Bushing system for power transmission products
View Patent ↗A system is provided for securing two ends of a rotating member, such as a shaft, with respect to a non-rotating member, such as a mounting hub. Inner and outer sleeves have tapered surfaces and are positioned about the rotating member and provided within a bore of the non-rotating member. The tapered surfaces of the inner and outer sleeves cooperate in securing the shaft within the bore. The one or more inner sleeves collectively provide two threaded extensions for engagement with two nuts. Further, the one or more outer sleeves aggregately include two extensions, each having an annular groove to accommodate a lip formed in the nut. The system is engaged and disengaged through the interaction of the various tapered surfaces and the nuts, caused by the directional rotation of the nuts.
1. A system for securing a shaft within a hollow member, comprising:
an outer sleeve comprising an outer surface configured to mount against an inner surface of a hollow member and first and second ends, wherein each of the first and second ends of the outer sleeve comprises a tapered inner surface, a generally cylindrical extension, and a concentric lip formed on the extension;
first and second inner sleeves, each inner sleeve comprising a tapered outer surface configured to interface with the tapered inner surface of a respective one of the first and second ends of the outer sleeve, an inner surface configured to interface with a shaft, and a threaded extension;
a first locking member comprising a threaded inner section configured to mate with the threaded extension of the first inner sleeve, and an eccentric aperture forming a varying depth inner groove configured to mate with the concentric lip of the first end of the outer sleeve; and
a second locking member comprising a threaded inner section configured to mate with the threaded extension of the second inner sleeve, and an eccentric aperture forming a varying depth inner groove configured to mate with the concentric lip of the second end of the outer sleeve.
2. The system of claim 1 , further comprising the hollow member.
3. The system of claim 1 , wherein the hollow member comprises a mounting hub.
4. The system of claim 1 , wherein the concentric lip of each of the first and second ends of the outer sleeve is defined by an annular groove formed within the extension of the respective first and second ends of the outer sleeve.
5. The system of claim 4 , wherein the first locking member abuts a distal face of the first end of the outer sleeve for engagement with the threaded extension of the first inner sleeve for drawing the first inner sleeve into engagement with the first end of the outer sleeve between the hollow member and the shaft.
6. The system of claim 5 , wherein a lateral wall of the inner groove of the first locking member abuts the lip of the first end of the outer sleeve to urge the first end of the outer sleeve out of engagement with the first inner sleeve and the hollow member.
7. The system of claim 1 , wherein the eccentric aperture of the first locking member is of larger diameter than an outer diameter of the lip of the first end of the outer sleeve.
8. The system of claim 7 , wherein the groove formed by the eccentric aperture of the first locking member varies in depth from a maximal depth to substantially flush with the central aperture.
9. The system of claim 1 , comprising a further lip on the first end of the outer sleeve that inhibits movement of the first locking member into contact with the hollow member.
10. A system for assembly and disassembly of an outer member and shaft, the system comprising:
a shaft;
an outer member configured for mounting about the shaft;
an outer sleeve having first and second ends, each of the first and second ends having a tapered inner surface, a cylindrical extension, and an annular outer groove forming a lip on the extension;
first and second inner sleeves configured for assembly between the shaft and the outer sleeve, each inner sleeve comprising a tapered outer surface to interface with the tapered inner surface of a respective one of the first and second ends of the outer sleeve, an inner surface to interface with the shaft, and an externally threaded extension;
a first nut having a threaded inner surface for interfacing with the threaded extension of the first inner sleeve, and an eccentric aperture forming an inner groove of varying depth for interfacing with the lip of the first end of the outer sleeve; and
a second nut having a threaded inner surface for interfacing with the threaded extension of the second inner sleeve, and an eccentric aperture forming an inner groove of varying depth for interfacing with the lip of the second end of the outer sleeve.
11. The system of claim 10 , wherein the inner groove of the first nut forms a lip of varying depth.
12. The system of claim 11 , wherein the lip of the first nut and the annular outer groove of the first end of the outer sleeve are dimensioned to permit a distal face of the first end of the outer sleeve to abut the first nut during threaded engagement of the first nut and the first inner sleeve for drawing the first inner sleeve between the first end of the outer sleeve and the shaft.
13. The system of claim 12 , wherein the inner groove of the second nut forms a lip of varying depth.
14. The system of claim 13 , wherein the lip of the second nut and the annular outer groove of the second outer sleeve are dimensioned to permit a distal face of the second outer sleeve to abut the second nut during threaded engagement of the second nut and the second end of the inner sleeve for drawing the second inner sleeve between the second end of the outer sleeve and the shaft.
15. The system of claim 10 , wherein a lateral wall of the inner groove of the first nut abuts the lip of the first outer sleeve to urge the first inner sleeve out of engagement with the first end of the outer sleeve and the shaft.
16. The system of claim 15 , wherein a lateral wall of the inner groove of the second nut abuts the lip of the second outer sleeve to urge the second inner sleeve out of engagement with the second end of the outer sleeve and the shaft.
17. The system of claim 10 , wherein the eccentric aperture of the first nut is of larger diameter than an outer diameter of the lip of the first end of the outer sleeve.
18. The system of claim 17 , wherein the inner groove of the first nut varies in depth from a maximal depth to substantially flush with the central aperture.
19. The system of claim 18 , wherein the eccentric aperture of the second nut is of larger diameter than an outer diameter of the lip of the second end of the outer sleeve.
20. The system of claim 19 , wherein the inner groove of the first nut varies in depth from a maximal depth to substantially flush with the central aperture.
21. The system of claim 10 , wherein the first nut is centered with respect to the first end of the outer sleeve by threaded engagement with the first end of the inner sleeve.
22. The system of claim 21 , wherein the second nut is centered with respect to the second end of the outer sleeve by threaded engagement with the second end of the inner sleeve.
23. A method for assembling a hollow member and a shaft, the method comprising:
assembling an outer sleeve and a first and second inner sleeve between the hollow member and the shaft, the outer sleeve having first and second ends, each of the first and second ends comprising a tapered inner surface and a cylindrical extension presenting an annular outer groove forming a concentric lip, the first and second inner sleeves each comprising a tapered outer surface to interface with the tapered inner surface of the respective first and second ends of the outer sleeve, an inner surface to interface with the shaft, and an externally threaded extension;
assembling a first locking member on the first inner sleeve, the first locking member including an inner threaded section to interface with the threaded extension of the first inner sleeve, and an eccentric aperture forming a varying depth groove for receiving the lip of the first end of the outer sleeve;
assembling a second locking member on the second inner sleeve, the second locking member including an inner threaded section to interface with the threaded extension of the second inner sleeve, and an eccentric aperture forming a varying depth groove for receiving the lip of the second end of the outer sleeve; and
tightening the first and second locking members on the first and second inner sleeves, respectively, to draw the outer sleeve and the first and second inner sleeves into engagement between the hollow member and the shaft.
24. The method of claim 23 , wherein the eccentric aperture of the first locking member is of larger diameter than the lip of the first end of the outer sleeve.
25. The method of claim 24 , wherein the eccentric aperture of the second locking member is of larger diameter than the lip of the second end of the outer sleeve.
26. The method of claim 23 , comprising the further step of tightening a set screw in the first or second locking member to prevent loosening of the respective locking member.
27. The method of claim 23 , wherein as the first locking member is tightened on the first inner sleeve, the first locking member abuts a further lip of the first end of the outer sleeve for drawing the first inner sleeve between the first end of the outer sleeve and the shaft.
28. The method of claim 23 , wherein as the first locking member is tightened on the first inner sleeve, a body portion of the first locking member abuts a distal face of the first end of the outer sleeve for drawing the first inner sleeve between the first end of the outer sleeve and the shaft.
29. A method for disassembling an outer member and a shaft, the method comprising:
rotating a first locking member on a tapered first inner sleeve positioned between a tapered first end of an outer sleeve and a shaft, the first end of the outer sleeve having a tapered inner surface and a cylindrical extension presenting an annular groove, the first inner sleeve having a threaded extension and a tapered outer surface interfacing with the tapered inner surface of the first end of the outer sleeve, the first locking member having a threaded inner section engaging the threaded outer surface of the first inner sleeve, and an eccentric aperture forming a varying depth groove, a side wall of the varying depth groove contacting a side wall of the annular groove of the first end of the outer sleeve to force relative displacement of the first end of the outer sleeve and the first inner sleeve; and
rotating a second locking member on a tapered second inner sleeve positioned between a tapered second end of an outer sleeve and a shaft, the second end of the outer sleeve having a tapered inner surface and a cylindrical extension presenting an annular groove, the second inner sleeve having a threaded extension and a tapered outer surface interfacing with the tapered inner surface of the second end of the outer sleeve, the second locking member having a threaded inner section engaging the threaded outer surface of the second inner sleeve, and an eccentric aperture forming a varying depth groove, a side wall of the varying depth groove contacting a side wall of the annular groove of the second end of the outer sleeve to force relative displacement of the second end of the outer sleeve and the second inner sleeve.
30. The method of claim 29 , wherein the varying depth groove of the first locking member has a depth varying from a maximal depth to substantially flush with the eccentric aperture.
31. The method of claim 30 , wherein the varying depth groove of the second locking member has a depth varying from a maximal depth to substantially flush with the eccentric aperture.
32. The method of claim 29 , further comprising loosening a set screw in the first or second locking member prior to rotating the respective first or second locking member on the tapered sleeve.