Precisely repositionable bearing cap

Details Precisely repositionable bearing cap Precisely repositionable bearing cap

F - Mech Eng,Light,Heat,Weapons

16

C

F16C 35/00 (2006.01) B22F 5/00 (2006.01) B22F 5/10 (2006.01) F02F 7/00 (2006.01) F16C 7/02 (2006.01) F16C 9/02 (2006.01) F16C 33/06 (2006.01) F16C 33/12 (2006.01) F16C 35/02 (2006.01) F16C 43/02 (2006.01)

Patent

CA 2253578

A bearing cap (10, 110, 210, 310, 410, 510) made from sintered powder metal has integrally formed tapered bosses (40, 140, 240, 340, 440, 540) surrounding its bolt holes (26, 126, 226, 326, 426, 526) which extend into counterbores (L) in the engine bearing bulkhead structure (B) and produce plastic conformance between the bosses (40, 140, 240, 340, 440, 540) and the bulkhead (B) when the boss (40, 140, 240, 340, 440, 540) is seated in the counterbore (L). The bearing cap (10, 110, 210, 310, 410, 510) can then be removed from the bulkhead (B) for installation of the crankshaft and reinstalled in the identical preformed position. The bosses (40, 140, 240, 340, 440, 540) are tapered, a moat (44, 144, 244, 344, 444, 544) surrounds each boss (40, 140, 240, 340, 440, 540), and the boss (40, 140, 240, 340, 440, 540) may be provided with axial splines (160, 460) and/or be oblong (540) in the axial direction. Voids (V1-V4) may also be formed in the planar surfaces of the feet (T, 22, 522) which abut the bulkhead (B).

Chapeau de palier (10, 110, 210, 310, 410, 510) fabriqué en poudre de métal fritté et possédant des protubérance coniques (40, 140, 240, 340, 440, 540) solidaires de l'ensemble et entourant ses trous de boulon (26, 126, 226, 326, 426, 526) s'étendant vers l'intérieur de lamages (L) pratiqués dans la structure de cloison (B) du palier moteur et créant une conformité plastique entre les protubérances (40, 140, 240, 340, 44, 540) et la cloison (B) quand la protubérance (40, 140, 240, 340, 440, 540) est située dans le lamage (L). On peut retirer le chapeau de palier (10, 110, 210, 310, 410, 510) de la cloison (B) afin de monter le vilebrequin et remonter le chapeau de palier dans sa position identique établie au préalable. Les protubérances (40, 140, 240, 340, 440, 540) sont coniques, un espace annulaire creux (44, 144, 244, 344, 444, 544) entoure chaque protubérance (40, 140, 240, 340, 440, 540) et la protubérance (40, 140. 240, 340, 440, 540) peut être pourvue de cannelures axiales (160, 460) ou présenter une forme oblongue (540) dans le sens axial. Des vides (V1-V4) peuvent également être créés dans les surfaces planes des embases (T, 22, 522) venant en butée contre la cloison (B).

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