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US 2022/0219305 A1Published application
Con rod
OwnerTobias Heep, Jozef Brissak +1inventors
InventorsTobias Heep, Jozef Brissak, Vaclav Kvapil
Life of this patent
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Abstract
A hammer drill is provided including a housing, a motor mounted within the housing, and a hammer mechanism. The hammer mechanism includes a crank plate or a wobble plate driven by the motor, a con rod coupled to the crank plate or the wobble plate, a piston reciprocatingly driven by the con rod along a longitudinal axis, a ram and a beat piece. At least one of the wobble plate or the con rod is made of sintered steel.
Claims19
A hammer drill comprising:
- a housing;
- a tool holder mounted on the housing and configured to hold a cutting tool;
- a motor mounted within the housing;
- and
- a hammer mechanism comprising:
- a crank plate;
- a con rod pivotally connected at a first end to the crank plate, the con rod being made of sintered steel in a one-piece construction;
- a piston slidably mounted in the housing and reciprocatingly driven along a longitudinal axis by the motor via the crank plate and con rod, wherein a second end of the con rod is pivotally connected to the piston;
- a ram mounted in the housing forward of the piston that is reciprocatingly driven along the longitudinal axis by the piston via an air spring;
- and
- a beat piece supported in an axially sliceable manner along the longitudinal axis within a beat piece support structure, wherein during the normal operation of the hammer mechanism, the beat piece is repetitively struck by the ram and transfers impact energy to the cutting tool.
8 more elements
A hammer drill comprising:
- a housing;
- a tool holder mounted on the housing and configured to hold a cutting tool;
- a motor mounted within the housing;
- and
- a hammer mechanism comprising:
- a wobble plate driven by the motor, the wobble plate being at least partially made of sintered steel;
- a con rod pivotally including a first end coupled to the crank plate and a second end;
- a piston slidably mounted in the housing and coupled to the second end of the con rod, the piston being reciprocatingly driven along a longitudinal axis by the motor via the wobble plate and the con rod;
- a ram mounted in the housing forward of the piston that is reciprocatingly driven along the longitudinal axis by the piston via an air spring;
- and
- a beat piece supported in an axially sliceable manner along the longitudinal axis within a beat piece support structure, wherein during the normal operation of the hammer mechanism, the beat piece is repetitively struck by the ram and transfers impact energy to the cutting tool.
8 more elements
Dependencies are inferred from the claim text.