| 摘要 |
A metal journal for the rolling friction bearings on a roller shutter with a wooden shaft is made of a tube with sharp edges at one end which is driven axially into the centre of the shaft. The part which penetrates into the wood can be circular, oval, square, triangular in section or ribbed. The circular journal end is separated from the embedded end by an upset collar in the tube wall or by a step from a larger dia. to the smaller dia. of the bearing seat. This creates an inexpensive journal and prevents splaying of the wooden shaft ends. |
