Press drive device for a press, and press comprising a press drive device

Patent metadata

Field	Value
Publication number	US-10696000-B2
Application number	US-201515520705-A
Country	US
Kind code	B2
Filing date	Oct 8, 2015
Priority date	Oct 20, 2014
Publication date	Jun 30, 2020
Grant date	Jun 30, 2020

Abstract

A press drive device ( 21 ) includes a connecting rod ( 49 ) with input ( 48 ) and output ends ( 50 ). A drive shaft ( 35 ) is mounted to be rotatable about a shaft axis W and includes a connecting rod bearing ( 46 ) that is eccentric in relation to the shaft axis W. A drive unit ( 77 ) includes a driving motor ( 30 ) and a planetary gear set ( 76 ) to drive the drive shaft ( 35 ). A gear output ( 79 ) connects to the drive shaft ( 35 ), and a gear input ( 78 ) connects to a motor shaft ( 73 ). The driving motor ( 30 ) includes a rotor ( 66 ) connected in a rotationally fixed manner to the motor shaft ( 73 ) via a rotor hub ( 67 ). The rotor ( 66 ) is concentric to the motor shaft creating mounting space between the motor shaft ( 73 ) and the rotor ( 66 ) and designed to arrange a braking device ( 31 ) therein.

First claim

The invention claimed is:

1. A press drive device for a press, the press drive device comprising:
a connecting rod that has a driving end and a driven end,
a drive shaft that can be rotated about a shaft axis and has a connecting rod bearing arranged eccentrically opposite the shaft axis, said connecting rod bearing supporting the driving end of the connecting rod,
at least one drive housing that has a peripheral wall extending in peripheral direction around the shaft axis and/or extending coaxially with respect to the shaft axis, wherein at least one of the at least one drive housing is associated with a driving motor that comprises a stator and a hollow cylindrical rotor,
a rotor hub connected to a motor shaft in a rotationally fixed manner and to which is mounted the rotor,
at least one planetary gear set that comprises a gear input connected to the motor shaft in a rotationally fixed manner and a gear output connected to the drive shaft in a rotationally fixed manner, and that is arranged in one of the at least one drive housing,
a motor shaft bearing mechanism of at least one of the at least one drive housing, wherein the motor shaft, the rotor, and the rotor hub are only supported by the motor shaft bearing mechanism,
wherein the motor shaft bearing mechanism is disposed between the motor shaft and the at least one drive housing,
wherein the rotor and the rotor hub are supported on the motor shaft and are only indirectly supported at the housing via the motor shaft and the motor shaft bearing mechanism,
wherein a mounting space exists radially between the motor shaft and the rotor and axially adjacent to the rotor hub, said mounting space being configured to allow mounting a braking device in the at least one drive housing.

2. The press drive device according to claim 1 , wherein the gear input is a sun wheel of the at least one planetary gear set.

3. The press drive device according to claim 2 , wherein the sun wheel ( 81 ) is directly connected to the motor shaft in a rotationally fixed manner.

4. The press drive device according to claim 1 , wherein the gear output is a planetary wheel carrier of the at least one planetary gear set.

5. The press drive device according to claim 1 , wherein the gear output is coupled via a coupling arrangement to the drive shaft in a rotationally fixed manner, wherein the coupling arrangement allows a relative movement radially with respect to the shaft axis between the drive shaft and the gear output.

6. The press drive device according to claim 1 , wherein, at a first bearing location, there is provided a first bearing mechanism that supports the drive shaft on a first bearing part, and that, at a second bearing location, there is provided a second bearing mechanism that supports the drive shaft on a second bearing part, wherein the first bearing location and the second bearing location are arranged on axially different sides of the connecting rod bearing.

7. The press drive device according to claim 6 , wherein the first bearing part with the first bearing location is a component of the first drive housing and/or that the second bearing part with the second bearing location is a component of a second drive housing.

8. The press drive device according to claim 6 , wherein one of the first bearing mechanism or the second bearing mechanism forms a fixed bearing, and an other of the first bearing mechanism or the second bearing mechanism forms a movable bearing.

9. The press drive device according to claim 1 , wherein one of the at least one planetary gear set and the driving motor form a drive unit that is arranged in a common one of the at least one drive housing.

10. The press drive device according to claim 1 , wherein the mounting space for the braking device is located axially between the motor shaft bearing mechanism and the rotor hub.

11. The press drive device according to claim 1 , wherein the rotor hub comprises a disk extending radially with respect to the shaft axis or comprises spokes extending radially with respect to the shaft axis.

12. The press drive device according to claim 1 , wherein the rotor hub comprises a hollow shaft that encloses the motor shaft and is connected to the motor shaft in a rotationally fixed manner.

13. The press drive device according to claim 1 , further comprising the braking device arranged in at least one of the at least one drive housing.

14. The press drive device according to claim 1 , wherein, in at least one of the at least one drive housing, there are arranged the driving motor, as well as the braking device, the braking device being arranged axially adjacent to the rotor hub and arranged at least partially in a space between the rotor and the shaft axis.

15. A press comprising:
a press frame on which a ram is supported so as to be movably guided in a stroke direction,
at least one toggle lever mechanism that comprises a first toggle lever and a second toggle lever which are connected to each other by a hinge connection, wherein the first toggle lever is hinged to the press frame and the second toggle lever is hinged to the ram at a pressure point,
and at least one press drive device comprising:
a connecting rod that has a driving end and a driven end,
a drive shaft that can be rotated about a shaft axis and has a connecting rod bearing arranged eccentrically opposite the shaft axis, said connecting rod bearing supporting the driving end of the connecting rod,
at least one drive housing that has a peripheral wall extending in peripheral direction around the shaft axis and/or extending coaxially with respect to the shaft axis, wherein at least one of the at least one drive housing is associated with a driving motor that comprises a stator and a hollow cylindrical rotor,
a rotor hub connected to a motor shaft in a rotationally fixed manner and to which is mounted the rotor,
at least one planetary gear set that comprises a gear input connected to the motor shaft in a rotationally fixed manner and a gear output connected to the drive shaft in a rotationally fixed manner, and that is arranged in one of the at least one drive housing,
a motor shaft bearing mechanism of at least one of the at least one drive housing, wherein the motor shaft, the rotor, and the rotor hub are only supported by the motor shaft bearing mechanism, wherein the motor shaft bearing mechanism is disposed between the motor shaft and the at least one drive housing, wherein the rotor and the rotor hub are supported on the motor shaft and are only indirectly supported at the housing via the motor shaft and the motor shaft bearing mechanism, wherein a mounting space exists radially between the motor shaft and the rotor and axially adjacent to the rotor hub, said mounting space configured to allow mounting a braking device in the at least one drive housing,

wherein the driven end of the connecting rod is connected to the hinge connection.

16. The press according to claim 15 , further comprising two press drive devices of the at least one press drive device, each of said drives being movably coupled with the ram via one toggle lever mechanism, respectively.

17. The press according to claim 15 , further comprising a first and/or a second drive housing of the at least one press drive device defining a housing interior, in which the driving motor and/or the braking device are arranged, wherein the housing interior is arranged within an outside contour of the press frame.

Assignees

• Schuler Pressen Gmbh

Inventors

• Kosse Marcus

Classifications

• B30B1/266

  Drive systems for the cam, eccentric or crank axis · CPC title

• B30B1/14 Primary

  operated by cams, eccentrics, or cranks · CPC title

• B30B1/26

  by cams, eccentrics, or cranks · CPC title