JPH10127010A - Small drive device for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain a small structural shape, high integration, and free utilization of an installation place, and meet all safety requirements of a drive device for elevators by disposing a reduction gear and a motor on a common axis within the cylindrical part of a bellmouth driving pulley. SOLUTION: A driving pulley 1 is connected to a driving power taking-out hub 19 with a fastening screw 30, which is connected to a reduction gear 15 in order so as to be capable of operating with connecting pins 14. The driving pulley 1 is fitted in a rotatable condition within a transmission housing 16 by a driving pulley bearing 7 together with a driving power taking-out hub 19. A motor comprises a rotor body 8, which surrounds the transmission housing 16 and holds a rotor laminated board 9 with a squirrel-cage winding wire 10. A stator comprises a stator laminated board 12, and a stator winding wire 11, and is disposed on the inner wall of a motor housing 3 facing the rotors 8, 9, 10 in their diametrical direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small drive for an elevator comprising a motor, a brake drive, a mounting part, a transmission and a drive pulley.

[0002]

2. Description of the Prior Art A typical elevator drive comprises a series of drive components having a pedestal in which a drive pulley, a transmission, a brake and a motor are arranged in sequence and are often screwed to a base plate. It has the following structure. However, this structure requires a large space, which limits the layout possibilities and directly and indirectly leads to higher costs.

[0003] By nesting the components together,
2. Description of the Related Art Elevator driving devices capable of reducing the volume are known. To this end, the cavities that still exist are used and the components of the drive system are integrated into them. Such a cavity is in the drive pulley and can be created by a suitable structure of the drive pulley.

An example of the above kind is disclosed in DE 42 33 759. No transmission with reduced structural volume (transmission-fre
e) The elevator drive has a common housing for the external rotor motor and the internal shoe brake, and at the same time the housing is configured as a drive pulley.

Another example of reducing the structural volume of an elevator drive is disclosed in US Pat. No. 5,010,981. Here, the planetary gears are arranged in drive pulleys mounted on both sides. Brake and motor are driven by pulleys and bearing blocks
blocks).

[0006] The two current examples described above show a fundamental solution for reducing the volume of an elevator drive by means of a telescopic arrangement of drive components. But,
Some further needs remain unfulfilled for optimal miniature elevator drives and compatibility with specifications.

[0007]

SUMMARY OF THE INVENTION The present invention is directed to an elevator driving apparatus which has a small structural shape, a high degree of integration, can be used freely in an installation place, and satisfies all the safety requirements of an elevator driving apparatus. Present a new solution to the problem of providing.

[0008]

This object is achieved by the invention characterized in claim 1 and described and illustrated in the drawings and illustrated.

[0009] In particular, the present invention relates to a method wherein the reduction gear and the motor are:
It is characterized in that it is arranged on a common axis in the cylindrical part of the bell-shaped drive pulley.

[0010] Advantageous developments and improvements are set out in the dependent claims.

The brake can preferably be released electromagnetically by means of a manual release lever, and the steering wheel can be fixed or plugged in, both of which are arranged on the rear wall of the motor housing.

The motor is a polyphase cage rotor motor, the rotor having a cage winding and the stator having a polyphase winding.

The motor can also be implemented as a synchronous motor, in which case the rotor is fitted with permanent magnets.

A double-layer parallel pin transmission is provided as the transmission, and the two contact positions are arranged so as to be shifted from each other by 180 °.

The radial load of the drive pulley is mainly carried by a single high load bearing in a cross roller configuration.

The motor shaft can be arbitrarily extended and has a second shaft end at the end surface of the drive pulley for inserting into a handwheel or mounting an accessory meter such as a tachometer.

The free circular annular surface of the rear wall of the housing allows for a universal mounting that is deformed by the application of mounting holes.

The rear wall of the housing is embodied such that at least one side projects beyond the motor housing,
Configured as an integral fitting.

Cooling of the motor is ensured by cooling holes in the free circular annular surface, and additional cooling blowers are incorporated as needed.

The present invention will be described in more detail below and illustrated in the drawings by way of example embodiments.

[0021]

FIG. 1 shows a bell-shaped drive pulley 1 provided with a cable groove 2 as seen from the outside of an elevator drive device. The drive pulley 1 has the same diameter as the fixed motor housing 3, which housing is adjacent to and closed by a rear wall 4 of the motor housing via a small gap. The brake 5 is preferably a known electromagnetically actuated spring pressure brake, which protrudes to the right from the rear wall of the motor housing and has a drive shaft 4.
1 and arranged coaxially. The brake 5 is manually released by a manual release lever 13. The end of the shaft 25 is coaxial with the drive shaft 41 and protrudes rightward from the center of the brake 5 to the extent that the handle wheel 5 can be inserted into the shaft end. The shaft 25 can optionally be implemented so as to penetrate the entire drive, with the second shaft end 42 protruding from the center of the drive pulley 1 and being inserted into the handwheel 6 on the drive pulley side, for example. An attached meter such as a tachometer can be attached.

The basic components of an elevator drive are only briefly described at first, but are shown in a partial section in FIG. Further details will be apparent from the following description with reference to FIGS.

The driving pulley 1 is driven by a tightening screw 30 to take out a driving force.
19, which in turn is operatively connected to the reduction gear 15 by means of a connecting pin 14. The transmission housing 16 together with the transmission front cover 18 forms a front closure of the motor housing on the left side. The transmission housing 16 is closed on the right side by a transmission rear wall 17. The drive pulley 1 is rotatably mounted in the transmission housing 16 by a drive pulley bearing 7 together with a drive power take-out hub 19, and the drive pulley bearing 7 is functionally, for example, a cross-roller bearing or the like. As a high-load bearing. The motor is the rotor body 8
, Which partially surrounds the transmission housing 16 and carries the rotor laminate 9 with a cage winding 10. The stator includes a stator laminated plate 12 and a stator winding 11, and is disposed on the inner wall of the motor housing 3 that faces the rotors 8, 9, and 10 in the radial direction.

In FIG. 2, the details of the elevator drive are shown in cross section, so that the interrelationship and function can be recognized. Each component in this drive device can be functionally classified into the following categories.

Fixed parts. Parts that rotate at the rotation speed of the motor. Transmission parts. Parts that rotate at a reduced rotation speed. The fixed parts are the rear wall 4 of the motor housing already described.
Motor housing 3, transmission housing 1
6. The rear wall 17 of the transmission housing and the front cover 18 of the transmission.

Each component that rotates at the rotational speed of the motor is a hub 44 fixed to the motor shaft 25 on the right side and carrying the rotor body 8 together with the rotor laminate 9 and the rotor cage winding 10.

Counted as transmission components are a motor shaft 25 or a first eccentric wheel 28 and a second eccentric wheel 29, which are a first shaft bearing 26 and a second shaft bearing on the motor shaft 25. It is formed between the bearings 27 and is arranged at 180 ° to each other. The two eccentrics 28 and 29 carry a first roller bearing 31 on the first eccentric 28 and a second roller bearing 32 on the second eccentric 29. The first planetary gear (p
lane wheel 22 and second planetary gear 2
3 are eccentric rings 28 and 29 and roller bearings 31, respectively.
32 engages the internal teeth 21 of the transmission housing 16 via the individual teeth 34. The teeth 34 of the planetary gears are the inner teeth 21 of the transmission housing 16.
Fewer teeth.

The planetary gears 22 and 23 shown in FIG. 3 have coupling holes 33 (FIG. 2) arranged in a circle, in which the connecting pins 14 provided with the support rollers 24 engage. These connecting pins 14 and the support roller 24
It penetrates both coupling holes 33 of 2 and 23. The coupling pin 14 is entrained by the coupling holes 33 and the support rollers 24 to the rotating planetary gears 22, 23 to form a mechanical drive for the reduction gear 15. It is connected to the drive pulley 1 either directly in this function or by a drive take-off hub 19. Planetary gears 22, 2
The diameter of the coupling hole 33 at 3 is larger than the diameter of the support roller 24 by twice the amount of eccentricity of the eccentric wheels 28, 29, so that the reduction gear 15 runs without boring and there is no unnecessary play.

The reduced rotation speed of the connecting pin 14, the coupling hub 19 and the drive pulley 1 is due to the difference in the number of teeth between the planetary gears 22, 23 and the internal teeth 21 of the transmission housing 16, and The number of teeth 34 is smaller than the number of internal teeth 21 of the transmission housing 16. The conversion ratio is calculated by dividing the number of teeth of the internal teeth 21 by the difference in the number of teeth. The planetary gears 22 and 23 themselves also rotate in opposite rotational directions due to the difference in the number of teeth based on the rotation of the motor shaft, and together with the connecting pin 1 having the support roller 24.
4. The driving force take-out hub 19 and the driving pulley 1 also rotate clearly. With this type of transmission, very high conversion ratios can be achieved in a small space.
Two layers of transmission 15 (two-layer)
Of the transmission housing 16 creates two points of application of the drive force output force on the internal teeth 21, which are arranged at 180 °, thus leading to a favorable load distribution for operation and service life.

The main loads of the elevator parts are supported and moved in shafts (cars, counterweights, cables) and carried by drive pulley bearings 7, where, apart from radial and axial forces, chipping The moment is also taken out. The drive pulley bearing 7 is configured as a high-load bearing and comprises rollers arranged in a cross and set at an angle so that not only radial loads but also very large axial loads are possible in both directions. is there.

The reduction gear 15 is a completely bell-shaped drive pulley 1
, The motor is arranged substantially inside. In the example shown (FIG. 1), only a small portion of the multi-phase winding 11 protrudes from the right winding end and slightly exceeds the contour of the drive pulley 1. According to the individual dimensions of the stator windings, this can completely fall within the profile of the drive pulley. When implementing a synchronous motor instead of a polyphase motor, the rotor has permanent magnets and the stator has salient poles and pole windings.
indices).

A more compact configuration mode of the elevator drive according to the invention provides for the construction of a drum brake, as in FIG. In this case, the steering wheel flange 38
A brake drum 37 with is arranged on the shaft end on the outside. The brake mounting itself consists of a brake lever bearing 35, which is fixed to the rear wall 4 of the motor on both sides of the brake drum 37, each carrying a brake lever 36 with a brake shoe 39. The two brake levers 36 are actuated by an actuator 40 against spring force. It is preferable to use an electromagnet as a driving device of the actuator 40.

FIG. 5 shows a disc brake, which is combined with an elevator drive as a third variant of the brake configuration. A brake disc 46 is fixed to the motor shaft 25, and engages with a brake stirrup type actuator 40 from above. The schematic diagram of the actuator 40 leaves the possibility that it can be operated electromagnetically or with hydraulic fluid. In both modes of operation, the moment of the brake is generated by a static spring force. The actuator acts as an opening action for this spring force. In this brake configuration mode, a manual release lever 13 is also provided.

FIG. 6 shows a free circular annular surface 43 as described herein, particularly for mounting an elevator drive at the rear wall 4 of the motor housing. The mounting hole 49 can have a screw, according to the particular form of the coupling technique, for fastening a mounting fixture, not shown. The number and arrangement of the mounting holes 49 is determined by the existing structure and other conditions of the elevator installation. Depending on the particular installation location and mode, a flat, bent or specially shaped metal profile with an integrated vibration damper is used.
In addition, there is a vent opening 48 in the circular annular surface 43 for circulating air to cool the motor and the transmission, in the form of a large hole in the example. The shape, number and arrangement of the ventilation openings 48 is determined by the amount of cooling air required, which is determined by the (energy) dissipation loss of the motor, the efficiency of the transmission and the ambient temperature. By installing a blower, independent forced air cooling may be realized. The rear wall 4 of the motor housing can itself be implemented directly as a mounting fixture, wherein the rear wall 4 of the motor housing projects at least on one side ahead of the motor housing 3,
It has a mounting hole in a protruding part according to each installation location and installation mode, and has an end part of an appropriate shape.

In the layout of the elevator drive, apart from the small configuration mode, the ease of operation for evacuating a passenger trapped in a failed elevator is of great value. Regardless of the installation location and the installation mode, both types of brakes can be actuated by the manual release lever 13 from both sides as viewed from the axial direction, so that in some cases directly from the brake side and in other cases Can be activated by a drive pulley. If the manually actuated brake can only be released from the drive pulley side, a shaft end 42 is provided on the drive pulley side for temporarily attaching the handle wheel 6 as described above. .

The illustrated embodiment of the elevator drive according to the invention carries a load of 2,000 kilograms and has a maximum traveling speed of 2.5 meters / second. For smaller conveying capacities, the drive can be correspondingly lighter and smaller, e.g. with less cable grooves, smaller diameters, shorter axial structural lengths, etc. can do.

The drive preferably comprises a conventional polyphase squirrel-cage armature motor, so that conventional frequency and amplitude adjustment electronics can be used for current supply and commutation.

If a synchronous motor is to be realized, the necessary current supply and control electronics are likewise used.

Further, when the transmission ratio is smaller than this, a planetary gear is convenient, and it is preferably a single stage. Although the internal teeth 21 of the transmission housing 16 are not changed in principle, a sun gear is mounted on the motor shaft 25 instead of the eccentric wheels 28 and 29, and the connecting pin 14 simultaneously serves as an axis of the planetary gear.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional overall view of a driving device.

FIG. 2 is an overall sectional view of a driving device.

FIG. 3 is a cross-sectional view taken along the line AA.

FIG. 4 Assembly with handle wheel (built-on)
This is an elevator driving device having a shoe brake.

FIG. 5 is an elevator drive having an assembled shoe brake.

FIG. 6 is a diagram of the elevator driving device as viewed from a brake side.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drive pulley 2 Cable groove 3 Motor housing 4 Rear wall of motor housing 5 Brake 6 Handle wheel 8 Rotor main body 9 Rotor laminated board 10 Rotor cage shaped winding 11 Stator winding 12 Stator laminated board 13 Manual release lever 15 Reduction Gear 16 Transmission Housing 21 Internal Gear 22 First Planetary Gear 23 Second Planetary Gear 25 Motor Shaft 37 Brake Drum 38 Handle Wheel Flange 39 Brake Shoe 40 Actuator 42 Second Shaft End 48 Vent Opening 49 Mounting Hole

Claims (10)

[Claims] 1. A reduction gear (1) comprising a motor, a brake, mounting parts, a transmission and a drive pulley.
5) A miniature drive for an elevator, wherein the motor (8, 9, 10, 11) is arranged in a cylindrical cavity of a drive pulley (1) formed in a bell shape and provided with a cable groove (2). 2. The compact drive according to claim 1, wherein the drive has a brake (5) with a manual release lever (13) outside the cavity of the drive pulley (1). 3. The compact drive according to claim 1, wherein the drive has a shaft end of a motor shaft on the brake side for inserting a handwheel. 4. The compact drive as claimed in claim 1, wherein the motor shaft is extended so as to have a second shaft end on the drive pulley side. 5. The squirrel-cage winding (10) wherein the rotor (8, 9) is
2. The compact drive according to claim 1, wherein the motor comprises a multi-phase squirrel-cage rotor motor having a stator and a multi-phase winding having a multi-phase winding. 6. The compact drive as claimed in claim 1, wherein a synchronous motor having a rotor with a permanent magnet and a stator with shaped poles with pole windings is included as a motor. apparatus. 7. The transmission (15) is provided with a two-layer parallel pin transmission and has two contact points or transmission housing (16).
2. The small drive device according to claim 1, wherein the engagement positions of the internal teeth (21) with the planetary gears (22, 23) are arranged so as to be shifted from each other by 180 °. 3. 8. The rear wall (4) of the motor housing has a mounting hole (49) for a mounting fixture and a ventilation opening (48) for cooling the motor and the transmission. The small drive device according to claim 1. 9. The motor housing according to claim 9, wherein the rear wall of the motor housing protrudes beyond at least one side of the motor housing, the protruding part being configured as a mounting fixture. Small drive. 10. A shoe brake (3) as a brake.
7, 38, 39, 40), and the brake drum (37) can be used as a steering wheel (38).
The miniature drive of claim 1 having an edge having a larger diameter.