Hand-held power tool
AssigneeHilti Aktiengesellschaft
InventorJosef Fünfer
Life of this patent
Estimating the term…
Abstract
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.
Claims6
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.
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.
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.
Dependencies are inferred from the claim text.