Escalator having handrail/drive-wheel self-adjusting traction mechanism

An escalator having a handrail arranged on a drive wheel, comprising:

• handrail drive means, responsive to a handrail drive force, for providing a handrail drive tension force, and further responsive to a handrail/drive-wheel traction self-adjusting force, further for providing a handrail/drive-wheel traction force between the drive wheel and the handrail;
• and
• handrail/drive-wheel traction self-adjusting means, responsive to the handrail drive tension force, for providing the handrail/drive-wheel traction self-adjusting force to adjust the handrail/drive-wheel traction between the drive wheel and the handrail, wherein the handrail/drive-wheel traction adjustment means comprises:
• a handrail/drive-wheel traction pushrod being slidably arranged in a fixedly mounted pressure belt tension spring plate, having one end connected to a pivotally mounted pressure belt tension adjustment arm, having another end with a chain tension wheel coupled to a drive chain of the handrail drive means;
• and
• a pressure belt tension spring arranged on the handrail/drive-wheel traction pushrod between the pivotally mounted pressure belt tension adjustment arm and the pressure belt tension spring plate, for providing a pressure belt tension spring force on the pivotally mounted pressure belt tension adjustment arm of the handrail drive means.