GB274168A - Improvements in mechanism for the interconversion of reciprocating and rotary motion - Google Patents

Abstract

274,168. Crankless Engines, Ltd., and Michell, A. G. M. April 7, 1926. Swash-plate linkages.-In driving mechanism for pumps, motors, &c., of the type in which a reciprocatory yoke member embracing the periphery of a swash plate carries universally pivoted slippers co-acting with the plane faces thereof, the yoke member is formed with an external cylindrical guide surface and the pivotal centres of the slippers are arranged on a line parallel with but eccentric to the axis of the cylindrical guide surface. The yoke member 2 integral with the piston 1 is of hollow crescent form with a cylindrical outer surface 9 sliding in a fixed guide 10. and an inner surface 11 shaped to fit the periphery of the swash plate 6. The slippers 4, 5 are unsymmetrically attached to hemispherical pivots 7, 8 seated in cups 4a, 5a carried by the yoke which is provided at its outer end with an integral or attached lug or plate 3. The line P - - P passing through the pivotal centres lies below the cylinder axis C - - - C the resultant bearing pressures S, R being as shown in Fig. 5 in the case. of a motor and as in Fig. 3 in the case of a pump. in the latter case, the inner bearing surface 11 of the yoke is removed at 13 and extended at 12. either integrally or by bolted attachment, so that the resultant bearing pressure R is to the rear of the centre of area of the bearing surface 11 to provide for wedge film lubrication. The yoke and/or the fixed guide 10 may carry separate bearing members either rigidly or non-rigidly attached thereto, such as the slipper pads 17, 18 in recesses 15, 16 located in the lines of action of the bearing pressures S. R.. and adapted to establish wedge film lubricatian.