WO2006094494A1

WO2006094494A1 - Gearless and small-sized hoist drive in an external rotor embodiment

Info

Publication number: WO2006094494A1
Application number: PCT/DE2006/000425
Authority: WO
Inventors: Georg-Friedrich Blocher
Original assignee: Georg-Friedrich Blocher
Priority date: 2005-03-10
Filing date: 2006-03-09
Publication date: 2006-09-14
Also published as: DE102005011020A1

Abstract

The aim of said invention is to develop a hoist drive which is small-sized and whose structural design makes it possible to repeatedly use identical components and to remove yet necessary typical electrotechnical components and to increase the service life of the hoist drive. The inventive gearless external rotor small-sized hoist drive is preferably embodied a form of a symmetrical structure. The external rotor (1) consists of a driving tube (2) and angle tubular elements (3) fixed thereto. Said angle tubular elements (3) are embraced by two main bearings (4) which are held by a bearing supporting ring (5), respectively. Each bearing supporting ring (5) is connected to a base (6) of the hoist drive. The stator (7) of the electric motor and the axis (6) thereof are fixedly connected to a bearing cover (9) on one side. Said bearing cover (9) is linked to associated bearing supporting ring (5). The axis (5) of the stator is mounted on an internal end plate (10), which is connected to the angle tubular element (3) associated with the driving tube (2). An external end plate (11) parallel to the internal end plate (10) is fixed to the external surface of the bearing supporting ring (5).

Description

Gearless and compact hoist drive in external rotor design

Gearless and compact hoist drive in external rotor design with an electric motor, one

Traction sheave and brakes especially for passenger and goods lifts.

The prior art in the field of hoist drives is determined by compact and gearless external rotor motors, wherein the external rotor simultaneously forms the traction sheave. In DE 4222759 a gearless and compact hoist drive is described, the traction sheave, external rotor of the electric motor and the brake form a common housing. The external rotor of the electric motor is arranged inside the traction sheave. The traction sheave and the brake are mounted as a common housing at least at two points on a torque-free axis. The advantage of this solution is in addition to the gearless version in the torque-free axis.

In DE 199 10 925 a further gearless and compact hoist drive is described which consists of a roller-shaped carrier unit, is arranged on the outer circumference of the stator of the electric motor and on one side has a circular groove for receiving a mounted in this groove with the inner traction sheave , wherein the traction sheave is formed annularly with walls arranged at right angles to the inner and outer circumference of the annulus and the outer wall on the inner circumference

External rotor of the electric motor and on the outer circumference carries the cable grooves and the outer wall of the traction sheave comprises a total of the stator of the electric motor, wherein between the external rotor of the electric motor and the stator of the electric motor, a typical electric machine air gap is arranged. DE 299 19 957.6 U1 already describes the use of permanent magnets as excitation in electric elevator drives.

The invention is based on the object, a

To create hoist drive, which is still smaller in size than previously held and by its constructive solution allows the multiple use of the same components and the elimination of previously necessary components typical electromaschinenbautischer and increases the life of the hoist drive.

The advantages achieved by the invention are, in particular, that in addition to the already mentioned in the task advantages in the production of the hoist drive material savings,

Working time savings and a significant leap in quality in terms of mileage and noise reduction can be achieved. The symmetrical design requires fewer tools and can produce a larger number of identical parts, resulting in a cost reduction in the manufacture of these parts. Furthermore, the replacement of roller bearing is made possible by ball bearings by the chosen construction with a larger diameter support, which is also a

Reduced costs and improved smoothness. By the Außenumfassung the large main bearing through the bearing retaining rings stray, destroying bearing currents are avoided. The stand is fixed with ball bearings and / or with the torsionally rigid cover, thus the torque is absorbed torsionally stiff. The positioning during assembly is solved by the non-existent design overdetermination especially when omitting the bearing plate very easy. Due to the structural design of the storage is still defined, independent of the production tolerances and thus results in an accurate prediction of the life of the storage. The torsionally stiff but flexible soft cover as attachment the stator axle avoids a constructive overdetermination. The load does not act in this case on the stator axis. The torque and the load are introduced and received in the embodiment according to the invention in two separate components. Through this separation, the flexible soft cover can be used. Overall, it can be stated that the design according to the invention is less susceptible to tolerances, which represents a significant advantage in the assembly and manufacture of the hoist drive. The cable outlet from the inside of the machine, unlike other external rotor machines is not through the axis. The cable is guided safely through the inner and outer end plate and on to the terminal box. Compared to the cable guide through the axis of the machine can occur here no damage to the cable or during assembly. In addition, in the embodiment according to the invention at any time a visual control of the cable guide and a significant time savings during assembly possible. Another decisive advantage over previously common embodiments of hoist drives results from the possible by the construction simple cooling air flow. The support cover and the end plates may have closable openings for the cooling air duct and the stator corresponding cooling channels or an air guide along the air gap. By air cooling without additional supporting air ducting units such as fans, etc., a jump type to the smaller size of the machine can be realized with the same load capacity.

Advantageous embodiments of the hoist drive resulting from the independent claim and the dependent claims 3 to 12. According to claim 3, the driving tube of the hoist drive is mounted at both ends directly on the main bearings. The main bearings are supported by support rings, which are attached to the cover or on the outer end plate or are part of these components. This design is a significant reduction in the components reached. In the development according to claim 4, the cover is torsionally rigid and bendable executed. As a result, a constructive over-determination is avoided. In the development according to claim 5, the support cover is designed as an annular disc and connected to a support ring which rests on a Winkelrohrstück, wherein the Winkelrohrstück forms the connection to the foundation. This embodiment serves to reduce the use of materials. According to claim 6, the support cover and the associated bearing retaining ring, the outer end plate and the likewise associated bearing retaining ring, the Winkelrohrstück and the support ring or the Z-shaped ring each consist of one piece. This could be desirable in special cases and z. B. consist of a casting. Mounting a sensor is almost always desirable for today's applications. The

Attachment to the outer, fixed end plate with a connection to the inner, rotating end plate according to claim 7 easily, safely and easily possible. The connection can also be made via a encoder linkage. To increase the cooling capacity can according to the embodiment of claim 8 of the cover, the inner and outer end plate ventilation openings, which can be designed to be closed, have. The laminated core of the stand can have conventional ventilation ducts. According to claim 9 additional ventilation openings in the drive pipe or in

Have elbow pipe piece in front of the main bearing on the side of the inner end plate. These measures and other constructive details allow a jump in performance to a smaller size. The otherwise usual and expensive cable guide through the stator axis out of the machine can be done safely through the structural design according to claim 10 on the cover. According to claim 11, the Brake or brakes, as a disc or drum brake, the hoist drive between the inner and outer end plate to be arranged. Although this somewhat lengthens the machine, it increases the compactness. In the development according to claim 12, the rope grooves of the traction sheave surface hardened, z. B. by a flame spraying process.

Several embodiments of the invention will be explained in more detail with reference to the drawing. Show it:

Fig. 1 shows the basic structure of the hoist drive in

Section with a two-sided arrangement of the main bearing next to the traction sheave and an additional bearing of the external rotor on the axis of the stator, Fig. 2 shows the basic structure of the hoist drive in

Section with a two-sided arrangement of the main bearing under the traction sheave and an additional, one-sided support on the axis of the stator, Fig. 3 shows the section through a hoist drive with the two-sided arrangement of the main bearing next to the traction sheave and an additional, one-sided support on the axis of the stator and

Fig. 4 shows the section through a hoist drive with the two-sided arrangement of the main bearing once under the traction sheave and next to the traction sheave and an additional, one-sided support on the axis of the stator.

The gearless and compact hoist drive in external rotor design is mainly symmetrically constructed in the main variant in its mechanical structure. Of the

External rotor 1 consists of a driving tube 2 with incorporated on the outer circumference of the rope grooves or other propellant and arranged on the inner circumference of permanent magnets. At Both ends of the drive tube 2 are Winkelrohrstücke 3 attached. These angle pipe sections 3 comprise the two main bearings 4 on two sides, that is, the main bearing 4 is in the angle of the elbow pipe piece 3. Both main bearings 4 are held by a respective bearing support ring 5 located around the main bearing 4. The main bearings 4 may be ball bearings in the embodiment according to the invention. As a result, costs can be saved and smoothness can be increased. Each bearing retainer ring 5 has a connection to the foundation 6 of the hoist drive. The stator 7 of the electric motor with its axis 8 is fixedly connected on one side with a carrying lid 9. This cover 9 is torsionally stiff, but designed to be bendable and thereby avoids a constructive overdetermination. The support cover 9 has a connection to the associated bearing support ring 5. The axis 8 of the stator is mounted on the other side in an inner end plate 10. This end plate 10 is connected to the associated Winkelrohrstück 3 of the driving tube 2. Parallel to the inner end plate 10, an outer, fixed end plate 11 is arranged, which is fixed to the outside of the bearing retainer ring 5.

On the outer, fixed end plate 11, an encoder 12 with a connection to the inner, rotating end plate 10 can be easily, safely and easily attached.

The otherwise usual in external rotor constructions cable guides through the axis 8 of the stand can here more easily and safely on the support cover 9 to the terminal box by a cable gland 22, which can be used at the same time as a ventilation opening, take place. Opposite the cable guide through the axis of the machine No damage to the cable or cables can occur during installation. Strong bending loads of the cables are not necessary here. In addition, in the embodiment according to the invention at any time a visual control of the cable guide and a significant time savings during assembly is given.

To increase the ventilation performance 9 vent openings 13 and / or in or next to the driving tube 2 are provided in the inner end plate 10 and outer end plate 11 and in the cover. The usual in electrical engineering

Ventilation channels through the laminated core of the stand, additional cooling effects are possible. These vents 13 can also be closed, z. B. by cover or sheets, designed.

In a variant of the hoist drive, the axis 8 of the stand on the side of the support cover 9 is used as the bearing seat of a bearing 14. This bearing 14 carries a bearing plate 15, which in turn abuts the Winkelrohrstück 3 and is fixed there.

In a further variant of the hoist drive, the traction sheave 2 is supported on both sides directly under the traction sheave 2 by the main bearings 4. For this purpose, a support ring 20 is also provided on the support cover 9 on the inside and on the outer end plate 11 also on the inside as a bearing seat. On the opposite side of the rotationally fixed, but rigid attachment of the axle 8, an additional support of the traction sheave 2 via an inner end plate 10 is provided on a bearing 17 on the axis 8. The encoder 12 of the hoist drive is connected via a transmitter linkage 21 with the end plate 10. The Ventilation of the hoist drive takes place z. B. in the following way, through ventilation openings 13 in the support cover 9 through and around the stator 7, further through ventilation openings 13 of the inner end plate 10 and through ventilation holes 13 in the support ring 20 in the open.

Further embodiments of the hoist drive result from the arrangement of the main bearing 4. In Fig. 3, the arrangement of the main bearing 4 is shown in addition to the traction sheave 2. The hoist drive has on the drive tube 2 on one side a z-shaped in section ring 18, which forms the storage of the main bearing 4. The one leg of the Z-shaped ring 18 is fixed to the driving tube 2 and the other leg carries the main bearing 4. The opposite side of the bearing of this main bearing 4 is realized by an outer bearing retainer ring 5. This outer bearing retainer ring 5 has a connection to the foundation 6 of the hoist drive. The stator 7 of the electric motor with its axis 8 is held on this side by an inner bearing 17. The opposite side of the bearing 17 is formed by the Z-shaped ring 18. The axle 8 is fixedly connected to the bearing 17 on the opposite side from the bearing 17. This support cover 9 has a connection to an outer angle piece of pipe 16 or pipe section 16, which the second main bearing 4 in conjunction with an attached to the drive tube 2 inner

Elbow pipe 19 carries, wherein the outer elbow pipe piece 16 or pipe section 16 has a connection to the foundation 6.

In the last variant, shown in Fig. 4, the main bearing 4 is located on the side of the support plate 9 under the

Traction sheave 2 and on the opposite side next to the traction sheave 2. The main bearing 4 is on the side of Support plate 9 held by a support ring 20 at Winkelrohstück 16. On the other hand, the bearing with the main bearing 4 is formed by the Z-shaped ring 18 and by the outer bearing retainer ring 5.

Preferably, the brake 23 or the brakes 23 are arranged at the vertex of the traction sheave 2. In order to achieve a further compactness of the hoist drive, the brake 23 of the drive can be arranged between the inner end plate 10 and the outer end plate 11. The brake 23 can be designed here as a disc brake or drum brake.

Compilation of the reference numerals

1 - external rotor, traction sheave

2 - Driven pipe 3 - inner elbow pipe piece

4 - main warehouse

5 - bearing retainer

6 - foundation

7 - Stand 8 - Stand axis

9 - carrying lid

10 - inner end plate

11 - outer end plate

12 - Encoder 13 - Ventilation openings

14 - bearings

15 - bearing plate

16 - outer elbow pipe piece

17 - inner bearing 18 - z-shaped ring

19 - inner elbow pipe piece

20 - support ring

21 - encoder linkage

22 - Cable gland 23 - Brake

Claims

Claims:

1. Gearless and compact hoist drive in external rotor design with an electric motor, a

Traction sheave and brakes especially for personal and

Freight lifts characterized by the following features:

- That the hoist drive in its mechanical structure is constructed predominantly symmetrical, the external rotor

(I) from a drive tube (2) with permanent magnets arranged on the inside and at both ends of the drive tube (2) attached thereto, inner Winkelrohrstücken

(3) and these inner elbow pipe pieces (3) comprise the two main bearings (4) on two sides,

- That the two main bearings (4) by a respective bearing around the main bearing (4) bearing holding ring (5) are held and each bearing retainer (5) has a connection to the foundation (6) of the hoist drive, - that the stator (7) of the electric motor with its axis (8) on one side fixed to a carrying lid (9) is connected and on this side the axis (8) of the stator (7) has a bearing

(14) carries with a bearing plate (15), wherein the bearing plate

(15) is connected to the angle pipe piece (3) of the driving pipe (2) and the support cover (9) has a connection to the associated bearing support ring (5) and the axis (8) of the stator on the other side in an inner end plate (10 ) is mounted, which is connected to the associated inner Winkelrohrstück (3) of the drive tube (2) and parallel to the inner end plate (10) has an outer end plate

(II) is arranged, which is attached to the outside of the bearing retainer ring (5).

2. Gearless and compact hoist drive in external rotor design with an electric motor, a traction sheave and brakes especially for passenger and goods lifts, characterized by the following features:

that the hoist drive is constructed in its mechanical structure is not symmetrical, wherein the external rotor (1) consists of a drive tube (2) with arranged on the inside of permanent magnets and on one side the end of the

Drift tube (2) with a sectionally z-shaped ring (18) forms the bearing of the main bearing (4), wherein one leg of the z-shaped ring (18) on the driving tube (2) is fixed and the other leg, the main bearing (4 ) carries this side and the opposite side of the bearing of this main bearing (4) by an outer bearing retainer (5) is realized and this outer bearing retainer (5) has a connection to the foundation (6) of the hoist drive and that the stator (7) of the electric motor with its axis (8) is held on this side by an inner bearing (17) which is held by the Z-shaped ring (18) and

- That the axis (8) on the opposite side of the bearing (17) fixedly connected to a support cover (9) and this support cover (9) has a connection to an outer elbow pipe piece (16) or pipe piece (16), which is the second Main bearing (4) in conjunction with an attached to the drive tube (2) inner Winkelrohrstüσk (19), wherein the outer angle pipe piece (16) or pipe section (16) has a connection to the foundation (6).

3. Hoist drive according to claim 1, characterized in that the drive tube (2) is supported on both sides by a main bearing (4) and the main bearings (4) are each supported by a support ring (20), the support ring (20) bearing on the fixed side of the axle (8) fixed connection to the cover (9) and the support ring (20) on the opposite side has a fixed connection to the outer end plate (11).

4. hoist drive according to one of the preceding claims, d a d u r c h e k e n e z e i c h e n e that the support cover (9) is designed to be torsionally rigid and pliable.

5. hoist drive according to one of the preceding claims, characterized in that the support cover (9) is connected as an annular disc with the outer pipe piece (16) and the pipe piece (16) on the inside as a support ring (20) for the main bearing (4) is executed , wherein the support cover (9) only a torsionally stiff but flexible connection between the axis (8) and the outer tube piece (16) and the support ring (20) carries the inside of the main bearing (4) and the outside of the main bearing (4) Traction sheave (2) carries.

6. hoist drive according to one of the preceding claims, characterized in that the support cover (9) and the bearing retainer ring (5) or the outer end plate (11) and the bearing retainer ring (5) or the Winkelrohrstück (16) or pipe piece (16) and the support ring (20) or the Z-shaped ring (18) each consists of one piece.

7. Hoist drive according to one of the preceding claims, characterized in that the outer end plate (11) carries a transmitter (12) which is connected to the inner end plate (10) via a Gebergestänge (21).

8. hoist drive according to one of the preceding claims, d a d u r c h e c e in n e c e s that ventilation openings (13), which may be designed to be closed, and the laminated core of the stator ventilation ducts have the cover (9) and the inner end plate (10) and the outer end plate (11).

9. hoist drive according to one of the preceding claims, characterized in that additional ventilation openings (13) in the drive tube (2) and in the angle pipe piece (3) in front of the main bearing (4) on the side of the inner end plate (10) are provided, wherein the elbow pipe piece ( 3) has a much larger bearing seat on this side and thus there is a gap between angle pipe piece (3) and main bearing (4).

10. Lifting device drive according to one of the preceding claims, d a d u r c h e c e n e c e s in that the cable guide (22) from the stator (7) of the electric motor to the terminal box through the support cover (9) is guided.

11. hoist drive according to one of the preceding claims, characterized in that between the inner end plate (10) and the outer end plate (11) one or more brakes (23) are arranged.

12. hoist drive according to one of the preceding claims, d a d u r c h e k e n e c i n e in that the rope grooves of the traction sheave are surface hardened.