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US 9,174,281 B2Granted
Power drill
AssigneeRoehm GmbH
InventorPeter Schenk
Life of this patent
Estimating the term…
Abstract
A drilling apparatus has a housing, a motor in the housing, a drive spindle rotatable about an axis on the housing, a chuck body, and a plurality of jaws shiftable in the chuck body. First and second elements interconnected by a screw thread and engaged between the body and the jaws for shifting the jaws on the housing. A drive sleeve rotationally fixed to the first element is drivable by the motor.
Claims13
A drilling apparatus comprising:
- a housing;
- a motor in the housing;
- a transmission having an input gear drivable by the motor and an output gear;
- a tubular drive spindle rotatable about an axis on the housing;
- a chuck body rotationally fixed on the drive spindle;
- a plurality of jaws shiftable axially and radially in the chuck body;
- a coupling rod rotatable about the axis in the drive spindle;
- an internally threaded sleeve rotationally connected to the coupling rod and rotatable in the drive spindle;
- a driver rotationally fixed to the chuck body, bearing axially on the jaws and connected by a screw thread to the internally threaded sleeve for shifting the jaws on the chuck body on relative rotation of the coupling rod and drive spindle;
- and
- a drive sleeve rotationally fixed to the coupling rod and to the output gear so as to be drivable by the motor;
- and
- means connected to the output gear for moving same relative to the drive spindle between a tightening position with the drive sleeve rotationally coupled to the coupling rod but not to the drive spindle and a drilling position with the drive sleeve rotationally coupled to both the coupling rod and the drive spindle, whereby in the tightening position the motor only rotates the coupling rod and threaded sleeve to axially shift the driver and jaws relative to the chuck body and in the drilling position the motor rotates the coupling rod, threaded sleeve, driver, drive spindle, and jaws together.
10 more elements
A drilling apparatus comprising:
- a housing;
- a tubular drive spindle extending forward along an axis from the housing;
- a drive sleeve rotatable in the housing about the axis and axially shiftable between a tightening end position and a drilling end position;
- a drive motor in the housing and connected to the drive sleeve for rotating the sleeve about the axis;
- a chuck body carried on the spindle outside the housing;
- an internally threaded sleeve centered on the axis inside the drive sleeve;
- a driver having a rearwardly directed stem threaded into the internally threaded sleeve;
- respective jaws shiftable in the chuck body and axially rearwardly braced on the driver;
- a coupling rod rotationally coupled to the internally threaded sleeve and to the drive sleeve, whereby relative rotation of the internally threaded sleeve and the stem shifts the jaws in the chuck body;
- first formations on the internally threaded sleeve and on the coupling rod and drive sleeve interengageable in the drilling end position to rotationally couple the drive spindle and coupling rod to the drive sleeve and in the tightening end position to rotationally couple the internally threaded sleeve to the drive sleeve;
- and
- second formations on the drive spindle and on a ring gear of the housing interengageable in the tightening position for rotationally coupling the drive spindle to the housing.
9 more elements
Dependencies are inferred from the claim text.