Patent GB-483703-A (GB)
Title: Improvements relating to flexible mountings for internal combustion engines
IPC: F16F3/10
Filed: 1936-10-16
Abstract: 483,703. Mounting motors. GARDNER & SONS, Ltd., L., GARDNER, J. H. S., and GARDNER, J. K. Oct. 16, 1936, No. 28130. [Class 79 (iii)] The torque reactions of an internal-combustion engine mounted so as to be rockable about its longitudinal axis, are absorbed by a member or members, each pivotally connected to the engine and directed substantially tangentially to a circle centred on the longitudinal axis, with the point of pivotal connection on the circumference, having its movements opposed by a low resistance spring which absorbs normal reactions combined with a high resistance limiting stop which comes into operation to prevent excessive movements. The bolt g, shown in Fig. 4, is pivoted to the engine casing i and lies tangentially to a circle centred on the longitudinal axis of oscillation of the engine, the pivot h being . on the circumference of the circle. The bolt passes through a bracket o on the chassis frame member c, being supported by a low resistance spring m and a high resistance rubber ring r, the clearance before the ring r comes into action being of the order of one-fiftieth of an inch. A collar j adjusted by nuts k bears on the spring m, an outer cap p secured by a nut q bearing on the ring r when the spring is compressed to the extent indicated. The ring r seats on a casing n enclosing the spring m. A rubber sleeve s surrounds the bolt within the bracket o and, below the bracket, a second high resistance rubber block t is interposed between a collar u, adjustable by a nut v, and a cup-washer w. In a three point support, the engine may be hung at each side at the rear end by a suspension member as in Fig. 4, being supported at its front end by a rubber bushed pivot pin located at the axis of oscillation, Fig. 2 (not shown), or, if location on such axis is not possible, by a bolt 11 secured to an engine bracket 12, Fig. 8, below the axis of oscillation, the bolt passing through low and high resistance rubber blocks 10, 14, the low resistance block 10 being seated in a cup recess in a transverse bracket 15 secured to the chassis frame. The block is a close fit in the cup in a fore-and-aft direction but is tapered at the sides to allow lateral movements. A radial tie-link may connect the engine to the frame at the rear end to prevent lateral movements. In a modified arrangement, the rear end of the engine and gearbox unit is supported by a rubber bushed ring coaxial with the axis of oscillation, the torque reactions being absorbed by flexible stops as shown in Fig. 11. In this form, each bolt g<1> normal to a radius from the axis of oscillation E<1>, is supported by means of a collar or plate j<1> bearing in succession upon a spring m<1> and a highly resistant rubber ring r<1> carried by a bracket o<1> secured to the chassis frame, a further rubber buffer t<1> being interposed between the under side of the bracket and a collar u<1>. In a further modification, Fig. 12 (not shown), a double acting torque absorbing member is provided at one side only of the engine. In this form a low resistance spring as well as a highly resistant rubber block is arranged on each side of the frame bracket between it and plates or collars on the bolt.