Off-set drive assembly for solar tracker

Patent metadata

Field	Value
Publication number	US-9766319-B2
Application number	US-201414489409-A
Country	US
Kind code	B2
Filing date	Sep 17, 2014
Priority date	Dec 10, 2012
Publication date	Sep 19, 2017
Grant date	Sep 19, 2017

Abstract

In an example, the present invention provides a solar tracker apparatus configured with an off-set drive assembly. In an example, the apparatus has an inner race structure, which has a cylindrical region coupled to a main body region, the main body comprising an off-set open region. The cylindrical region is an annular sleeve structure coupled to the main body region, which occupies the spatial region within the cylindrical region. In an example, the apparatus has an outer race structure coupled to enclose the inner race structure, configured to couple the inner race structure to allow the inner race structure to move in a rotational manner about a spatial arc region; and configured to allow the inner race structure to pivot about a region normal to a direction of the spatial arc region. In an example, the solar tracker has a clamp assembly that is configured to pivot a torque tube.

First claim

I claim:

1. A solar tracker apparatus, the apparatus comprising:
a inner race structure, the inner race structure comprising a cylindrical region coupled to a main body region, the main body comprising an off-set open region;
an outer race structure coupled to enclose the inner race structure, and configured to allow the inner race structure to move in a rotational manner about a spatial arc region; and configured to allow the inner race structure to pivot about a region normal to a direction of the spatial arc region;
a torque tube sleeve configured in an off-set manner on a region between a center region and an outer region of the inner race structure, and configured to be inserted within the off-set open region; and
a drive coupled to the inner race structure to cause the inner race structure to rotate within the outer race structure.

2. The apparatus of claim 1 wherein drive comprises a slew gear device, the slew gear device comprising a worm gear operably coupled to a portion of the inner race structure comprising a plurality of gears; and further comprising a flange structure configured and firmly attached around a periphery of the torque tube, flange having a plurality of openings, each of which can include a bolt that firmly engages the flange structure along with the torque tube to the inner race structure such that the inner race structure is firmly engaged and fixed in place with the torque tube, which rotates along with the inner race structure.

3. The apparatus of claim 1 wherein the outer race structure is configured from a rigid steel structure and shaped as an annular sleeve having a main hub region for a slew gear device and a support structure comprising a flat region for a pier structure.

4. The apparatus of claim 1 wherein the drive comprises a slew gear device that transfers torque for rotating the inner race structure from a first spatial region to a second spatial region and then from the first spatial region to the second spatial region in a rocking motion to track movement of a solar source.

5. The apparatus of claim 1 wherein the inner race structure is coupled to the outer race structure using a bearing or a bushing device to couple the inner race structure to the outer race structure for the radial movement.

6. The apparatus of claim 1 wherein the inner race comprises a plurality of gear structures; and further comprises a bearing assembly or a bushing assembly configured within an inner region of the gear structure.

7. The apparatus of claim 1 wherein the torque tube sleeve is configured with the region using a cylindrical bearing assembly to pivot the inner race structure with respect to the outer race structure.

8. The apparatus of claim 1 wherein the outer race structure comprises a main hub region configured in a perpendicular direction to a worm gear assembly; and further comprising a clamp member to sandwich the inner race structure between the clamp member and the outer race structure.

9. The apparatus of claim 1 wherein the outer race structure comprises a main hub region configured in a perpendicular direction to a worm gear assembly, the worm gear assembly being coupled to an electric motor drive.

10. The apparatus of claim 1 further comprising a torque tube coupled to the torque tube sleeve; and further comprising a plurality of solar panels configured on the torque tube.

11. A solar tracker apparatus, the apparatus comprising:
a inner race structure, the inner race structure comprising a cylindrical region coupled to a main body region, the main body comprising an off-set open region;
an outer race structure coupled to enclose the inner race structure, and configured to allow the inner race structure to move in a rotational manner about a spatial arc region; and configured to allow the inner race structure to pivot about a region normal to a direction of the spatial arc region;
a torque tube sleeve configured in an off-set manner on a region between a center region and an outer region of the inner race structure, and configured to be inserted within the off-set open region;
a cylindrical bearing assembly coupling the inner race structure to the outer race structure to facilitate movement about the spatial arc region and facilitate movement normal to the spatial arc region to pivot the inner race structure to allow each side of the torque tube sleeve to move about a spatial region defined by a conical region at any point about the spatial arc region; and
a drive coupled to the inner race structure to cause the inner race structure to rotate within the outer race structure.

12. The apparatus of claim 11 wherein drive comprises a slew gear device, the slew gear device comprising a worm gear operably coupled to a portion of the inner race structure comprising a plurality of gears.

13. The apparatus of claim 11 wherein the outer race structure is configured from a rigid steel structure and shaped as an annular sleeve having a main hub region for a slew gear device and a support structure comprising a flat region for a pier structure.

14. The apparatus of claim 11 wherein the drive comprises a slew gear device that transfers torque for rotating the inner race structure from a first spatial region to a second spatial region and then from the first spatial region to the second spatial region in a rocking motion to track movement of a solar source.

15. The apparatus of claim 11 wherein the inner race comprises a plurality of gear structures; and wherein the outer race structure comprises a main hub region configured in a perpendicular direction to a worm gear assembly; and further comprising a clamp member to sandwich the inner race structure between the clamp member and the outer race structure.

16. The apparatus of claim 11 wherein the outer race structure comprises a main hub region configured in a perpendicular direction to a worm gear assembly, the worm gear assembly being coupled to an electric motor drive.

17. The apparatus of claim 11 further comprising a torque tube coupled to the torque tube sleeve; and further comprising a plurality of solar panels configured on the torque tube.

Assignees

• Nextracker Inc

Inventors

• Au Alexander W

Classifications

• Y02E10/47

  Mountings or tracking · CPC title

• F16C25/02

  Sliding-contact bearings · CPC title

• H02S20/32

  specially adapted for solar tracking · CPC title

• F16C23/10

  Bearings, parts of which are eccentrically adjustable with respect to each other · CPC title

• G01S3/7861 Primary

  Solar tracking systems · CPC title