WO2014030906A1

WO2014030906A1 - Elevation apparatus using worm driving unit

Info

Publication number: WO2014030906A1
Application number: PCT/KR2013/007458
Authority: WO
Inventors: 김남영
Original assignee: Kim Nam Young
Priority date: 2012-08-20
Filing date: 2013-08-20
Publication date: 2014-02-27
Also published as: KR20140024131A; KR101410342B1

Abstract

An elevation apparatus comprises: a cabin part moving along an elevator elevating path; a worm driving unit which moves together with the cabin part and of which a rotary shaft is disposed in parallel to a moving path of the cabin part; a worm supporting unit provided inside the elevating path along the moving path of the cabin part and comprising a plurality of support teeth formed to correspond to worm teeth of the worm driving unit in a tooth interval cycle of the worm driving unit; a first magnet module provided in the support teeth; a plurality of second magnet modules which are provided along the worm teeth for providing repulsion or attraction forces with respect to the first magnet module; and a power connection unit for similarly connecting the plurality of second magnet modules as an entire group or as a partial group.

Description

Elevating device using worm drive

The present invention relates to a lifting device using a worm drive, and more particularly, to a lifting device including an elevator or other lifting device capable of transporting passengers or cargo without wires or ropes.

An elevator (Elevator) is a device for transporting people or cargo vertically and vertically in response to gravity, and is used throughout high-rise buildings as well as low-rise buildings. In general, the elevator has a rope type elevator and a hydraulic elevator according to the driving method, in addition, there is a screw type, rack and pinion type, and a ropeless elevator using a linear motor instead of a hoist.

The rope elevator has a machine room for driving the elevator on the top floor, and a traction machine of the machine room moves the cabin up and down by connecting a car and a balance weight with a rope. Such a machine room may be detrimental to the building for several reasons, such as height limitations.

Recently, high-performance elevators have emerged along with the construction boom of high-rise buildings, and high-speed elevators moving at a high speed of about 60 km / h (1000 m / min) or more have been developed. There are also double-deck elevators that have two elevators connected up and down to improve their transport capacity, and there are twin elevators that operate two elevators independently in one elevator passage.

Skyscrapers require faster moving elevators to facilitate vertical copper transportation. To speed up an elevator, tension is applied to the wires that is proportional to the square of the speed, and the higher the elevator, the greater the tension. Therefore, the cross section of the rope becomes larger and the weight of the rope increases. In addition, because the length of the rope must be as long as the long distance of the skyscraper, the rope must be thicker by increasing the weight of the rope itself. In skyscrapers, the rope may be heavier than the elevator cabin.

For reference, the elevator is a low-speed elevator moving to less than 45m / min, a normal speed elevator moving to 60 ~ 105m / min, a high-speed elevator moving to about 120 ~ 300m / min, and moving to about 360m / min or more It can be classified as a high speed elevator.

In fact, among the high-speed elevators installed in the Buzz Dubai Building, the rope weighs only 20 tons (t). In addition, the weight of the counterweight is added, which requires a great deal of power to accelerate the elevator at high speed. After all, the elevator, which is too heavy due to the rope, must be accelerated at a very high speed, and therefore the motor of the hoist must also be provided with a significantly larger capacity than a general motor.

In addition, when the rope is lengthened by several hundred meters or more, it becomes difficult to stop at the correct position because the length of the rope varies according to the degree of wear of the rope or the temperature change. Therefore, the characteristics of the wire rope become more difficult and the control method thereof becomes complicated.

Conventional screw-type elevators utilize a structure in which a long post that is threaded is erected and a sleeve corresponding to the nut is installed in the cabin. In a screw-type elevator, the cabin is moved up and down by rotating the prop, so that it is used in a small simple elevator or when the fluid is difficult to move.

* It is anticipated that a ropeless elevator will be used instead of a conventional rope elevator in a high-rise building of 100 floors or more. In this regard, US Patent No. 5234079 discloses an elevator using a linear motor. However, since these linear elevators move in the air without a rope, the safety device must be firmly tripled and tripled, and horizontal movement is possible because there is no physical contact. There are not many elements and it is very difficult to overcome.

The present invention provides a ropeless lifting apparatus using a worm driving unit, and provides a lifting apparatus capable of minimizing power consumption.

In addition, the present invention provides a lifting device that can simplify the structure, easy and inexpensive to manufacture, and facilitate the arrangement of internal components.

According to a preferred embodiment of the present invention for achieving the above object of the present invention, the lifting device is a worm driving unit which moves along the elevator lifting passage, the worm driving unit and the rotating shaft is arranged in parallel with the moving path of the cabin portion The worm support portion is provided in the lifting passage along the moving path of the cabin and includes a plurality of support teeth formed to correspond to the worm teeth of the worm drive unit at intervals of the teeth of the worm drive unit. Is provided and includes a second magnetic module for providing repulsive force or attraction to the first magnetic module when the power is applied, and a power connection for connecting the plurality of second magnetic module in common to all or some groups.

The worm drive unit may include a wormgear-shaped body, and the body of the worm drive unit may be engaged with and supported by worm supporting parts arranged at equal intervals to provide a force for lifting. The worm drive unit alone can provide sufficient force for lifting, and assuming that the support of the worm support is arranged at intervals of about 40 cm, the worm gear body is about 360 m / min suitable for high speed elevators at a rotational speed of about 900 rpm. Speed can be implemented sufficiently. Of course, the ultra high speed of 600 ~ 1500m / min can also be fully implemented.

Basically, the cabin part can be vertically moved by the interaction between the worm drive unit and the worm support unit, and a rope as in the prior art is not used. Therefore, it can overcome the inefficiency according to the rope weight even when used in a high-rise building, and can use energy efficiently because it does not have to move tens of tons of rope.

The support of the worm gear and the worm support of the worm gear body may be provided with a magnetic module, respectively, to provide mutual repulsion or attraction. The mutual drive or attraction between the first and second magnet modules acts to support the worm drive and the worm. An additional magnetically levitated contact can be made of low resistance contact. Worm of the worm gear body slides on the support by magnetic levitation so that it can move the cabin without noise or vibration, and can also increase the life of parts by preventing wear between parts. In addition, a conventional electromagnet may be used as the second magnet module, and a general permanent magnet or electromagnet may be used as the first magnet module.

The power connection part is provided to connect at least a part of the plurality of second magnetic modules in common, wherein the second magnet module is commonly connected, wherein all or part of the plurality of second magnetic modules are connected to the power connection part. It may be understood that the second magnetic module, which is electrically connected so that power can be supplied at the same time, is commonly connected as power is supplied through the power connection unit.

For example, the power connection unit may include a wire connecting the plurality of second magnetic modules in common. For example, the wires may be arranged spirally along the worm, and the plurality of second magnetic modules may be commonly connected to the wires in series or in parallel.

As another example, the power connection unit may include a plurality of wiring units that commonly connect the second magnetic modules arranged on the same line in a group along the up and down direction of the worm, among the plurality of second magnetic modules, and a plurality of wiring units. The power may be sequentially supplied in response to the rotation of the worm drive unit, and when the power is supplied to the wiring unit, the second magnetic module connected to the wiring unit may be operated at the same time. Therefore, since the magnetic field may be sequentially formed only on the portion of the tooth surface of the worm gear body (or the second magnetic module in the region where the repulsive force or attraction force can interact with the first magnetic module), the magnetic field may be sequentially formed. Consumption can be minimized.

The wiring unit can be arranged in various ways depending on the required conditions and design specifications. For example, the wiring unit may be disposed in a spiral shape along the worm, and may commonly connect the second magnetic module disposed on the same line along the vertical direction. As another example, the wiring unit may be disposed along the direction of the rotation axis of the worm driver, and may commonly connect the second magnet module disposed on the same line along the vertical direction.

As another example, the power connection unit may include a matrix circuit board provided along the outer circumference of the worm driving unit, and the plurality of second magnetic modules are commonly connected to the matrix circuit board to be independently controlled. Can be. In the method using the matrix circuit board, since the magnetic field may be sequentially formed only at a portion of the tooth surface of the worm gear body that is substantially supported by the worm support, power consumption can be minimized.

Since the lifting device of the present invention does not use a rope or a wire, it is possible to improve the inefficiency according to the huge weight of the rope, and a skyscraper or a high-speed elevator can expect a greater energy saving effect.

Further, according to the present invention, the first magnetic module and the second magnetic module are provided on the worm tooth and the worm support of the worm gear body, and the worm driving unit may be formed by mutual repulsion or attraction between the first magnetic module and the second magnetic module. Since the worm support can be contacted low-resistance in a magnetically levitated manner, it can lower power consumption, move the cabin without noise or vibration, and increase the life of the part by preventing wear between the parts.

In addition, according to the present invention, since the second magnet module can be commonly connected by the power connection unit, the structure of the worm driving unit can be simplified, and the arrangement of the internal parts can be facilitated.

In addition, according to the present invention, by allowing the magnetic field to be formed (power supply) on a portion of the tooth surface of the worm gear body that is substantially supported by the worm support body in response to the rotation of the worm gear body, unnecessary power consumption can be prevented. Power consumption can be minimized.

1 is a front view for explaining a lifting device according to the present invention.

2 is a view for explaining a lifting system using a lifting device according to the present invention.

Figure 3 is a lifting device according to the present invention, a view for explaining the structure of the worm drive and the worm support.

Figure 4 is a lifting device according to the present invention, a view for explaining an example of the power connection.

5 to 9 is a lifting device according to the present invention, a view for explaining another example of the power connection.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited or limited by the embodiments. For reference, in the present description, the same numbers refer to substantially the same elements, and may be described by quoting the contents described in other drawings under the above rules, and the contents repeated or deemed apparent to those skilled in the art may be omitted.

1 is a front view for explaining a lifting device according to the present invention, Figure 2 is a view for explaining a lifting system using a lifting device according to the present invention, Figure 3 is a lifting device according to the present invention, a worm drive unit and a worm support unit It is a figure for demonstrating the structure. In addition, Figure 4 is a lifting device according to the invention, a view for explaining an example of the power connection portion, Figures 5 to 9 is a lifting device according to the invention, a view for explaining another example of the power connection portion. .

1 to 3, the lifting device 100 includes a cabin unit 110, a lifting frame 120, a worm driving unit 130, and a worm support unit 170, and a cabin unit of the lifting device 100. 110 may move along the elevator lift passage in the building by the interaction between the worm drive 130 and the worm support 170. The lifting device 100 may further include an independent control unit 180, an air conditioner 185, a wireless communication module 190, and the like, and may smoothly drive and control the lifting device 100.

The worm driving unit 130 includes a worm gear body 140 having a wormgear shape. A worm tooth 142 is formed on an outer surface of the worm gear body 140. The worm gear body 140 includes a rotating shaft arranged in parallel with the traveling direction on the elevating device 100 and rotatably mounted about the rotating shaft.

In addition, the lifting passage is provided with a worm support portion 170 corresponding to the worm tooth 142 of the worm gear body 140, in this embodiment the worm support portion 170 is formed in a rack shape corresponding to the worm gear body 140 It can function as a rack supporting part.

Since the cabin unit 110 can be elevated using the worm drive unit 130, it does not use a conventional rope or wire, and there is no need to install a hoist or a machine room on the top floor. That is, using the worm driving unit 130 installed on the upper or lower portion of each compartment 110, it is possible to switch the rotation of the worm drive 130 to the vertical movement of the compartment 110 without depending on the rope. .

Therefore, the drive system of the elevating device 100 is simplified, and by eliminating the rope, it is possible to eliminate the burden on the weight of the huge rope when applied to the skyscraper. In addition, the structure can also remove the burden on the smooth movement of the rope and counterweight hypothesis.

In terms of efficiency, it rotates instead of friction, so that rotation can be converted into potential energy without substantially losing energy. On the contrary, when descending, desired speed and control can be performed with minimum energy. In the case of initial acceleration, the presently developed drive motor can provide sufficient maneuverability, and the initial control, low speed maintenance, high speed maintenance and deceleration can be easily performed through motor control.

In response to one rotation of the worm gear body 140, the pitch of the support value of the worm support part 170 may be moved. Therefore, assuming that the pitch of the worm support unit 170 is about 25 to 50 cm, the worm drive unit 130 can provide a sufficient speed of about 500 to 1000 m / min with only about 2000 rpm of rotation. That is, as shown on the left side, it is possible to easily implement the ultra-high speed elevator.

In addition, it is possible to easily implement a twin system in which two or more cabin units 110 can be moved in one lifting passage. Since no rope is used, two or more cabin units 110 may be freely arranged in the same space, and the elevator apparatus 100 is controlled by using the wireless communication module 190 mounted on the mutual cabin unit 110. Can be easily performed. In particular, since there are no obstacles in the elevating passage, the use of the wireless communication module 190 may be easier.

The elevating device 100 according to the present exemplary embodiment may prevent an accident in which the cabin unit 110 falls down by force even when a worst-case situation occurs in which power is cut off or the braking device is disabled. Due to the characteristics of the worm gear, even if it is descending, if the motor stops, the lowering of the motor can be smoothly decelerated, as well as physically stopped.Even if the lowering continues, the descending speed is maintained at a safe low speed. Can be protected safely.

The cabin 110 may be stably moved in the lifting passage by the lifting frame 120, and the lifting frame 120 may be guided to move without shaking in the lifting passage using the roller 124 located at the corner. have. In this embodiment, the worm drive unit 130 is mounted on the support frame 126, the room portion 110 and the lifting frame 120 may move together by the worm drive unit 130.

The worm driving unit 130 may mount (not shown) the drive motor and the transmission to the outside, but in the present embodiment, the worm gear body 140 may include a motor structure capable of generating a driving force therein. To this end, the worm gear body 140 may be provided in a hollow form, and both ends of the worm gear body 140 may be rotatably mounted using a bearing on a rotating shaft. In addition, it may include a stator 152 fixed to the rotating shaft for driving and a rotor 154 mounted on the inner surface of the worm gear body 140, the stator 152 and the rotor 154 of the magnet and coil Combinations, coils and coil combinations, and the like.

Referring to FIG. 3, the driving module provided in the worm gear body 140 may include two pairs of stators and rotors. To this end, the worm gear body 140 may also be provided in a hollow form. In the upper portion of the worm gear body 140, a coil stator 152 and a coil rotor 154 are provided as a coil-coil combination, and a coil stator 156 and a magnet rotor are provided as a coil-magnet combination. The former 158 may be provided. Of course, the coil rotor 154 may be provided in the form of an iron core instead of a coil, and the arrangement of the upper and lower parts may be changed.

By using two or more pairs of stators and rotors, the rotation torque and the rotation speed may be appropriately adjusted, and induction power generation due to the rotation of the worm gear body 140 may also be expected. For example, when the elevating device is lowered, power generation may be caused in the relative rotation of the stator and the rotor, and the energy may be efficiently used while repeating the elevating.

In addition, by adjusting the distance between the magnet and the coil, it is possible to control the cogging (cogging) phenomenon, in this case it may also function to reduce the rotation of the worm gear body 140 by using the cogging phenomenon when the power is cut off.

The worm gear 142 of the worm gear body 140 and the support tooth 172 of the worm support unit 170 may be provided with a magnet module, respectively, to provide mutual repulsive force or repulsive force.

Hereinafter, a plurality of second magnetic modules 220 are helically disposed along the worm 142, and the support 172 is provided with a first magnetic module 210, and a first magnetic module 210. By the mutual repulsive force acting between the second magnetic module 220 will be described with an example configured such that the worm driving unit 130 and the worm support unit 170 is a low resistance contact in a magnetic levitation method. In some cases, the electromagnet module may be arranged on the upper surface of the worm and the electromagnet module may be arranged on the bottom of the support to form a low resistance contact with each other. It is also possible to form a low resistance contact of the magnetic levitation method.

As shown, the worm drive unit 130 rotates the worm gear body 140 in the lifting device, the worm gear 142 of the worm gear body 140 is in close contact with each other by the repulsive force (or attraction force) with the worm support 170. It is possible to receive a force that can rise without rising, and as the sliding on the worm support portion 170 in accordance with the rotation of the worm support unit 170 may rise or descend as if sliding with the compartment 110.

In addition, an auxiliary roller (not shown) may be provided around the support value 172. The auxiliary roller may maintain an appropriate minimum distance between the electromagnet modules facing each other, and may prevent damage due to physical friction between the worm and the support when the worm driving unit rotates with the repulsive force (or the attraction force). .

A general electromagnet may be used as the second magnet module 220, and a general permanent magnet or electromagnet may be used as the first magnet module 210. Hereinafter, an example in which an electromagnet is used as both the first and

second magnet modules

210 and 220 will be described.

In addition, the worm 142 may be provided in a hollow form with an internal space, and the second magnetic module 220 may be disposed in the internal space of the worm 142. In some cases, the second magnetic module may be disposed on the bottom or the top of the warm tooth or may be formed on the surface of the warm tooth. A separate groove, hole or jaw may be formed, which fixes and supports the second magnetic module and prevents the second magnetic module from being separated by the centrifugal force as well as the wiring space for power supply. Of course, it is also possible to configure various shapes to be arranged inside the space.

The worm gear body 140 and the worm tooth 142 may be formed using a high-strength metal or a high strength synthetic resin, such as aluminum or magnesium, alloys thereof, and the materials and characteristics of the worm gear body 140 and the worm tooth 142 may be It may be changed according to the required conditions and design specifications. Of course, it can be made of low-weight iron and steel alloys, carbon nanotubes and composites thereof. In addition, in order to reinforce the strength of the worm tooth 142 formed in a hollow shape, a radial bulkhead (not shown) formed radially inside the worm tooth 142 may be formed. For this, a method such as die casting may be used.

The power connection unit is provided to commonly connect at least some of the plurality of second magnetic modules 220 described above. Here, the second magnetic module is connected in common, all or part of the plurality of second magnetic module is electrically connected so that the power can be supplied at the same time through the power connection, the power is supplied through the power connection Therefore, it can be understood that the commonly connected second magnetic modules can operate at the same time.

Referring to FIG. 4, the power connection unit may include a wire 222 for commonly connecting the plurality of second magnetic modules 220. For example, the wires 222 may be spirally disposed along the worm 142, and the plurality of second magnetic modules 220 may be commonly connected to the wires 222 in series or in parallel.

However, in a structure in which the plurality of second magnetic modules 220 are commonly connected by one wire 222, a magnetic field may be generated on all teeth of the worm gear body 140 as power is applied. Since the magnetic field is unnecessarily generated to the tooth surface portion that does not interact with the first magnet module 210 (repulsive force or attraction force), power consumption may be consumed more than necessary.

To prevent this, the magnetic field is sequentially applied only to a portion of the tooth surface of the worm gear body 140 that is substantially supported by the worm support unit 170 (or a second magnetic module in which mutual repulsion or attraction force can act on the first magnetic module). It can be configured to form.

For example, referring to FIGS. 5 and 6, the power connection unit commonly connects the second magnetic module 220 arranged in the same line along the vertical direction of the warming of the plurality of second magnetic modules 220 in a group. It may include a plurality of wiring units (222a, 222b, 222c). Power may be sequentially supplied to the plurality of

wiring units

222a, 222b, and 222c in response to the rotation of the worm driver. When the power is supplied to the

wiring units

222a, 222b and 222c, the

wiring units

222a and 222b may be supplied. The second magnetic module 220 commonly connected to, 222c may operate simultaneously. Here, the operation of the second magnetic module 220 means that the repulsive force (or attraction force) in the second magnetic module 220 corresponding to the first magnetic module 210 at the moment of close proximity according to the rotation of the worm driving unit 130. Can be understood as a state in which

The

wiring units

222a, 222b, and 222c may be arranged in various ways according to required conditions and design specifications. For example, referring to FIG. 5, the

wiring units

222a, 222b, and 222c may be spirally disposed along the worm 142, and the second magnetic module 220 disposed on the same line along the up and down direction may be formed. It may be commonly connected to the

wiring units

222a, 222b, and 222c.

In addition, a connection terminal 164 (or a switch, a relay, a brush, etc.) that can be sequentially connected to or disconnected from the power source according to the rotation of the worm gear body 140 is provided below each of the

wiring units

222a, 222b, and 222c. Can be provided. Accordingly, the groups of the second magnetic modules 220 commonly connected by the

wiring units

222a, 222b, and 222c may be vertically interlocked in sequence.

In addition, the connection terminal 164 connected to the power supply may be one or a plurality, and the angle to which the power is applied may also be variously changed, such as an angle of 10 to 30 to 40 degrees or less.

As another example, as shown in FIG. 7, the

wiring units

222a, 222b, and 222c may be disposed along the rotation axis direction of the worm driving unit 130, and the second magnetic module 220 is disposed on the same line along the vertical direction. ) May be commonly connected to the

wiring units

222a, 222b, and 222c. Similarly, a connection terminal 164 (or a switch, a relay, a brush, etc.) that can be sequentially connected to or disconnected from the power source according to the rotation of the worm gear 140 may be provided below the

wiring units

222a, 222b, and 222c. Can be. Of course, it can also be powered by a non-contact induction current method.

In addition, power may be partially supplied to the first magnetic module 210 provided to the support 172 in a manner similar to that of the second magnetic module 220. That is, power is not supplied to all the first magnet modules 210 provided at the support teeth in the lifting passages, but instead to the first magnet module 210 corresponding to a specific position (area where the worm teeth and the support teeth are located) where the lifting device is located. The power may be sequentially applied.

Meanwhile, as another example of the power connector, referring to FIGS. 8 and 9, the power connector may include a matrix circuit board 222 ′ provided along the outer circumference of the worm driver. The two second magnetic modules 220 may be commonly connected to the matrix circuit board 222 ′ and may be independently controlled.

As the matrix circuit board, a conventional matrix circuit board to which a matrix circuit capable of independently controlling a plurality of second magnetic modules may be applied may be used, and the present invention is not limited or limited by the type and characteristics of the matrix circuit board.

For example, the matrix circuit board 222 ′ may be bent in a substantially cylindrical shape and attached to an inner surface or an outer surface of the worm gear body 140, and the second magnetic module 220 may be common to the matrix circuit board 222 ′, respectively. Can be controlled independently.

On the other hand, the lifting device of the present invention can be formed on one wall surface of the building in a plane, it can be lifted up and down while maintaining the external view. In addition, the above-mentioned lifting frame 120 may use a guide (not shown) using magnetic levitation, and may transfer the cabin part 110 without shaking and shaking in the lifting passage by using the magnetic levitation.

In addition, in the present invention, a building may be understood as a concept including a connection structure connecting a building or a place, in addition to a general building, a tower, an apartment, and the like, and the elevation space is not limited to a closed space in the building, but partially. It can also include open spaces.

In addition, the cabin (car) is to support and protect the person or cargo, and transport, it can be provided in a state in which the space in the cabin is temporarily closed or partially open, the structure for transporting the cabin without shaking Or rails may also be provided.

As described above, although described with reference to the preferred embodiment of the present invention, those skilled in the art various modifications and variations of the present invention without departing from the spirit and scope of the invention described in the claims below I can understand that you can.

Claims

A cabin unit moving along the elevator hoistway;

A worm driving unit moving together with the cabin unit and having a rotating shaft arranged in parallel with a moving path of the cabin unit;

A worm support part provided in the elevation passage along the moving path of the cabin part and including a plurality of support values formed to correspond to the worm teeth of the worm drive part at intervals of the teeth of the worm drive part;

A first magnetic module provided at the support value;

A second magnet module is provided along the worm, and provides a repulsive force or attraction to the first magnet module when the power is applied; And

A power connection unit connecting the plurality of second magnetic modules to all or some groups in common;

Lift device comprising a.
The method of claim 1,

The power connection unit includes a plurality of wiring units for commonly connecting a second magnetic module arranged in the same line in the vertical direction of the worm teeth of the plurality of second magnetic modules in a group,

The plurality of wiring units are sequentially supplied with power in response to the rotation of the worm drive unit, and when the power is supplied to the wiring unit, the second magnetic module connected to the wiring unit operates simultaneously.
The method of claim 2,

And the wiring unit is disposed spirally along the worm, and the second magnetic module disposed on the same line in the vertical direction is commonly connected to the wiring unit.
The method of claim 2,

And the wiring unit is disposed along a rotation axis direction of the worm driving unit, and the second magnetic module disposed on the same line along the vertical direction is commonly connected to the wiring unit.
The method of claim 1,

The power connector includes a matrix circuit board provided along an outer circumference of the worm driver.

And the plurality of second magnetic modules are connected to the matrix circuit board in common and are independently controlled.
The method of claim 1,

The worm driving unit lifting device comprising a worm gear body for providing a tooth surface of the worm gear and a drive motor for rotating the worm gear body outside the worm gear body.
The method of claim 1,

The worm driving unit includes a worm gear body providing a tooth surface of the worm gear and a driving unit for rotating the worm gear body in the worm gear body.

The driving unit includes a stator mounted on the rotating shaft fixed to the cabin part and a rotor mounted on an inner surface of the worm gear body corresponding to the stator.

The worm gear body is lifting device, characterized in that for rotating around the rotating shaft by the interaction of the stator and the rotor.
The method of claim 1,

Lifting device, characterized in that the first magnet module is composed of a permanent magnet or an electromagnet.