Transport device and method for operating the transport device

Patent metadata

Field	Value
Publication number	US-9546053-B2
Application number	US-201414770106-A
Country	US
Kind code	B2
Filing date	Jan 3, 2014
Priority date	Feb 25, 2013
Publication date	Jan 17, 2017
Grant date	Jan 17, 2017

Abstract

The invention relates to a transport device ( 1 ) for conveying a product, comprising a stationary running rail ( 2 ) which extends along a longitudinal axis ( 3 ); a cart ( 6 ) with a height axis ( 5 ) which is perpendicular to the longitudinal axis ( 3 ), said cart being guided on the running rail ( 2 ); guiding rollers ( 7 ) which are arranged on the cart ( 6 ), can be rotated about rotational axes ( 8 ) perpendicular to the longitudinal axis ( 3 ), and roll on the running rail ( 2 ), wherein the rotational axis ( 8 ) of each guiding roller ( 7 ) intersects the same straight line ( 9 ), which is perpendicular to the longitudinal axis ( 3 ); and a compensating device for compensating for a yaw moment (M) of the cart ( 6 ) about the height axis ( 5 ), comprising multiple magnetic coils ( 12 ) arranged along the running rail ( 2 ), at least two ferromagnetic or permanent magnetic counter elements ( 11 ) which are arranged on the cart ( 6 ) and which are arranged on both sides of the running rail ( 2 ), and a control device ( 18 ) for controlling the magnetic coils ( 12 ) such that the counter elements ( 11 ) can be simultaneously pushed away from the running rail ( 2 ) in the direction of a transverse axis ( 4 ), said transverse axis ( 4 ) being defined as perpendicular to the longitudinal axis ( 3 ) and perpendicular to the height axis ( 5 ).

First claim

The invention claimed is:

1. A transport device ( 1 ) for conveying a product, comprising:
a stationary running rail ( 2 ) which extends along a longitudinal axis ( 3 );
a cart ( 6 ) with a height axis ( 5 ) which intersects and is perpendicular to the longitudinal axis ( 3 ), said cart being guided on the running rail ( 2 );
guiding rollers ( 7 ) which are arranged on the cart ( 6 ), are configured to be rotated about rotational axes ( 8 ) perpendicular to the longitudinal axis ( 3 ), and roll on the running rail ( 2 ), wherein a rotational axis ( 8 ) of each guiding roller ( 7 ) intersects the same straight line ( 9 ), which is perpendicular to the longitudinal axis ( 3 ); and
a compensating device for compensating for a yaw moment (M) of the cart ( 6 ) about the height axis ( 5 ), the compensating device comprising
multiple magnetic coils ( 12 ) arranged along the running rail ( 2 ),
at least two ferromagnetic or permanent magnetic counter elements ( 11 ) which are arranged on the cart ( 6 ) and which are arranged on both sides of the running rail ( 2 ), and
a control device ( 18 ) for controlling the magnetic coils ( 12 ) such that the counter elements ( 11 ) can be simultaneously pushed away from the running rail ( 2 ) in a direction of a transverse axis ( 4 ), said transverse axis ( 4 ) being defined as perpendicular to the longitudinal axis ( 3 ) and perpendicular to the height axis ( 5 ).

2. The transport device according to claim 1 , wherein a magnetic drive comprising stationary primary magnets and secondary magnets which are arranged on the cart ( 6 ) and interact with the primary magnets, wherein said secondary magnets are configured to be used only for the drive and the counter elements ( 11 ) are configured to be used only for the compensating device.

3. The transport device according to claim 2 , wherein the magnetic coils ( 12 ) of the compensating device are configured to be used as permanent magnets of the magnetic drive.

4. The transport device according to claim 2 , wherein distinct coils independent of the compensating device are implemented for the primary magnets.

5. The transport device according to claim 1 , wherein the counter elements ( 11 ) are disposed in a direction of the longitudinal axis ( 3 ) upstream and/or downstream of the straight line ( 9 ) which is intersected by the rotational axes ( 8 ) of the guiding rollers ( 7 ).

6. The transport device according to claim 1 , wherein the counter elements ( 11 ) are permanent magnets, wherein south poles ( 14 ) of the counter elements ( 11 ) are oriented towards the magnetic coils ( 12 ) on both sides of the running rail ( 2 ), or wherein north poles ( 13 ) of the counter elements ( 11 ) are oriented towards the magnetic coils ( 12 ) on both sides of the running rail ( 2 ).

7. The transport device according to claim 1 , wherein the counter elements ( 11 ) are permanent magnets, wherein a south pole ( 14 ) of the counter element ( 11 ) is oriented towards the magnetic coils ( 12 ) on one side of the running rail ( 2 ), and a north pole ( 13 ) of the counter element ( 11 ) is oriented towards the magnetic coils ( 12 ) on the other side of the running rail ( 2 ).

8. The transport device according to claim 1 , wherein the counter elements ( 11 ) are integrated into a ferromagnetic, U- or C-shaped return element ( 16 ) which engages around the running rail ( 2 ).

9. A method for operating the transport device according to claim 1 , the method comprising aligning the counter elements ( 11 ) such that the counter elements ( 11 ) are repelled by the magnetic coils ( 12 ).

10. The method according to claim 9 , wherein a magnetic drive comprising stationary primary magnets and secondary magnets which are arranged on the cart ( 6 ) and interact with the primary magnets, wherein said secondary magnets are configured to be used only for the drive and the counter elements ( 11 ) are configured to be used only for the compensating device, and the method further comprising, in order to drive the cart, energizing the primary magnets of the drive such that the counter elements ( 11 ) of the compensating device are attracted by the primary magnets.

11. The method according to claim 9 , wherein a magnetic drive comprising stationary primary magnets and secondary magnets which are arranged on the cart ( 6 ) and interact with the primary magnets, wherein said secondary magnets are configured to be used only for the drive and the counter elements ( 11 ) are configured to be used only for the compensating device, and the method further comprising, in order to drive the cart, energizing the primary magnets of the drive such that the secondary magnets of the drive are attracted by the primary magnets.

12. The method according to claim 11 , the method further comprising, in order to drive the cart, energizing the primary magnets of the drive such that the counter elements ( 11 ) of the compensating device are attracted by the primary magnets.

13. A method for operating the transport device according to claim 1 , wherein the method comprising energizing the magnetic coils ( 12 ) such that the counter elements ( 11 ) are repelled by the magnetic coils ( 12 ).

14. The method for operating the transport device according to claim 13 , wherein the method further comprising aligning the counter elements ( 11 ) such that the counter elements ( 11 ) are repelled by the magnetic coils ( 12 ).

15. The method according to claim 14 , wherein a magnetic drive comprising stationary primary magnets and secondary magnets which are arranged on the cart ( 6 ) and interact with the primary magnets, wherein said secondary magnets are configured to be used only for the drive and the counter elements ( 11 ) are configured to be used only for the compensating device, and the method further comprising, in order to drive the cart, energizing the primary magnets of the drive such that the counter elements ( 11 ) of the compensating device are attracted by the primary magnets.

16. The method according to claim 14 , wherein a magnetic drive comprising stationary primary magnets and secondary magnets which are arranged on the cart ( 6 ) and interact with the primary magnets, wherein said secondary magnets are configured to be used only for the drive and the counter elements ( 11 ) are configured to be used only for the compensating device, and the method further comprising, in order to drive the cart, energizing the primary magnets of the drive such that the secondary magnets of the drive are attracted by the primary magnets.

17. The method according to claim 16 , the method further comprising, in order to drive the cart, energizing the primary magnets of the drive such that the counter elements ( 11 ) of the compensating device are attracted by the primary magnets.

18. The method according to claim 13 , wherein a magnetic drive comprising stationary primary magnets and secondary magnets which are arranged on the cart ( 6 ) and interact with the primary magnets, wherein said secondary magnets are configured to be used only for the drive and the counter elements ( 11 ) are configured to be used only for the compensating device, and the method further comprising, in order to drive the cart, energizing the primary magnets of the drive such that the counter elements ( 11 ) of the compensating device are attracted by the primary magnets.

19. The method according to claim 13 , wherein a magnetic drive comprising stationary primary magnets and secondary magnets which are arranged on the cart ( 6 ) and interact with the primary magnets

Assignees

• Bosch Gmbh Robert

Inventors

• Hanisch Markus
• Van De Loecht Heinrich

Classifications

• B65G54/025 Primary

  the load being magnetically coupled with a piston-like driver moved within a tube · CPC title

• B65G54/02 Primary

  electrostatic, electric, or magnetic · CPC title