| 摘要 |
An improved quilting machine, with a housing made by a C-shaped frame that has upper and lower arms, wherein the needle structure at the front end of the upper arm have conventional design (as used in commercial sewing machines) and the bobbin is placed to an elevated height by providing an upwardly extended end portion of the lower arm, wherein an offset shaft transmission means is be provided in the upwardly extended portion that acts as a power transmission towards the bobbin driving axle from the lower driving axle extending in the lower arm, wherein the upper and lower driving axles comprise of hollow drive shafts connected via flexible coupling means to half-shafts mounted on plates that are integral parts of the C-frame by dual ball bearing mounts. By such a simple design the reciprocating mass of the needle structure and the mass of the torque transmission means are reduced, conventional needle moving structures can be used and owing to the lighter load, the dimensions of the drive train can be less massive and heavy.
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