Dana Holding Corporation, Toledo, Ohio, last week exhibited a drivetrain system designed for 60-foot articulated and telescopic boom aerial work platforms. This system includes a Spicer Model 212 steering planetary drive axle, a Spicer Model 112 rigid planetary drive axle with an integrated Spicer Model 305 gearbox, and a Spicer 10 Series driveshaft. With minor changes to the configuration, these components can also be used for telescopic boom handlers, compactors, and rough-terrain forklifts.
“Telescopic boom handlers and aerial boom lifts used at concrete and masonry construction worksites must demonstrate versatility for use on a variety of projects, operate in close quarters on uneven ground, and transport materials—all with a high degree of control and the highest regard for safety on the jobsite,” said Pietro Franzosi, vice president of sales and marketing for the Dana Off-Highway Products Group. “Dana meets these challenges with a complete range of axles, transmissions, driveshafts, and controls for aerial work platforms as well as many other construction vehicles.”
The Spicer Model 212 steering planetary drive axle features an integrated steering cylinder with a 55-degree maximum steering angle and a 6-to-1 planetary final drive ratio. The Model 212 axle is engineered with heavy-duty double-U joints; a trunnion mount; a spiral bevel gear center section; as well as end yoke, DIN, SAE, and mechanics input flange options. It has a 16,000 daN (static) and 8,000 daN (dynamic) load capacity, hydraulic-applied, inboard wet disc service brakes, and the choice of a manual-applied or spring-applied, hydraulic-released safety parking brake. The standard four-pinion differential can be upgraded with a hydraulic-applied 100-percent lock, limited-slip, or no-spin differential lock option.
The system shown at World of Concrete 2009 features a Spicer Model 305 gearbox directly flanged to a Spicer Model 112 rigid planetary drive axle, a configuration that provides a compact system solution to the vehicle designer. The Model 112 axle shares many of the same components as the Model 212 axle, allowing it to offer a 6-to-1 planetary final drive ratio as well as a 16,000 daN (static) and 8,000 daN (dynamic) load capacity. It also includes a spiral bevel gear, several differential options, wet disc service brakes, and a manual-applied safety parking brake.
Specifically designed for hydrostatic vehicles, the Spicer Model 305 gearbox includes hydrostatic motor mounting for one or two motors to offer protection from ground obstacles; ratio reduction options from 0.89:1 overdrive to a 5.00:1 reduction; and a front output for four-wheel drive configurations. This transfer case is capable of transmitting a maximum of 74 hp (55 kW) and 331 foot-pounds of continuous input torque with a 4,000 rpm maximum input.
Dana also configures this drivetrain solution with the two-speed, “shift-on-fly” Spicer Model 367 transmission, which combines the benefit of high efficiency with the comfort of automated shifting to enable a smooth transition from work to travel mode. A proven alternative to expensive powershift solutions or sliding-collar range-shift transmissions, the Spicer Model 367 transmission delivers 442 ft-lbs (61 kg-m) of continuous input torque with a 4,500 rpm maximum input, as well as a 1.930-to-3.250 (first) and 1.120-to-1.600 (second) ratio range with shift-on-fly capabilities.
The Model 367 transmission is composed of a single hydrostatic motor featuring a transfer case with low and high gear ratios that integrates the drivetrain system into the engine’s controller area network (CAN) to improve shift quality and reduce acceleration jerk during vehicle operation.
The Spicer 10 Series driveshaft is engineered to provide an extended spline life, reduced thrust loads under pressure, lower friction under the load, and superior needle-bearing retention. The driveshaft features universal joints that are easily serviced for minimized downtime.
For more information, visit www.dana.com/offhighway.
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