Cutlery
Patent
1981-01-26
1983-01-04
Footland, Lenard A.
Cutlery
308184R, 308189R, 308236, 291495R, F16C 2704
Patent
active
043669956
DESCRIPTION:
BRIEF SUMMARY
This invention relates to an arbor assembly for a bearing spindle which presents thereto a multi-row of rolling bearing elements with an inherent moment fixing the spindle axis against tilting and, under constraint of that moment, supporting the spindle for anti-frictional high-speed rotation. The assembly includes bearing retaining ring means and elastomer pre-loaded thereagainst providing yieldability in the spindle mounting, especially adapting it for use in a cutterbar drive to mow weeds, lawns, and the like. Shock loads, which are thus better accommodated, are common because of obstructions encountered in mowing.
Made of record, relevant to background, are U.S. Pat. Nos. 2,277,635, 3,584,923, 4,065,190 and 4,193,310. Especially made of record are U.S. Pat. No. 2,938,754 disclosing a bipartite bearing sleeve and a bearing member splined therein for slidable movement yet kept fluid tight thereto by two diametrically divided, tapered seals of relevance, and U.S. Pat. Nos. 2,923,580 and 3,382,015 disclosing an outer bearing member having a retaining ring groove thereabout and secured in a bore by a snap ring of relevance.
It is an object of the invention that a single snap ring be utilized on the outside of a spindle bearing of the multi-row type, fitted in a complementary receiving groove thereabout and solely providing the bearing retaining ring means or collar or locating shoulder necessary.
An object in line with the foregoing objective is to provide for ready adaptability of the design to a multiplicity of applications by merely placing the snap ring groove in a slightly different longitudinal position on the outside of the bearing, whereby the spindle in the bearing can be longitudinally located to suit the installation. Or, several snap ring grooves cut in the outside of a more universal single fixed design of bearing will allow the bearing and a mount therefor of fixed design to serve several different installations each requiring a different cutting height and each requiring use of a different one of the parallel grooves for occupancy by the single ring employed.
It a further object of the invention to employ a highly versatile mount suitably open at both ends of its bearing receiving bore, thus allowing placement of the bearing and spindle longitudinally as desired according to the precise placement of the snap ring groove and the snap ring confined within the mount bore.
Another object is to provide a mount of sheet metal construction, bipartite in design because symmetrically formed by two identical or practically identical bore defining halves presenting confronting mounting flanges to one another.
An additional object is forming such two halves from bent sheet metal which, at their inner juncture where the mounting flanges confront, defines inside the sheet metal a cusp-shaped space to receive the retaining ring when the bearing is longitudinally in place therein.
Another object, materializing with the provision of elastomeric material intervening in the cusp space at one or both sides of the retaining ring between it and the mount halves, is to enable the bearing mount within itself to act as an axial shock-load absorber and/or act as a noise supressor so important to arbor assemblies to be utilized in mower blade and fan installations. A related object when the mounting flanges of the mount halves are brought together, is to thereby compressively preload the elastomeric material thus removing the axial/radial looseness inherent in the entire assembly which would otherwise permit movement or vibration from regular forces and result in earlier deterioration; nevertheless, the bearing within the mount, because of the elastomer, remains free to readily shift in absorbing undue axial shock stress.
A further object resides in unitizing the entire assembly simply by permanently fastening together the mount halves through their confronting mounting flanges, whereby a self-contained arbor assembly results, readily merchandiseable by units as replacement items in substitution for some unit in existi
REFERENCES:
patent: 2740673 (1956-04-01), Guy
patent: 3844630 (1974-10-01), Lechner
patent: 4089569 (1978-05-01), Rempel
patent: 4138168 (1979-02-01), Herlitzek
Federal-Mogul Corporation
Footland Lenard A.
Hess Robert F.
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