Belt tensioning system and belt tensioning method

Patent metadata

Field	Value
Publication number	US-11041548-B2
Application number	US-201816058832-A
Country	US
Kind code	B2
Filing date	Aug 8, 2018
Priority date	Aug 8, 2018
Publication date	Jun 22, 2021
Grant date	Jun 22, 2021

Abstract

A belt tensioning system includes a stretch belt rotationally connected to a crankshaft pulley and an accessory pulley, and a tensioning device including a pivoting arm having a tensioning pulley coupled thereto and an arm stop positioned in a path of the pivoting arm to limit the rotation of the pivoting arm. Additionally, the tensioning device does not include a spring tensioner and is configurable in a tensioned configuration and an un-tensioned configuration.

First claim

The invention claimed is:

1. A belt tensioning system comprising:
a stretch belt rotationally connected to a crankshaft pulley and an accessory pulley; and
a tensioning device including a pivoting arm having a tensioning pulley coupled thereto and an arm stop positioned in a path of the pivoting arm to limit rotation of the pivoting arm, the arm stop comprising a removably coupled stop plate, wherein the stop plate has an outer surface in direct face sharing contact with a side of the pivoting arm when the tensioning device is in a tensioned configuration;
the tensioning device not including a spring tensioner and being configurable in both the tensioned and an un-tensioned configuration.

2. The belt tensioning system of claim 1 , where when the pivoting arm is in the tensioned configuration the tensioning pulley is in rotational contact with the stretch belt and exerting tension thereon.

3. The belt tensioning system of claim 1 , where when the pivoting arm is in the un-tensioned configuration the tensioning pulley is spaced away from the stretch belt.

4. The belt tensioning system of claim 1 , where the pivoting arm includes an attachment apparatus positioned at a pivoting interface of the pivoting arm.

5. The belt tensioning system of claim 4 , where the attachment apparatus in the pivoting arm includes a plurality of planar faces.

6. The belt tensioning system of claim 4 , where tightening of the attachment apparatus beyond a threshold value prevents rotation of the pivoting arm and loosening the attachment apparatus beyond a threshold value permits rotation of the pivoting arm.

7. The belt tensioning system of claim 1 , where the stop plate is removably coupled via an attachment apparatus that is removably attached to the stop plate.

8. The belt tensioning system of claim 7 , where the attachment apparatus in the arm stop includes a plurality of planar faces.

9. The belt tensioning system of claim 1 , where the pivoting arm and the arm stop are coupled to a front engine cover.

10. The belt tensioning system of claim 1 , where when the pivoting arm is in the tensioned configuration a side of the pivoting arm is in face sharing contact with an outer surface of the arm stop.

11. The belt tensioning system of claim 1 , where the arm stop has a continuous uninterrupted shape.

12. The belt tensioning system of claim 1 , where the path of the tensioning pulley is an arc that varies an amount of tension the tensioning pulley exerted on the stretch belt.

13. The belt tensioning system of claim 1 , where the accessory pulley is connected a water pump, an alternator, a power steering pump, or an air conditioning pump.

14. A belt tensioning system in an engine, comprising:
a stretch belt rotationally connected to a crankshaft pulley and an accessory pulley; and
a tensioning device including a pivoting arm having a tensioning pulley coupled thereto and an arm stop positioned in a rotational path of the pivoting arm to limit rotation of the pivoting arm, the arm stop comprising a removably coupled stop plate, wherein the stop plate has an outer surface in direct face sharing contact with a side of the pivoting arm when the tensioning device is in a tensioned configuration;
where the tensioning device does not include a spring tensioner;
where when the pivoting arm is in the tensioned configuration the tensioning pulley is in rotational contact with the stretch belt and exerting tension thereon; and
where when the pivoting arm is in an un-tensioned configuration the tensioning pulley is spaced away from the stretch belt.

15. The belt tensioning system of claim 14 , where the stop plate is removably coupled via an attachment apparatus, and where the attachment apparatus is removably attached to the stop plate.

16. The belt tensioning system of claim 15 , where the pivoting arm includes an attachment apparatus positioned at a pivoting interface of the pivoting arm and where tightening of the attachment apparatus beyond a threshold value prevents rotation of the pivoting arm and loosening the attachment apparatus beyond a threshold value permits rotation of the pivoting arm.

17. The bolt tensioning system of claim 15 , where the stop plate of the arm stop is removably coupled an engine cover via the attachment apparatus.

18. The bolt tensioning system of claim 17 , where the attachment apparatus engages with a boss extending from the engine cover.

19. The bolt tensioning system of claim 7 , where the stop plate of the arm stop is removably coupled to an engine cover via the attachment apparatus.

20. The bolt tensioning system of claim 1 , further comprising a boss positioned between the stop plate and an engine cover.

Assignees

• Ford Global Tech Llc

Inventors

• Willis Scott
• Barber Kwan Jamal
• Basile James

Classifications

• F16H2007/0882

  the tension being a function of temperature · CPC title

• F16H7/12

  of an idle pulley · CPC title

• F16H7/08 Primary

  Means for varying tension of belts, ropes or chains  (pulleys of adjustable construction F16H55/52) · CPC title

• F16H7/1281 Primary

  where the axis of the pulley moves along a substantially circular path · CPC title

• F16H2007/0893

  Circular path · CPC title