초록 ▼

A hand-held power tool includes a percussion mechanism ( 3) arranged in the tool housing (2), and a motor (4) for driving the percussion mechanism and connected therewith by a gear unit (5), with the percussion mechanism including an eccentric ( 6) a piston (7), and a connection rod (21; 41) connect

A hand-held power tool includes a percussion mechanism ( 3) arranged in the tool housing (2), and a motor (4) for driving the percussion mechanism and connected therewith by a gear unit (5), with the percussion mechanism including an eccentric ( 6) a piston (7), and a connection rod (21; 41) connecting the eccentric with the driving piston (7) and having a first part (22; 42) connectable with the eccentric (6), a second part (23; 43) connectable with the drive piston (7) and telescopically displaceable relative to the first part (22; 42) , and a spring for damping vibrations occurring during operation of the power tool and arranged between the first (22; 42) and second ( 23; 43) parts.

대표청구항 ▼

What is claims is: 1. A hand-held power tool comprising a housing (2); a percussion mechanism (3) arranged in the housing (2); a motor (4); and a gear unit (5) for drivingly connecting the motor (4) with the percussion mechanism (3), wherein the percussion mechanism (3) includes an eccentric (6), a

What is claims is: 1. A hand-held power tool comprising a housing (2); a percussion mechanism (3) arranged in the housing (2); a motor (4); and a gear unit (5) for drivingly connecting the motor (4) with the percussion mechanism (3), wherein the percussion mechanism (3) includes an eccentric (6), a piston (7), and a connection rod (21 ; 412) for connecting the eccentric with the piston (7), the connection rod (21; 41) having a first part (22; 42) connectable with the eccentric (6), a second part ( 23; 43) connectable with the piston (7) and telescopically displaceable relative to the first part (22; 42), and a spring for damping vibrations occurring during operation of the power tool and arranged between the first (22; 42) and second (23; 43) parts, wherein one of the first (22, 42) and second (23; 43) parts of the connection rod (21) has at least one guide groove (3), and another of the first (22; 42) and second (23; 43) parts of the connection rod (21) has at least one projection cooperating with the guide groove (33) for preventing disengagement of the first (22; 42) and second (23; 43) parts from each other. 2. A hand-held power tool according to claim 1, wherein the piston (7) is formed as a driving piston pneumatically connectable with a percussion piston (8) of the percussion mechanism (3) . 3. A hand-held power tool according to claim 1, wherein the spring is formed as a helical spring (24). 4. A hand-held power tool according to claim 3, wherein the first part (22) of the connection rod (21) forms a first support (29) and the second part (23) of the connection rod (21) forms a second support (30) for the helical spring ( 24). 5. A percussion mechanism (3) for a percussion hand-held power tool, comprising an eccentric (6); a driving piston ( 7); and a connection road (21; 41) for connecting the eccentric with the driving piston (7), the connection rod ( 21; 41) having a first part (22; 42) connectable with the eccentric (6), a second part (23; 43) connectable with the driving piston (7), coaxial with the first part (22; 42) and telescopically displaceable relative to the first part (22; 42); and a spring for damping vibrations occurring during operation of the power tool and arranged between the first (22; 42) and second (23; 43) parts coaxially therewith, wherein one of the first (22, 42) and second (23; 43) parts of the connection rod (21) has at least one guide groove (3), and another of the first (22; 42) and second (23; 43) parts of the connection rod (21) has at least one projection cooperating with the guide groove (33) for preventing disengagement of the first (22; 42) and second (23; 43) parts from each other. 6. A connection rod for a percussion mechanism which is used in hand-held power tools and which includes an eccentric (6) and a driving piston (7), the connection rod comprising a first part ( 22; 42) connectable with the eccentric (6); a second part (23; 43) connectable with the4 driving piston (7 ), coaxial with the first part (22; 42) and telescopically displaceable relative to the first part (22; 42); and a spring for damping vibrations occurring during operation of the power tool and arranged between the first (22; 42) and second ( 23; 43) parts coaxially therewith, wherein one of the first (22, 42) and second (23; 43) parts of the connection rod (21) has at least one guide groove (3), and another of the first (22; 42) and second (23; 43) parts of the connection rod (21) has at least one projection cooperating with the guide groove (33) for preventing disengagement of the first (22; 42) and second (23; 43) parts from each other.