Gear Motors Basic Design 2 7 5 8 9 3 1 4 8 9 6 3 10 11 BASIC MOTOR’S PARTS 1 - Drive Gear 2 - Driven gear 3 - Bushings 4 - Body 5 - Flange 6 - Cover 7 - Rotary shaft seal 8 - Compensation seals 9 - Anti-extrusion seals - stop Ring - support ring Generally these gear motors usually consist of a gear pair supported by two aluminum bushings, a body, a securing flange and a cover. Shaft of the driving gear projecting beyond the flange mounts a seal ring coupled with a metallic ring to strengthen the solution; both rings are held in place by an elastic securing ring. The body is profiled by means of extrusion and it is made of a special aluminium alloy with high strength for minimized deformation even when subject to high pressure. Marzocchi Pompe has renewed its own range of products, now launched with the new name of GHM1, GHM2 and GHM3, suitable for the widest range of application, both in the industrial and themobile sector. Gear motors convert hydraulic pressure and flow into torque and angular displacement, rotary mechanical power, applied to a load via the shaft. They feature versatility, strength and long useful life. Their simple construction compared to other types of motors (piston, orbital, etc) ensures limited purchase costs and servicing. Thanks to these basic concepts, together with ever-improving product design and features, research-based on many years of experience, accuracy in material selection, production process followed in great detail and tests on mass-produced parts, jbj Techniques can provide Marzocchi gear motors with top quality standards that can work under heavy operating conditions and transmit high hydraulic power. Furthermore, these gear motors feature good hydraulic, mechanical and volumetric efficiency, low noise level and compact dimensions with lowweight/power ratio. The flanges and covers are made out of cast iron, obtained through a process of continuous flow casting and with a final surface treatment of phosphating. Gears are made of special steel. Their manufacturing process includes case-hardening and quench hardening. Then gears are ground and fine finished so to have a high degree of surface finishing. Proper tooth profile design and geometric proportions ensure low pulsation levels and low noise levels during motor operation. Bushings aremade of special low-friction and hi-resistant aluminium alloy andmanufactured fromdie-casting that have excellent characteristics of high strength and anti-friction properties. Also equipped with anti-friction DU bearings with tight tolerance. Special and symmetric compensation zones onto bushings, insulated by special preformed seals with special anti-extrusion ring, allow fully free axial and radial movement to the bushings, which is proportional to motor operating pressure. In this way, internal leakage is dramatically reduced, thus ensuring very good pump performance (both in terms of mechanical and total efficiencies) and proper lubrication of pumpmoving parts. www.jbj.co.uk/gear-motors.html #DriveLineHarmony 10 11 6
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