Winch
A non-limiting exemplary embodiment of a winch includes a bearing housing, a one way bearing having an outer ring attached to the bearing housing, a bearing hub having a cylindrical section attached to an inner ring of the one way bearing, a friction disk having a first surface adjacent a disc of the bearing hub, a crank spool having a first disk adjacent a second surface of the friction disk, a crank housing configured for rotatably retaining the crank spool, a crank shaft extending through the bearing hub, through the friction disk, and into the crank spool, wherein a first end of the crank shaft is coupled to the crank spool, and a crank mechanism coupled to a second end of the crank shaft.
1. A winch, comprising:
a bearing housing;
a one way bearing disposed within the bearing housing, the one way bearing comprising:
an inner ring; and
an outer ring attached to the bearing housing;
a bearing hub comprising:
a cylindrical section, wherein at least a portion of the cylindrical section is disposed within and attached to the inner ring of the one way bearing; and
a disk;
a friction disk comprising opposing first and second surfaces, wherein the first surface is adjacent the disk of the bearing hub;
a crank spool comprising opposing first and second disks, wherein the first disk is adjacent the second surface of the friction disk;
a crank housing configured for rotatably retaining the crank spool;
a crank shaft extending through the bearing hub, through the friction disk, and into the crank spool, wherein a first end of the crank shaft is coupled to the crank spool;
a crank mechanism coupled to a second end of the crank shaft; and
a knob secured to the crank spool configured to prevent the crank spool from rotating to decouple the crank mechanism from the crank shaft.
2. The winch of claim 1 , wherein when the crank mechanism is rotated in a first direction, the bearing hub, the friction disk and the crank spool are longitudinally displaced towards one another to form substantially frictionless interfaces between the bearing hub and the friction disk, and between the friction disk and the crank spool.
3. The winch of claim 2 , comprising a strap comprising:
a first end attached to the crank spool; and
a second end configured for attachment to a load.
4. The winch of claim 3 , wherein continued rotation of the crank mechanism in the first direction winds the strap onto the crank spool and the strap is subjected to tension by the load.
5. The winch of claim 4 , wherein the one way bearing inhibits the strap from unwinding when the crank mechanism is released while the strap is under tension.
6. The winch of claim 4 , wherein when the crank mechanism is rotated in a second direction opposite the first direction, the bearing hub, the friction disk and the crank spool are longitudinally displaced apart and the strap unwinds from the crank spool.
7. The winch of claim 6 , wherein the one way bearing inhibits the strap from unwinding when the crank mechanism is released while the strap is under tension.
8. The winch of claim 2 , wherein the crank spool is configured for being held stationary when the crank mechanism is rotated in a second direction opposite the first direction.
9. The winch of claim 8 , wherein the crank mechanism is rotatable in the second direction to substantially reduce friction between the friction disk and the crank spool.
10. The winch of claim 9 , wherein rotation of the crank spool is not hindered by the one way bearing.
11. The winch of claim 1 , wherein the crank mechanism comprises:
a handle mount;
a crank handle; and
a handle lock/release lever.
12. The winch of claim 11 , wherein
the handle mount is attached to the second end of the crank shaft; and
the crank handle is attached to the handle mount.
13. The winch of claim 11 , wherein the crank handle is removable.
14. The winch of claim 11 , wherein the handle mount and the crank handle are integrally formed.
15. The winch of claim 11 , wherein the crank handle comprises threads.
16. The winch of claim 1 , wherein the crank spool and the crank shaft are integrally formed.
17. The winch of claim 1 , comprising:
a first crank bearing disposed between the first disk of the crank spool and the crank housing; and
a second crank bearing disposed between the second disk of the crank spool and the crank housing.
18. A winch, comprising:
a bearing housing;
a one way bearing disposed within the bearing housing, the one way bearing comprising:
an inner ring; and
an outer ring coupled to the bearing housing;
a bearing hub comprising:
a cylindrical section, wherein at least a portion of the cylindrical section is disposed within and coupled to the inner ring of the one way bearing; and
a disk;
a crank spool comprising opposing first and second disks, wherein the first disk is adjacent the disk of the bearing hub;
a crank housing configured for rotatably retaining the crank spool;
a crank shaft extending through the bearing hub and into the crank spool, wherein a first end of the crank shaft is coupled to the crank spool;
a crank handle coupled to a second end of the crank shaft; and
a knob secured to the crank spool configured to prevent the crank spool from rotating.
19. The winch of claim 18 , wherein when the crank handle is rotated in a first direction, the bearing hub and the crank spool are longitudinally displaced towards each other to form a substantially frictionless interface therebetween.
20. The winch of claim 19 , comprising a strap comprising:
a first end attached to the crank spool; and
a second end attached to a load.
21. The winch of claim 20 , wherein continued rotation of the crank handle in the first direction winds the strap onto the crank spool and subjects the strap to tension by the load.
22. The winch of claim 21 , wherein the one way bearing inhibits the strap from unwinding when the crank handle is released.
23. The winch of claim 21 , wherein when the crank handle is rotated in a second direction opposite the first direction, the bearing hub and the crank spool are longitudinally displaced apart and the strap unwinds from the crank spool.
24. The winch of claim 19 , wherein the crank spool is configured for being held stationary when the crank handle is rotated in a second direction opposite the first direction.
25. The winch of claim 24 , wherein the crank handle is rotatable in the second direction to substantially reduce friction between the bearing hub and the crank spool.
26. The winch of claim 25 , wherein rotation of the crank spool is not hindered by the one way bearing.
27. The winch of claim 18 , wherein the crank handle is removable.
28. The winch of claim 18 , wherein the crank spool and the crank shaft are integrally formed.
29. The winch of claim 18 , comprising a friction disk disposed between the disk of the bearing hub and the first disk of the crank spool, wherein the disk of the bearing hub, the friction disk and the first disk of the crank spool are configured for minimal slippage therebetween when the crank shaft is rotated in a first direction.