Hand-held machine tool
AssigneeRobert Bosch GmbH
InventorZoltan Kocsis
Life of this patent
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Abstract
There is a hand-held machine tool, in particular a saber saw, with a housing, a drive motor with an output shaft, a spindle for receiving a tool, in particular a saw blade, and a motion converter for converting a rotational motion of the drive shaft into a reciprocating motion of the spindle. The motion converter comprises an eccentric element driven by the output shaft rotationally about an axis of rotation with a driver part arranged eccentrically to the axis of rotation, and a pendulum element which is mounted pivotably about a bearing point and is connected via a coupling point to the spindle. The pendulum element has a guide element for guiding the driver part. In one embodiment, the guide element is arranged between the bearing point and coupling point.
Claims14
A saber saw, comprising:
- a housing;
- a drive motor with an output shaft;
- a spindle configured to clamp a saw blade on one end in a cantilevered manner such that the saw blade extends away from the housing and to drive the saw blade;
- and
- a motion converter configured to convert a rotational motion of the output shaft into a reciprocating motion of the spindle, wherein:
- the motion converter has an eccentric element driven by the output shaft rotationally about an axis of rotation with a driver part arranged eccentrically to the axis of rotation, and a pendulum element which is mounted pivotably about a bearing point and is connected via a coupling point to the spindle;
- the pendulum element has a guide element configured to guide the driver part;
- the guide element is arranged between the bearing point and the coupling point;
- the bearing point and the coupling point define a first axis of the pendulum element;
- and
- the guide element allows motion of the driver part relative to the pendulum element in a direction along the first axis of the pendulum element, and largely prevents motion of the driver part relative to the pendulum element in a direction perpendicular to the first axis of the pendulum element.
A motion converter of a saber saw, the motion converter configured to convert a rotational motion of an output shaft of a drive motor of the saber saw into a reciprocating motion of a spindle of the saber saw, the spindle configured to clamp one end of a saw blade in a cantilevered manner such that the saw blade extends away from a housing of the saber saw, the motion converter comprising:
- an eccentric element driven by the output shaft rotationally about an axis of rotation with a driver part arranged eccentrically to the axis of rotation;
- and
- a pendulum element with a first end mounted pivotably at a bearing point and a coupling point connected to the spindle, wherein:
- the pendulum element has a guide element configured to guide the driver part;
- the guide element is arranged between the bearing point and the coupling point;
- the bearing point and the coupling point define a first axis of the pendulum element;
- and
- the guide element allows motion of the driver part relative to the pendulum element in a direction along the first axis of the pendulum element, and largely prevents motion of the driver part relative to the pendulum element in a direction perpendicular to the first axis of the pendulum element.
Dependencies are inferred from the claim text.