manner. In particular, according to preferred embodiments, drive systems can be installed without superstructures on or above the guide rail or without a machinery room. Drive systems according to preferred embodiments can be installed in elevator shafts with low shaft heads. In particular, according to embodiments, drive systems can be equipped with particularly small or light drives. Preferred embodiments can also offer the advantage that a tilt of the drive with respect to the support element can be set. Skewing can be prevented or reduced in particular when a belt is used as the carrier means. The tilt can be readjusted over the lifetime of the elevator installation.
Various aspects of the invention are explained in more detail with reference to embodiments in conjunction with the drawings, in which:
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 can be fastened to the support element 5 (not shown, see
The drive suspension 7 comprises an adjustment device 11. The adjustment device 11 extends between 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
The fixing part 21 is designed in at least two parts and has at least one first sheet metal part 25 and at least one second sheet metal part 27, wherein the first sheet metal part 25 is designed for fastening to the first suspension part 23 and for fastening to the support element 5. The second sheet metal part 27 is designed for fastening to the second suspension part 41. The first sheet metal part 25 and the second sheet metal part 27 are preferably connected to one another by rivets 28, wherein the second sheet metal part 27 is preferably designed as a U-profile.
The drive suspension 7 of the embodiment shown comprises a second isolation element 48 which is 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 first isolation element 47 is arranged around the connecting means 29 in the region of the openings of the first suspension part 23 and of the fixing part 21. The isolation elements 47, 48 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 (see
In the embodiment shown, the drive 3 is designed as a gearless electric motor. 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.
In
The elevator installation 51 of
After the pre-installation, the drive/drive suspension unit is inserted into the support element at 120 and, in an end position of the inserted state, the drive/drive suspension unit is fastened to the support element, for example by screwing.
At 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.
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.
| Number | Date | Country | Kind |
|---|---|---|---|
| 21174726.6 | May 2021 | EP | regional |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/EP2022/063496 | 5/19/2022 | WO |
