Compensating shaft assembly for piston engines

Details Compensating shaft assembly for piston engines Compensating shaft assembly for piston engines

F - Mech Eng,Light,Heat,Weapons

16

F

F16F 15/26 (2006.01)

Patent

CA 2388093

A balance shaft unit for internal combustion engines consists of at least one balance shaft (6, 7) supported in a balance casing (5) and counterweights (8) connected onto it. In order to achieve maximum precision, reliable fastening and minimum external dimensions at minimum manufacturing costs, the counterweight (8) is essentially a cylindrical ring with two end surfaces (61) normal to the axis and with a cutout (55) in the longitudinally central region, so that the counterweight consists of two ring parts (60, 61) abutting the two end surfaces (61) and an intermediate segmental part (62). One of the end surfaces (61) of the counterweight (8) forms, jointly with a machined surface (33) of the balance casing (5), a thrust bearing (32).

Ensemble d'arbres de compensation pour moteurs à combustion interne comprenant au moins un arbre de compensation (6, 7) monté dans un carter de différentiel (5), et des contrepoids (8) fixés sur ledit arbre. L'invention a pour but de produire, avec un minimum de frais, un ensemble du type précité, d'une haute précision, pouvant être fixé de manière fiable et présentant des dimensions extérieures minimales. En conséquence, l'invention est caractérisée en ce que le contrepoids (8) est constitué par une bague sensiblement cylindrique à deux faces frontales (61) normales à l'axe et comportant une découpe (55) dans la zone centrale longitudinale, de telle façon que le contrepoids comprenne deux parties annulaires (60, 61) reliant les deux faces frontales (61) et un segment interposé (62). L'une des faces frontales (61) du contrepoids (8) forme, conjointement avec une surface usinée (33) du carter de différentiel (5), une crapaudine (32).

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