Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
  • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
  • B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
  • B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
  • B66B5/18—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces

Definitions

• the invention relates to an electromechanical actuator for actuating a brake of an elevator installation, to a method for operating such an actuator and to an elevator installation comprising such an actuator.
• EP 2 794 451 B1 discloses an electromechanical actuator for actuating an elevator brake with a force accumulator, a holding device and a rear part device.
• An essential aspect of such actuators is the safe operation in the event of a defect of the elevator system.
• the holding device must be actively energized during normal operation; eliminates the power supply, the brake is activated.
• An energy-saving power supply is therefore desirable.
• the structure of the actuator should be as simple as possible and include few moving parts, which guarantee a sufficient ease of operation despite years of non-operation in an emergency.
• the object of the invention is to provide an improved electromagnetic actuator for actuating a brake of an elevator installation. This object is achieved by an actuator, a method and an elevator installation with the features specified in the main claims. Advantageous developments emerge from the subclaims, the following description and the drawings.
• the electromechanical actuator according to the invention comprises a force accumulator, a
• the actuator is configured such that, in a standby state, the retainer holds the connector in a standby position against an actuating force applied by the force accumulator, and in a firing state, the retainer does not hold the connector in the ready position and the connector is translated to a firing position.
• a return phase of the actuator is using the return from the trigger state in the
• Standby state convertible The holding device is connected via a toggle lever arrangement with the connector, wherein in the ready state, the toggle lever arrangement has a straighter alignment than in the release state.
• the method according to the invention for operating such an actuator comprises the following method steps: transferring the actuator from the standby state into the
• Tripped state by reducing a applied by the holding device Willingness holding power; Transferring the actuator from the release state to the standby state during a return phase using the return member and overcoming the operating force provided by the force accumulator, thereby generating a return holding force based on the holding device; Holding the connector in its
• the standby holding force provided by the holding device during the standby state is lower than the maximum return holding force provided by the holding device during the return phase.
• the inventive method is also characterized by the fact that defined in the return phase, a greater holding force is provided as in the operating state. This can
• an electromagnet is at least partially operated with a larger current during the return phase than in the standby state.
• the holding device provides a comparatively high holding power to stretch the toggle lever assembly, this holding power is then redefined for the duration of the comparatively long operating state again reduced.
• the toggle assembly comprises a first lever and a second lever, wherein the first lever is connected via a knee joint to the second lever, and the first lever with the second lever includes a knee angle.
• a more extended alignment of the toggle lever arrangement is particularly present when a knee angle between two toggle levers of the toggle lever arrangement is closer to 180 ° than in
• the knee angle in the standby state is in particular greater than the knee angle in the triggering state, wherein the knee angle can in particular assume a maximum value of 180 °.
• a knee angle of 180 ° thus represents the most stretched orientation.
• the knee angle is defined in particular by the angle of two straight lines through the articulation points of the associated toggle levers.
• the actuator comprises guide means for selectively guiding the holding device from a release position to a return position.
• the release position of the holding device is present when the holding device can no longer hold the connector in its standby position and the actuator can assume the triggering state. In principle, no holding force can be provided by the holding device in the release position.
• the holding device in turn can apply a holding force, in particular a scrubholhaltekraft, which is required during the
• the guide means may comprise a guide slot defining a trajectory of the
• Holding device defined during the return phase. During the triggering state and in preparation for the return phase, a first part of the holding device can be selectively guided in the direction of a second part of the holding device.
• the elevator installation according to the invention comprises an actuator of the aforementioned type and / or an actuator which is operated by the aforesaid method.
• Fig. 1 shows an actuator according to the invention in a first embodiment in one
• Fig. 2 shows the actuator of Figure 1 in a trigger state
• Fig. 3 shows the actuator of Figure 1 during a rinse phase
• FIG. 4 shows a diagram comprising the profile of the holding force and the triggering force as well as the course of the knee angle during the different operating states of the holding device;
• Fig. 5 is a schematic representation of an elevator system according to the invention comprising an actuator according to the invention.
• FIG. 6 shows an actuator according to the invention in a second embodiment in one
• Fig. 7 shows the actuator of Figure 6 during the remindholphase in side view.
• FIG. 5 shows an elevator installation 21 according to the invention, which has a car 22, which is accommodated within an elevator shaft 23. On the basis of guide rails 24, the car is held vertically movable by means not shown guide rollers. In the event of a defect, one or more safety brakes 9 can be activated.
• the elevator installation 21 comprises an actuator 1 according to the invention with a connector 7. The connector 7 conducts a release force from the actuator 1 to the brakes 9.
• FIGS. 1 to 3 show the same actuator 1 in respectively different operating states.
• the actuator 1 initially comprises a frame 8 on which the components of the actuator 1 are mounted.
• the connector 7 in this embodiment is a rod which is displaced for operation parallel to the direction of extension thereof.
• the coil spring 2 is clamped between a first power storage stop 18, here exemplified in the form of a stop ring, which is fixedly attached to the connector 7 and with the connector 7 moves, and a second power storage stop 19, which is fixedly mounted on the frame 8.
• the connector 7 is subjected to an actuating force F 2 starting from the second force accumulator stop 19 in the direction of the first force accumulator stop 18.
• the first power storage stop 18 is displaced until it strikes a third trigger stop 20 on the frame 8.
• the connector 7 can be held by a holding device 3 in a standby position, which provides a counterforce on the connector 7 via a toggle lever arrangement 10.
• the toggle lever assembly 10 includes for this purpose a first lever 11 and a second lever 12, which are rotatably connected to each other at a knee joint 13.
• the first lever 11 is rotatably supported on a first support point 14 on the frame 8 from;
• the second lever 12 is rotatably supported at a second support point 15 on the connector 7.
• the holding device 3 is connected to the toggle lever assembly 10.
• the holding device 3 comprises two parts 4, 5, namely one, in particular ferromagnetic, anchor plate 5 and a switchable electromagnet 4, of which a first part (here the anchor plate 5) on the knee and a second part (here the electromagnet 4) with the interposition of a Return member 6 is mounted on the frame 8.
• the two parts 4, 5 may also be arranged vice versa.
• the return divider 6 may comprise a spindle drive.
• the return divider 6 can be transferred between a ready position (FIGS. 1 and 2) and a return position (FIG. 3).
• the return divider 6 carries a part 4 of the holding device 3 and can transfer the holding device 3 between a release position (FIGS. 2) and a return position (FIG. 3).
• FIG. 1 shows the holding device 3 in its ready position.
• the return divider 6 comprises a guide slide 16, which slides in a guide slot 17 and thus guides the return divider 6 during its extension movement in a predefined path.
• the return divider 6 is shown in its standby position, in Figure 2, the return divider 6 is shown in its return position.
• the energy store 2, the holding device 3, the return divider 6, the two parts 4, 5 of the holding device 3, the toggle lever arrangement 10 and the connector 7 are each in a standby position.
• the return divider 6 is supported on the frame 8 and holds the first part 4 of the holding device 3 in its standby position, which in turn holds the second part 5 of the holding device 3 in its standby position.
• the second part 5 holds the toggle lever assembly 10 in its standby position.
• the toggle assembly 10 holds the connector 7 in its standby position.
• To initiate the triggering state II ( Figure 2) eliminates the readiness holding force by switching off the electromagnet 4. This also includes a reduction of the holding force below a threshold value.
• the adhesion of the anchor plate 5 on the magnet 4 is omitted, whereby the second part 5, the toggle lever assembly 10 and the connector 7 are transferred due to the application of the energy storage 2 in the release position.
• the return divider 6 initially remains in the ready position; the position of the holding device 3 is hereby referred to as a release position, in which the first part 4 in the ready position and the second part 5 in the release position.
• Figures 6 and 7 show an alternative embodiment of the actuator during the standby phase I and the rinse phase III.
• the structure and operation largely corresponds to that of the actuator of Figures 1 to 3. In this respect, the previous description is also applicable to this actuator; the deviations are described below.
• the coil spring 2 is clamped between a first power storage stop 18, here for example in the form of a shoulder which is fixedly attached to the first lever 11 and moves with the first lever 11, and a second power storage stop 19 which is fixedly mounted on the frame 8. Since the coil spring 2 is now arranged in the region of the first lever, the frame 8 can be made correspondingly smaller.
• the arrangement and effective direction of the holding device 3 and the return divider 6 is approximately parallel to the direction of the first lever II.
• the second lever 12 preferably has a transverse arm 25, on which the second part 5 is arranged.
• the cross boom 25 increases the knee. Again, the second part 5 is located at the knee. As a result, the overall space of the actuator is reduced.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Maintenance And Inspection Apparatuses For Elevators (AREA)
• Manipulator (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

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ID=60083932

Family Applications (1)

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Cited By (3)

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Citations (5)

Family Cites Families (1)

• 2016
  • 2016-09-28 DE DE102016218635.3A patent/DE102016218635A1/de not_active Ceased
• 2017
  • 2017-09-27 WO PCT/EP2017/074507 patent/WO2018060251A1/de unknown
  • 2017-09-27 CN CN201780059790.2A patent/CN109789995B/zh active Active
  • 2017-09-27 ES ES17784204T patent/ES2904327T3/es active Active
  • 2017-09-27 EP EP17784204.4A patent/EP3519339B1/de active Active

Patent Citations (5)

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