Patent ID: 9533388
Date: 2017-01-03
CPC Classifications: A47B,B23Q,B24B,B25H,Y10T

Claim:
1. An adjusting device for lifting and lowering a workbench provided between a workbench and a workbench rest and characterized by: said workbench having one underside secured on a topside of said workbench rest, said workbench having another underside extending integrally to form a fixed plate, a space interval formed between a topside of said fixed plate and a topside of said workbench rest; an adjusting seat firmly fixed with said workbench rest, said adjusting seat bored with a longitudinal threaded hole; an adjusting wheel having one end screwed with said threaded hole, said adjusting wheel having another end protruding out of said adjusting seat, said adjusting wheel bored with a longitudinal through hole; a screwing fastener having an upper end formed with a flange, said screwing fastener having an outer circumference fitted with a bushing, said bushing pressing against said flange of said screwing fastener, another end of said screwing fastener together with said bushing inserted through said fixed plate of said workbench and said through hole of said adjusting wheel, said bushing pushing against a topside of said workbench rest, said screwing fastener having a lower end screwed and locked with said workbench rest, said bushing having an upper end and a lower end respectively pressing against said flange of said screwing fastener and a topside of said workbench rest, a first distance formed between said flange and a topside of said fixed plate; and an elastic member fitted around an outer circumference of said bushing and positioned between said flange of said screwing fastener and a topside of said fixed plate, said elastic member formed with a prestress toward said workbench; said prestress of said elastic member functioning to push against said workbench to enable said workbench to be surely driven by screw rotation of said adjusting wheel, thus said adjusting wheel able to easily drive said workbench to move up and down.