| 摘要 |
A mobile storage system comprises storage units 12 mounted on tracks and having a drive comprising a handle 16 for rotating drive sprocket 28 connected to a driven sprocket by a chain. To prevent overload damage to the drive there is a torque limiting overload clutch between the handle and the drive input shaft 18. The clutch comprises a drive input member 24 fixed to input shaft 18 and having flat end surface 32 with circumferentially spaced recesses formed therein and hub member 22 rigidly fixed to the handle and rotatably mounted by screw 72 and washer 70 on the shaft, the hub having axial passages therein containing a screw 66 axially adjustable to vary a spring 68 bias acting to press balls 26 into recesses 40 in the input member. |
