WO2009021637A1 - Lifting mechanism - Google Patents

Abstract

Lifting mechanism, wherein a wagon can be moved in a guided manner on a linkage, in particular comprising rails and/or a toothed rod, wherein the movement can be carried out up to a first height, wherein a primary conductor system is laid along the direction of movement up to a second height, with the wagon comprising a drive and a secondary coil via which the drive can be supplied with electrical power in a non-contacting manner, wherein the secondary coil is inductively coupled to the primary conductor system.

Description

 hoist

Description:

The invention relates to a hoist.

In hoists is known to provide the platform, so a car with a drive.

The invention is therefore based on the object to improve the safety of plants.

According to the invention the object is achieved in the hoist according to the features indicated in claim 1.

Important features of the invention in the hoist are that it is a carriage on a linkage, in particular comprising _^ rails and / or rack, guided, is movable

the movement being executable up to a first height,

wherein along the direction of travel a primary conductor system is laid to a second height,

wherein the carriage comprises a drive and a secondary coil, via which the drive can be supplied without contact with electrical power,

wherein the secondary coil is inductively coupled to the primary conductor system,

the second height being smaller than the first one.

The advantage here is that the security is carried out by extending the route, with no energy can be supplied to the car in this extended area. Thus, safety is guaranteed by physical laws and therefore absolute. In an advantageous embodiment, the secondary coil has a capacitance connected in series or in parallel such that the associated resonant frequency essentially corresponds to the frequency of a current impressed into the primary conductor system. The advantage here is that the leadership of the car may have greater tolerance. In particular, the hoist is thus providable as a construction hoist.

In an advantageous embodiment, the height difference of the second to the first height is greater than the height corresponding to the complete conversion of kinetic energy into potential energy, wherein the initial kinetic energy is related to the maximum achievable speed of the drive. The advantage here is that from every possible operating condition, a safe braking of the car takes place and thus the safety is improved.

In an advantageous embodiment, the primary conductor system comprises a forward conductor and a return conductor, wherein the forward conductor are electrically connected to the return conductor in the second height. The advantage here is that the pick-up collision moves out of the primary conductor system, for which purpose the reverse loop is oriented transversely, in particular perpendicular to the plane spanned by the primary conductor system level.

In an advantageous embodiment, the linkage for wheels of the car comprises a rail and / or is designed as a rail. The advantage here is that the car is supported with its wheels on the linkage and the distance between the secondary coil and the primary conductor system is determined by this.

In an advantageous embodiment, a rack is provided on the linkage to which a drivable by the drive gear part is engaged. The advantage here is that a positive drive can be used. Alternatively, however, non-positive driving modes can be realized.

In an advantageous embodiment, the hoist is composed of similar modules, wherein at least one uppermost module is provided without a primary conductor system and at least at a lower module in addition a primary conductor system is mounted. The advantage here is that the security can be increased by the necessary modules is added an additional. Thus, no special extra effort is necessary. Further advantages emerge from the subclaims. The invention is not limited to the combination of features of the claims. For the skilled person, further meaningful combination options of claims and / or individual claim features and / or features of the description and / or figures, in particular from the task and / or by posing the task by comparison with the prior art task.

LIST OF REFERENCE NUMBERS

Linkage load rack carriage forward conductor return end with groove for reverse loop

The invention will now be explained in more detail with reference to figures:

FIG. 1 shows a hoisting gear according to the invention, the section of which is shown enlarged in FIG. 1a.

On a building is provided a hoist comprising a linkage to which a rack 3 is mounted. The carriage 4 comprising a transferring head is connected to the load 2, more particularly a car, and comprises a drive engaged with the rack and thus the stroke movement is effected. The drive comprises an electric motor, which is fed by a converter, which can be supplied via a secondary coil, which is provided with longitudinally displaced along the linkage arranged primary conductors inductively coupled. In this case, a medium-frequency current is impressed in the primary conductor. This preferably has a frequency between 10 and 100 kHz. In addition, the secondary coil is a capacity connected in series or in parallel, that the associated resonant frequency of the center frequency substantially corresponds.

The secondary coil is in the transmitter head, which is also called pick-up includes.

The lead conductor 5 and the return conductor 6 are short-circuited at one end by being connected to one another within the groove of an end piece 7 via a reverse loop.

As is clear from Figure 1, the linkage 1 and the rack 3 is provided higher in the vertical direction, as the reverse loop is located.

Thus, although the carriage 4 is movable with its pickup containing the secondary coil higher than the position of the reverse loop, but falls off when the position of the reverse loop, the power supply fails.

The remaining length of the carriageway, comprising the linkage and the rack, which exceeds this position, is dimensioned such that the kinetic energy associated with the maximum achievable speed in the vertical direction at least corresponds to the increase in potential energy when driving through the residual length. In this way, at most, the kinetic energy is converted into potential energy and then the movement is stopped by means of gravity and vice versa.

The primary conductor system comprising the forward conductor 5 and the return conductor 6 can be clipped into plastic laying profiles which are detachably connectable to the lower module of the lifting unit constructed from two modules in FIG. The upper module lacks these installation profiles and the primary conductor system.

Thus, the safety of the modular hoist can be improved by merely placing a topmost module.

Claims

claims: 1st hoist, wherein a carriage is movably guided on a linkage, in particular comprising rails and / or rack, the movement being executable up to a first height, characterized in that βπtiaπg the direction of travel is a primary conductor system laid to a second height, wherein the carriage comprises a drive and a secondary coil, via which the drive can be supplied without contact with electrical power, wherein the secondary coil is inductively coupled to the primary conductor system, the second height being smaller than the first one. 2. Hoist according to at least one of the preceding claims, characterized in that the secondary coil connected in series or in parallel a capacity such that the associated resonant frequency of the frequency of an impressed into the primary conductor system current substantially corresponds. 3. A hoist according to at least one of the preceding claims, characterized in that the height difference of the second to the first height is greater than the height corresponding to the complete conversion of kinetic energy into potential energy, wherein the case initial kinetic energy to the maximum achievable speed of the drive is related. 4. Hoist according to at least one of the preceding claims, characterized in that the primary conductor system comprises a forward conductor and a return conductor, wherein the forward conductor are electrically connected to the return conductor in the second height. 5. Hoist according to at least one of the preceding claims, characterized in that the linkage for wheels of the carriage comprises a rail and / or is designed as a rail. 6. Hoist according to at least one of the preceding claims, characterized in that on the linkage a rack is provided on which a drivable by the drive toothing part is engaged. 7. Hoist according to at least one of the preceding claims, characterized in that the hoist is composed of similar modules, wherein at least one uppermost module is provided without a primary conductor system and at least at a lower module in addition a primary conductor system is mounted.