Right angle mechanical actuator for tensioner

Patent metadata

Field	Value
Publication number	US-11512762-B2
Application number	US-202016910734-A
Country	US
Kind code	B2
Filing date	Jun 24, 2020
Priority date	May 21, 2018
Publication date	Nov 29, 2022
Grant date	Nov 29, 2022

Abstract

An actuator for transmitting an input force in a first direction from an input mechanism to a force in a second direction at an output mechanism. The actuator may be incorporated into a tensioner for tensioning a belt. The device includes a plurality of aligned spherical elements in a curved raceway. The input mechanism transmits force to a first of the series of spherical elements. The spherical elements are substantially incompressible so that the series of spherical elements transmits the force along the curved raceway from the input mechanism to the output mechanism.

First claim

What is claimed is:

1. A tensioner for a belt assembly having a belt entrained around a plurality of rotatable elements, wherein the tensioner comprises:
a housing;
a raceway formed within the housing wherein the raceway comprises a first portion extending in a first direction and a second portion extending in a second direction wherein the first direction is transverse the second direction;
a plurality of spherical elements disposed in the first and second portions of the raceway, wherein the raceway has a width and the diameter of the spherical elements is approximately the same as the width of the raceway so that the spherical elements are serially aligned within the raceway;
an input mechanism in operable engagement with a first of the spherical elements in the first portion of the raceway, wherein the input mechanism is configured to drive the first spherical element in the first direction;
an output mechanism configured to be operably connected with one of the rotatable elements of the belt assembly such that displacement of the output mechanism is operable to adjust tension in the belt;
wherein the output mechanism is operably connected with a second of the spherical elements in the second portion of the raceway;
wherein the input mechanism is configured such that operating the input mechanism drives the first ball in the first direction which displaces the second ball in the second direction, which drives the output mechanism in the second direction thereby displacing the one rotatable element to adjust the tension in the belt.

2. The tensioner of claim 1 comprising a releasable lock configured to lock the output mechanism in place to impede displacement of the output mechanism against displacement in the second direction.

3. The tensioner of claim 1 wherein the output mechanism comprises a plunger having a first portion disposed within the second portion of the raceway and a second portion extending out of the raceway.

4. The tensioner of claim 1 wherein the output mechanism is a linearly displaceable plunger.

5. The tensioner of claim 1 wherein the raceway comprises a curved pathway that includes the first and second portions.

6. The tensioner of claim 1 wherein the raceway comprises a channel having sidewalls for retaining the spherical elements.

7. The tensioner of claim 1 wherein the input mechanism is threadedly connected with the housing so that rotating the input mechanism in a first rotation direction displaces the first spherical element in the first direction.

8. The tensioner of claim 1 wherein the spherical elements are ball bearings.

9. The tensioner of claim 1 wherein the spherical elements are substantially incompressible.

10. The tensioner of claim 1 wherein the spherical elements are formed of metal.

11. A mechanical actuator for applying a linear output force, comprising:
a housing;
a raceway formed within the housing wherein the raceway comprises a first portion extending in a first direction and a second portion extending in a second direction wherein the first direction is transverse the second direction;
a plurality of spherical elements disposed in the first and second portions of the raceway, wherein the raceway has a width and the diameter of the spherical elements is approximately the same as the width of the raceway so that the spherical elements are serially aligned within the raceway;
an input mechanism in operable engagement with a first of the spherical elements in the first portion of the raceway, wherein the input mechanism is configured to drive the first spherical element in the first direction;
an output mechanism configured to be operably connected with one of the rotatable elements of a belt assembly such that displacement of the output mechanism is operable to adjust tension in the belt assembly;
mechanism is operably engaged with a second of the spherical elements wherein the output in the second portion of the raceway;
wherein input mechanism is configured such that operating the input mechanism to drive the first ball in the first direction displaces the second ball in the second direction, which drives the output mechanism in the second direction to provide a linear output force.

12. The mechanical actuator of claim 11 comprising a releasable lock configured to lock the output mechanism in place to impede displacement of the output mechanism against displacement in the second direction.

13. The mechanical actuator of claim 11 wherein the output mechanism comprises a plunger having a first portion disposed within the second portion of the raceway and a second portion extending out of the raceway.

14. The mechanical actuator of claim 11 wherein the output mechanism is a linearly displaceable plunger.

15. The mechanical actuator of claim 11 wherein the raceway comprises a curved pathway that includes the first and second portions.

16. The mechanical actuator of claim 11 wherein the raceway comprises a channel having sidewalls for retaining the spherical elements.

17. The mechanical actuator of claim 11 wherein the input mechanism is threadedly connected with the housing so that rotating the input mechanism in a first rotation direction displaces the first spherical element in the first direction.

18. The mechanical actuator of claim 11 wherein the spherical elements are ball bearings.

19. The mechanical actuator of claim 11 wherein the spherical elements are substantially incompressible.

20. The mechanical actuator of claim 11 wherein the spherical elements are formed of metal.

Assignees

• Opex Corp

Inventors

• O'Mara Kerry

Classifications

• F16H25/183

  conveying only reciprocating motion, e.g. wedges · CPC title

• F16H2007/0842

  Mounting or support of tensioner · CPC title

• F16H2007/0895

  Internal to external direction · CPC title

• B65G23/44 Primary

  Belt or chain tensioning arrangements · CPC title

• F16H7/08 Primary

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