Drive for a transport device, set of drives and method for driving a transport device

Patent metadata

Field	Value
Publication number	US-9790032-B2
Application number	US-201414765752-A
Country	US
Kind code	B2
Filing date	Feb 3, 2014
Priority date	Mar 14, 2013
Publication date	Oct 17, 2017
Grant date	Oct 17, 2017

Abstract

A drive for a transport device, such as a conveyor belt, the drive including an external rotor motor having a stator and a rotor, and a gear unit having a shaft and an input drive gear. A set of drives in which external rotor motors of different sizes, including stators of identical diameter and different heights with corresponding rotors, and/or gear units having different speed-increasing stages or speed-reducing stages, are provided. Also, a method for driving a transport device using the drive.

First claim

The invention claimed is:

1. A drive for a transport device said drive comprising:
an external rotor motor comprising a stator and a rotor,
a gear unit comprising a shaft and an input drive gear, wherein the shaft extends through the stator and up to the rotor, and
a double bearing provided in the gear unit, wherein the double bearing comprises two spaced-apart bearings being arranged along the longitudinal axis of the shaft within the gear unit,
the rotor being arranged on the shaft and being configured such that it is connectable to the shaft, in a form- and/or force-fit manner, by means of at least one of a group comprising a fitting key, a cone, and a fit,
the double bearing for the shaft being provided in the gear unit by making use of angular contact ball bearings, so as to ensure that forces of a brake will be taken up.

2. The drive according to claim 1 , wherein the external rotor motor and the gear unit are of modular construction.

3. The drive according to claim 1 , wherein the stator and the rotor are arranged in a motor housing.

4. The drive according to claim 3 , wherein the motor housing comprises an internal, circumferentially extending rubber-elastic ring.

5. The drive according to claim 1 , wherein the shaft is configured as a continuous component from the input gear in the gear unit up to the rotor.

6. The drive according to claim 1 , wherein the stator is centered centrally relative to the shaft by means of a conical contact surface.

7. The drive according to claim 1 , wherein the stator is centered centrally relative to the shaft by means of a centering sleeve and is fixed in position by means of screws.

8. The drive according to claim 7 , wherein outer surfaces of the drive do not have any upwardly directed, horizontal surfaces.

9. The drive according to claim 8 , wherein the rotor carries an iron ring, which establishes a magnetic circuit, the iron ring being at least one of a laminated sheet package or embedded in plastic.

10. The drive according to claim 9 , wherein permanent magnets are inserted in the laminated sheet package or in the plastic in a form-fit manner and are there secured in position.

11. The drive according to claim 10 , wherein the permanent magnets comprises one or more of a group comprising: hard ferrite, neodymium iron boron and aluminum nickel cobalt.

12. The drive according to claim 11 , wherein an adapter plate is provided between the gear unit and the external rotor motor, wherein the adapter plate comprises an adapter-plate shaft sealing ring.

13. The drive according to claim 12 , wherein the gear unit is open on a side facing the external rotor motor.

14. The drive according to claim 12 , wherein the gear unit is enclosed and a gear-unit shaft sealing ring is provided so as to seal the shaft.

15. The drive according to claim 14 , wherein a thread insert fixes the gear-unit shaft sealing ring in position.

16. The drive according to claim 14 , wherein the gear-unit shaft sealing ring runs on a hardened sleeve, which is applied to the shaft.

17. The drive according to claim 16 , wherein the gear unit does not have a vent screw.

18. The drive according to claim 17 , wherein the gear unit is configured such that it comprises one, two, three or more than three speed-increasing stages or speed-reducing stages.

19. The drive according to claim 18 , wherein a speed-increasing stage or speed-reducing stage is realized by one of interaction between two spur gears, interaction between a bevel gear and a spur gear, or by means of a planetary gearing.

20. The drive according to claim 19 , wherein the gear unit comprises a hollow shaft on the output side, the hollow shaft at least one of comprising stainless steel or having a surface finish.

21. The drive according to claim 20 , wherein the gear unit is configured for being oriented in four modes of orientation relative to the adapter plate and for connection to the adapter plate.

22. The drive according to claim 15 , wherein the adapter plate additionally includes a hole leading from an area between the adapter-plate shaft sealing ring and the gear-unit shaft sealing ring downwards at an oblique angle to the exterior of the adapter plate, said area being defined, when the adapter plate and the gear unit are connected to one another in a form-fit manner.

23. The drive according to claim 22 , wherein the hole is additionally provided with a sight glass on the exterior of the adapter plate.

24. The drive according to claim 23 , wherein the adapter plate additionally comprises at least one passage for electric connection wires.

25. The drive according to claim 24 , wherein the adapter plate comprises an external terminal board by means of which motor coils of the stator can be contacted.

26. The drive according to claim 25 , further comprising a brake arranged in linear alignment with the rotor and the shaft.

27. The drive according to claim 26 , the stator being arranged in a motor housing, wherein the brake is of a modular construction and is arranged in a cover of the motor housing.

28. The drive according to claim 27 , wherein the brake is secured in position in the cover, said cover serving as a torque support of the brake.

29. The drive according to claim 28 , wherein the brake comprises a brake disk arranged on one of an extended shaft or a rotor bell.

30. The drive according to claim 28 , wherein a rotor bell comprises a brake surface.

31. The drive according to claim 27 , wherein the cover comprises connection wires for a brake coil, which are configured such that, when the cover and the motor housing are connected in a form-fit manner, contacting will take place.

32. The drive according to claim 25 , further comprising a return stop.

33. A set of drives comprising drives according to claim 32 , wherein external rotor motors of different sizes, which comprise stators of identical diameter and different heights with corresponding rotors, and gear units having one of different speed-increasing stages or different speed-reducing stages, are provided.

34. The drive according to claim 1 , wherein the transport device is a conveyor belt.

35. The drive according to claim 1 , wherein the external rotor motor is not provided with a bearing for the shaft.

Assignees

• Krones Ag

Inventors

• Lautenschlager Franz
• Davidson Hartmut
• Hüttner Johann
• Seger Martin
• Kahl Reiner
• Vierheilig Johannes

Classifications

• B65G23/22 Primary

  Arrangements or mountings of driving motors {(B65G23/08 takes precedence)} · CPC title

• H02K7/085

  radially supporting the rotary shaft at only one end of the rotor (H02K7/086, H02K7/09 take precedence) · CPC title

• H02K5/15

  Mounting arrangements for bearing-shields or end plates · CPC title

• H02K1/2786

  Outer rotors · CPC title

• H02K7/14

  Structural association with mechanical loads, e.g. with hand-held machine tools or fans (with fan or impeller for cooling the machine H02K9/06) · CPC title