초록 ▼

A hand-held power tool for driving a working tool (1) includes a drive belt (3), first and second arms (5a, 5b) longitudinally displaceable relative to each other and carrying respective deflection rollers (6) of the drive belt (3), a belt tensioning device (4) located between the first and second a

A hand-held power tool for driving a working tool (1) includes a drive belt (3), first and second arms (5a, 5b) longitudinally displaceable relative to each other and carrying respective deflection rollers (6) of the drive belt (3), a belt tensioning device (4) located between the first and second arms (5a, 5b) and including a spring (8) preloaded against the first arm (5a), and a displaceable pressure piston (9) located between the spring (8) and the second arm (56).

대표청구항 ▼

What is claimed is: 1. A hand-held power tool for driving a working tool (1), comprising a drive belt (3); two arms (5a, 5b) longitudinally displaceable relative to each other and carrying respective deflection rollers (6) on the drive belt (3); a belt tensioning device (4) located between the two

What is claimed is: 1. A hand-held power tool for driving a working tool (1), comprising a drive belt (3); two arms (5a, 5b) longitudinally displaceable relative to each other and carrying respective deflection rollers (6) on the drive belt (3); a belt tensioning device (4) located between the two arms (5a, 5b) and including a spring (8) preloaded against a first arm (5a); a displaceable pressure piston (9) located between the spring (8) and the second arm (5b); and a rotatable rotary setting device (10) arranged in the first arm (5a) and excentrically engaging the pressure piston (9). 2. A hand-held power tool according to claim 1, further comprising a rotary stop (12) for the rotary setting device (10) and provided in the first arm (5a), and against which the preloaded spring (8) automatically presses upon a manual rotation of the rotary setting device (10) against a biasing force of the spring (8) and past the near dead point of the mutual longitudinal displacement of the arms (6a, 5b). 3. A hand-held power tool for driving a working tool (1), comprising a drive belt (3); two arms (5a, 5b) longitudinally displaceable relative to each other and carrying respective deflection rollers (6) on the drive belt (3); a belt tensioning device (4) located between the two arms (5a, 5b) and including a spring (8) preloaded against a first arm (5a); a displaceable pressure piston (9) located between the spring (8) and the second arm (5b); and manually releasable locking means (14) for fixedly securing the two arms (5a, 5b) relative to each other.