GB347725A - - Google Patents

Abstract

347,725. Lubricating cranks and connecting-rods. TARTRAIS, E. H., 20, Rue GrÚtry, Montmorency, Seine-et-Oise, France. Nov. 26, 1929, No. 36242. Convention date, Nov. 26, 1928. [Classes 12 (i) and 12 (ii).] In a connecting-rod big-end assembly for aeroplane &c. engines, of the type in which the connecting-rods 42 are pivoted to a member 35, 38, which is mounted on the main crank 34 and is guided by two or more auxiliary crank shafts 39, an overhanging crank 34 is employed, the auxiliary shafts 39 are interconnected by gearing 48, 49 and escape of lubricant from the bearings of the auxiliary cranks 59 is prevented by side plates. The connecting-rods 42 may be pin-jointed to the member 35, or may have hemispherical ends 43 engaging bearings 37 on the member 35, which is mounted on the crank 34 by a ball bearing 36. The connecting-rods are held on the bearings 37 by rings 46, 461 secured together by bolts 47, and are jointed to the pistons by hemispherical ends 44 secured by nuts 45. Lubricant supplied through one of the shafts 39 passes to the crank 59 and by passages 56 in the plate 38 to a space 57, from which it passes to the bearings 37 and by tubes 60 to the bearings 44. Lubricant also passes from the passages 56 through a small opening 61 and passages 62, 63 to the crank-shaft bearing 27. Lubricant collected by gutters 67, 68, 69 and escaping by a passage 64 is drained through passages 65, 66 without entering the crank chamber. As shown in Fig. 4, each auxiliary crank pin 15 is formed with a shoulder 16 clamped by a flexible plate 17 and a bolt 21. The lubricant is supplied by a passage 18. One or more loose bushes 22 may be provided in order to permit employment of adequate play in the bearing.