DE102014018247A1 - Rack lift - Google Patents

Abstract

The invention relates to a rack and pinion elevator with an elevator car (1) and an electric motor (2) which can be supplied with electric power and is coupled via a pinion (3) with at least one stationary rack (5) a controllable relative movement of the elevator car (1) to the at least one rack (5) along a travel path (0) can be generated by the rotation of the at least one electric motor (7) and thus of the pinion (3), wherein the elevator car (1) has at least one Energy storage (4), which via means (7, 8) which are arranged along the track (0) and on or in the elevator car (1) is contactlessly rechargeable and the at least one electric motor (2) exclusively with electrical energy from the at least one energy store (4) can be supplied.

Description

The invention relates to a rack and pinion elevator, which is used in particular in passenger transport in high-rise buildings and in mines.

In high-rise buildings and mines, elevators are primarily used in which the car is suspended on ropes by means of an electric motor drive is moved. A distinction must be made between a drum lift and a traction sheave elevator.

Such suspended on ropes elevator baskets may not be used in fires, since the drive technology can be damaged by the fire quickly, so it comes to accidents and there is a risk that people are trapped in the lifts.

In the DE 200 13 076 U1 Therefore, it is proposed for an elevator with suspended on ropes car to equip the prime mover with an emergency drive on the failure of the engine via a pinion-gear connection, the drive of the car is switchable. The emergency drive should be powered by a battery.

A further disadvantage of cars suspended on ropes is that the height section to be negotiated is limited by the weight of the ropes, or rope weight balancing chains or sub-ropes must be used.

In rack lifts, the elevator car is equipped with its own, preferably electric motor, which drives a pinion, which meshes with a running in the height or depth rack. The rack is arranged on walls or masts.

Such elevators are commonly used as construction hoists ( DE 296 05 686 U1 ) Crane lifts, rescue lifts or maintenance lifts used.

Another disadvantage of elevators is that nearly 60% of the electricity consumer is not used for driving, but for the stand-by operation, as studies in Switzerland have shown (a lift consumes more power for stopping and waiting than if he moves, http://www.energie-umwelt.ch/, March 2011 ).

The object of the invention is to propose a drive for a rack and pinion, which works energy-efficient and allows the use of the elevator even in case of fire.

This object is achieved with the features of claim 1. Advantageous embodiments are the subject of the dependent claims.

In a rack elevator with an elevator car and connected to the elevator car, can be supplied with electric power electric motor, which is coupled by a gear with a toothed pinion with at least one stationary rack, so that by the rotation of the at least one electric motor and thus the pinion a controllable relative movement of the elevator car is generated for at least one rack along a guideway, the invention proposes that the elevator car has at least one energy storage, which is arranged via means that are arranged along the track and on or in the elevator car, contactless and at least one electric motor with electric power from the at least one energy storage can be supplied.

Preferably, the means for contactless energy transfer to the energy storage work inductively.

With the proposed drive without ropes and moving cables, the rack-and-pinion elevator can also be used in the event of a fire or power failure, because it has enough stored energy to drive through the infrastructure several times. This drive concept also ensures the approach of the upper floor of a house, without roof structures for cables, wheels or traction sheaves are necessary, which is another advantage.

In an advantageous embodiment, it is provided that the position of the elevator car along the track can be detected by sensors and these signals are at least usable for temporary activation of the arranged along the track means for contactless charging of the at least one energy storage.

This embodiment ensures high energy efficiency in contactless energy transmission, since only the means for contactless energy transmission are activated, which have such a distance from each other, which guarantees a rewarding energy transfer. As is known, a small distance between the energy transmitter and the receiver is a prerequisite for a high efficiency of contactless energy transmission.

It is further provided that the at least one energy store additionally has connections for stationary charging, which can be coupled in a terminal region of the travel path with corresponding external connections.

This embodiment creates the possibility of additional charging of the energy store. This can be z. B. be made at night with cheap night electricity, which further increases energy efficiency.

Furthermore, an advantageous embodiment provides that, in particular, downward movements of the elevator car are used in order to additionally generate electrical energy. For this purpose, it is proposed that the elevator car has a generator which can be coupled to the toothed rack or a further rack or the at least one electric motor, so that at least on a downward travel, electric energy can be generated by the generator and fed to the energy store.

Such a generator can be switched according to a further embodiment in the engine operation. Thus, a reserve engine is available for a failure in the regular electric motor.

For safety, it is essential that the state of charge of the at least one energy storage device can be displayed, preferably transmitted by radio transmission and / or evaluated, and that when the value falls below a predetermined value, the elevator can be immobilized.

The above-mentioned signals, which are generated by sensors to detect the position of the elevator car, are used in another embodiment to set the hold position for exit or discharge in accordance with the floor surfaces of houses, etc., and to drive safely.

From the perspective of possible accidents, it may be advantageous if a balance with sensor signals from the exit or Endladebereich is made before the release of the stop position, so that the holding position z. B. in flue gases in the exit or Endladebereich not approached, but is traversed.

The invention will be explained with reference to the drawings.

The 1 shows a rack lift with an elevator car 1 along the driveway 0 from bottom to top and vice versa is movable and in exit or Endladepositionen 20 by appropriate signal specifications z. B. via the control panel 18 stops.

Along the driveway 0 is a guide rail with a rack 5 arranged. The elevator car 1 attacks with their guides 6 around parts of the guide rail.

With the elevator car 1 is an electric motor 2 connected, the geared about the pinion 3 in the rack 5 engages, so that by the rotation of the electric motor 2 a controllable relative movement of the elevator car 1 to the rack 5 along the driveway 0 can be generated.

This arrangement is exemplary. Likewise, two racks can 5 be provided, in each case a pinion 3 engages to a force symmetry with respect to the guidance of the elevator car 1 to achieve. Necessary but should be a tolerance compensation between the parallel rack-pinion gears.

Essential to the invention is that the elevator car 1 at least one energy store 4 that has over funds 7 . 8th along the driveway 0 and at or in the elevator car 1 are arranged, contactless is chargeable and the at least one electric motor 2 exclusively with electrical energy from the at least one energy store 4 is available.

The means 7 . 8th for contactless energy transfer here are the energy transmitter 8.1 - 8.n. and the energy receiver 7 , wherein the energy transfer takes place by inductive means.

The energy transmitters 8.1 - 8.n. are here along the driveway 0 spaced apart from each other. They are all via the power supply 10 from the stationary electricity supplier 13 supplied.

The arrangement of energy transmitters 8.1 - 8.n. is preferably carried out in a shaft made of non-flammable and the energy transfer little hindering material.

This spaced arrangement of the energy transmitter 8.1 - 8.n. makes it possible that not all energy transmitters 8.1 - 8.n. are constantly activated, but their activation is vornehmbar controlled. This is done via the control switches 9 which supplies power to the respective energy transmitter 8th only releases when the energy receiver 7 in an optimal or nearly optimal position for the energy transmission with respect to the respective energy transmitter 8th located.

The respective energy transmitter 8th will be disabled again when the power receiver 7 the elevator car 1 in the optimal reception area of another energy transmitter 8th has gone.

This change is the movement of the elevator car 1 along the driving gear 0 owed and is through the sensors 16 or 16 and 17 detected.

That means the location of the elevator car 1 along the driveway 0 through sensors 16 . 17 can be detected and these signals are at least usable for temporary activation of the along the track 0 arranged means 8.1 - 8.n. for contactless charging of the at least one energy store 4 ,

Furthermore, it is shown that the at least one energy store 4 additionally via connections 12 For stationary charging has, in an end of the track 0 with corresponding external connections 11 of the stationary power supplier can be coupled.

The energy storage 4 can thus be stationary over the connections at night or at a longer standstill 11 / 12 be charged and during operation via the non-contact energy transmitter 8.1 - 8.n. and the energy receiver 7 ,

In addition, a further energy source is provided, namely a generator 14 standing at the elevator car 1 is arranged. This generator 14 who is here with the rack 5 is coupled, generated during the downward travel electric energy, the energy storage 4 can be supplied. Only when driving downwards means that when the elevator car is raised, it is disconnected from the electric motor 2 not to burden additionally.

The generator may also be equipped with another rack or the at least one electric motor 2 be coupled.

The generator 14 but not only provides power to recharge the energy storage 4 , but is also switchable to a motor operation. He forms in this way a replacement drive in the event that the actual electric motor 2 havariert. Of course, he must then geared constantly on the tickling 15 with the rack 5 or coupled to another rack.

The state of charge of the energy store 4 is displayable by radio 19 is transmitted. He is subject to an evaluation, so that when falling below a predetermined value of the elevator is shut down.

The signals of the sensors 16 or 16 and 17 for detecting the position of the elevator car 1 along the driveway 0 are further control technology feasible in holding signals in exit and / or unloading 20 , In this case, the stop signals are subjected to a tax audit to the effect whether the exit and unloading area at the exit and unloading positions 20 outside the elevator car 1 is enterable. This means that in the exit and unloading positions 20 outside the elevator car 1 a corresponding sensor system is installed, which detects flue gases, heat, vapors, etc. and confirms or rejects the stop signal after appropriate computational processing. If rejected, the elevator car will drive through.

It is understood that the the drive of the elevator car 1 forming electric motors 2 and energy storage 4 as well as the generator 14 , the sensors 16 . 17 and the connecting cables connecting the individual components are correspondingly encapsulated or housed in order to withstand fire loads.

LIST OF REFERENCE NUMBERS

0

roadway

1

car

2

electric motor

3

Pinion of the electric motor

4

energy storage

5

rack

6

Guides for elevator car

7

Agent for contactless energy transfer = energy receiver

8th

Agent for contactless energy transfer = energy transmitter

9

control switch

10

Power supply to energy transmitters

11

Connection for stationary charging

12

Connection for stationary charging

13

stationary electricity supplier

14

generator

15

Pinion of the generator

16

sensor

17

sensor

18

Switchboard

19

radio transmission of the state of charge

20

Exit and unloading position

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 20013076 U1 [0004]
• DE 29605686 U1 [0007]

Cited non-patent literature

• http://www.energie-umwelt.ch/, March 2011 [0008]

Claims (9)

Rack lift with an elevator car ( 1 ) and one with the elevator car ( 1 ), supplied with electric power electric motor ( 2 ), the transmission technology via a pinion ( 3 ) with at least one stationary rack ( 5 ) is coupled, so that by the rotation of the at least one electric motor ( 7 ) and thus the pinion ( 3 ) a controllable relative movement of the elevator car ( 1 ) to at least one rack ( 5 ) along a track ( 0 ), characterized in that the elevator car ( 1 ) at least one energy store ( 4 ), which has funds ( 7 . 8th ), along the track ( 0 ) and on or in the elevator car ( 1 ) are arranged, contactless is chargeable and the at least one electric motor ( 2 ) exclusively with electrical energy from the at least one energy store ( 4 ) is available. Rack and pinion elevator according to claim 1, characterized in that the means ( 7 . 8th ) for contactless energy transfer to the energy store ( 4 ) work inductively. Rack and pinion elevator according to claim 1 or 2, characterized in that the position of the elevator car ( 1 ) along the track ( 0 ) by sensors ( 16 . 17 ) is detectable and these signals are at least usable for temporary activation of the along the track ( 0 ) ( 8.1 - 8.n. ) for contactless charging of the at least one energy store ( 4 ). Rack and pinion elevator according to one of claims 1 to 3, characterized in that the at least one energy store ( 4 ) additionally via connections ( 12 ) for stationary charging, which in an end region of the track ( 0 ) with corresponding external connections ( 11 ) can be coupled. Rack and pinion elevator according to one of claims 1 to 4, characterized in that the elevator car ( 1 ) via a generator ( 14 ), with the rack ( 5 ) or another rack or the at least one electric motor ( 2 ) is coupled, so that by the generator ( 14 ) at least during a downward travel electric power generated and the energy storage ( 4 ) is zuluhrbar. Rack and pinion elevator according to claim 5, characterized in that the generator ( 14 ) is switchable to a motor operation. Rack and pinion elevator according to one of claims 1 to 6, characterized in that the state of charge of the at least one energy store ( 4 ) can be displayed, preferably by radio technology ( 19 ) is transferable and / or evaluable and when falling below a predetermined value of the elevator is silent. Rack and pinion elevator according to one of claims 3 to 7, characterized in that the signals of the sensors ( 16 ) for detecting the position of the elevator car ( 1 ) along the track ( 0 ) control technology can be implemented in holding signals in exit and / or unloading positions ( 20 ). Rack and pinion elevator according to claim 8, characterized in that the holding signals are subject to a tax-technical examination to the effect whether the exit and unloading area at the exit and unloading positions ( 20 ) outside the elevator car ( 1 ) is enterable.

Images