Four pair wheel drive (DOHB) mainly consists of fixed base, movable base, linear cable drive device, limit device, meter counting device etc. Linear cable drive device shares drive module with LCE; DOHB works in conjunction with Cable drum engines (CDE). It can also operating independently for cable winding operation.

Main technical specifications：

Maximum linear tension：35 kN

Tension control accuracy:±10 kN

Linear velocity：0～6 kt

Meter counter control accuracy:±0.1%

Cable diameter：?12～?350 mm

Lateral movement distance：4800/1000 mm