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US 4,160,568 AGranted
Stable preload shock mounted bearing assembly
AssigneeSystron Donner Corporation
InventorRichard D. Marquess
Life of this patent
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AssigneeSystron Donner Corporation
InventorRichard D. Marquess
Estimating the term…
A cylindrical bearing housing has an axial bore therethrough and external threads. A land is formed around the circumference of the bore having a width less than the axial length of the bore. A bearing member has a bearing surface on one end accessible through one end of the bore and has shoulders on each end of the bearing member. The bearing member is fabricated to pass through the bore and to have a length such that the shoulders are spaced apart a distance greater than the width of the land. An elastic filler material is disposed between the bearing member and the walls of the bore while the bearing member is suspended centrally therein, thereby retaining the bearing member axially in the bore. The bearing housing is configured for mounting and axial adjustment in a base member. A rotating member having a pair of pivots, one each on opposite sides thereof is provided having an axis of rotation passing through the pivots. When mounted bearing assemblies are positioned so that the bearing surfaces contact the pivots, a preload is set having improved stability over wide temperature variation. In one embodiment of the bearing assembly, the elastic filler material applies a shear force against the bearing member for preloading its bearing surface against the associated pivot. In another embodiment, separate apparatus, specifically a spring member applies a force against the back of the bearing member to at least aid in preloading the bearing surface against its associated pivot.
A bearing assembly for engaging a pivot comprising a bearing housing having a passage extending therethrough, a land on the wall of said passage, a bearing member disposed in said passage, a bearing surface on one end of said bearing member for contact with the pivot, a shoulder on each end of said bearing member disposed in spaced relation on opposite sides of said land, and a resilient mass extending between each of said shoulders and one side of said land, whereby said bearing member is retained in said bearing housing so that transmission to said bearing member of shock and vibration applied to said bearing housing is reduced, and temperature induced dimensional change in said resilient mass produces similar force magnitude on each of said shoulders, whereby resultant force urging axial displacement of said bearing member relative to said bearing housing is minimized.
A bearing assembly for engaging a pivot comprising a bearing housing having a bore extending therethrough, a land on the wall of said bore having first and second sides spaced from the ends of said bore, and defining a land width therebetween, a bearing member, first and second shoulders on the ends of said bearing member spaced apart a distance greater than said land width, said bearing member being configured for disposition centrally in said bore spaced from the walls thereof and the surface of said land, said first shoulder being spaced from said first land side through a distance greater than said second shoulder is spaced from said second land side, an elastic filler in the space between said bearing member and said bore for retaining said bearing member in said bore, and a bearing surface on one end of said bearing member adjacent said first shoulder, whereby preloading said bearing surface against the pivot shifts the bearing member against said elastic filler so that said first and second shoulders are spaced substantially the same distance from said first and second land sides respectively.
An apparatus providing for relative rotational motion between components thereof, comprising a moving member having an axis for rotation, a base member having an axis of rotation, a pair of pivot members attached to opposite sides of said moving member on said axis for rotation, a pair of bearing housings mounted in said base member, said bearing housings having a bore therethrough with the bore axis aligned with said axis of rotation of said moving member, a bearing member disposed in each of said bearing housing bores, a bearing surface on the end of said bearing members accessible from one end of said bearing housing bore and contacting said pivot members, a land in each of said bearing housing bores spaced from the ends thereof, a shoulder on each end of said bearing member so that when said bearing members are disposed in said bearing housing bores one of said shoulders is spaced from each side of said land, and a resilient filler disposed between the surfaces of said bore and said bearing member and operating to retain said bearing member therein, and means for adjusting the position of said bearing housings along the axis of said bore, so that a predetermined preload force is set between ones of said pivot members and said bearing surface opposed by internal stress in said resilient filler, whereby temperature induced dimensional changes in said resilient filler produce opposing forces against said bearing member shoulders and deviation of said predetermined preload force is reduced.
A bearing assembly for engaging a pivot comprising a bearing housing having a front end, a back end and a passage extending therethrough from said front end to said back end, a bearing member having a front end and back end and being disposed within said passage, said member including on the front end thereof a bearing surface located adjacent the front end of said housing and adapted for engagement with said pivot, said bearing member being axially movable within said passage relative to said housing whereby to preload said bearing surface against said pivot, first means located between said bearing housing and said bearing member for reducing the transmission to said bearing member of shock and vibration applied to said housing and for applying a shear force against said bearing member in the direction of said bearing surface for preloading said surface against said pivot, said first means being such that said shear foce varies to a limited degree with changes in temperature, and second means connected with said housing adjacent the back end thereof for applying an additional force against the back end of said bearing member in the direction of said bearing surface to aid said shear force in preloading said surface against said pivot, said second means being such that said additional force remains substantially constant regardless of temperature changes at said second means.
A bearing assembly for engaging a pivot, comprising:
Dependencies are inferred from the claim text.