Oscillating mechanism for a power tool
AssigneesRobert Bosch Tool Corporation, Robert Bosch GmbH
InventorsJeremy Rubens, Jaime Moreno Terrazas
Life of this patent
Estimating the term…
Abstract
An oscillating power tool includes a drive motor (M) producing rotary motion and an oscillating mechanism (30) for converting the motor rotary motion to an oscillatory side-to-side movement. The oscillating mechanism (30) includes a link (32) driven by an eccentric shaft (16) of the motor (M), a drive arm (40) that drives the hub (45) of the working tool (B) in oscillating motion, and a bearing arrangement (37) between the drive arm (40) and the link (32) that isolates relative rotation and translation between the components while still imparting an oscillatory motion to the drive arm (40).
Claims17
A power tool comprising:
- a drive motor having an eccentric drive shaft with an axis of rotation;
- a tool holder adapted to support a working tool for oscillating rotational motion;
- and
- an oscillating mechanism disposed between said eccentric drive shaft and said tool holder, said oscillating mechanism including:
- an elongated link mounted at one end thereof on said eccentric drive shaft for eccentric movement upon rotation of said drive shaft about said axis of rotation and including on an opposite end thereof a roller bearing having a loose fit with a small amount of play between an inner race and rollers of the bearing, and/or between the rollers and an outer race of the bearing in a radial direction relative to said axis of rotation of said drive shaft;
- and
- an elongated drive arm having;
- a first end coupled to said roller bearing of said link in a manner to isolate relative rotation and translation between said link and said drive arm while still imparting an oscillatory motion in one direction to said drive arm;
- and
- a second end engaged to said tool holder to transfer the oscillatory motion to oscillating rotational motion of said tool holder.
A power tool comprising:
- a drive motor having an eccentric drive shaft;
- a tool holder adapted to support a working tool for oscillating rotational motion;
- and
- an oscillating mechanism disposed between said eccentric drive shaft and said tool holder, said oscillating mechanism including:
- a link mounted on said eccentric drive shaft for eccentric movement upon rotation of said drive shaft;
- and
- an elongated drive arm having;
- a first end coupled to said link in a manner to isolate relative rotation and translation between said link and said drive arm while still imparting an oscillatory motion in one direction to said drive arm;
- and
- a second end engaged to said tool holder to transfer the oscillatory motion to oscillating rotational motion of said tool holder, wherein
- the drive shaft defines an axis along the length of said drive shaft;
- the drive motor defines a longitudinal axis parallel to said axis of the drive shaft;
- said tool holder is supported along said longitudinal axis;
- and
- said elongated drive arm is arranged at an angle between said link and said tool holder, said angle being non-parallel and non-perpendicular to said longitudinal axis.
A power tool comprising:
- a drive motor having an eccentric drive shaft;
- a tool holder adapted to support a working tool for oscillating rotational motion;
- and
- an oscillating mechanism disposed between said eccentric drive shaft and said tool holder, said oscillating mechanism including:
- a link mounted on said eccentric drive shaft for eccentric movement upon rotation of said drive shaft;
- and
- an elongated drive arm having;
- a first end coupled to said link in a manner to isolate relative rotation and translation between said link and said drive arm while still imparting an oscillatory motion in one direction to said drive arm;
- and
- a second end engaged to said tool holder to transfer the oscillatory motion to oscillating rotational motion of said tool holder, wherein
- said eccentric drive shaft includes two eccentric portions;
- said link is mounted to one of said two eccentric portions;
- and
- a second link is mounted to the other of said two eccentric portions, said second link coupled to a second drive arm for another working tool.
An oscillating mechanism for a power tool, the oscillating mechanism engaged between an eccentric drive shaft of the power tool and a tool holder adapted to support a working tool for oscillating rotational motion, the drive shaft having an axis of rotation, the oscillating mechanism comprising:
- an elongated link mounted at one end thereof on said eccentric drive shaft for eccentric movement upon rotation of said drive shaft about said axis of rotation and including on an opposite end thereof a roller bearing having a loose fit with a small amount of play between an inner race and rollers of the bearing, and/or between the rollers and an outer race of the bearing in a radial direction relative to said axis of rotation of said drive shaft;
- and
- an elongated drive arm having;
- a first end coupled to said roller bearing of said link in a manner to isolate relative rotation and translation between said link and said drive arm while still imparting an oscillatory motion in one direction to said drive arm;
- and
- a second end engageable to the tool holder to transfer the oscillatory motion to oscillating rotational motion of said tool holder.
Dependencies are inferred from the claim text.