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US 8,998,684 B2Granted
Apparatus for the tooling of a workpiece
AssigneeCembre S.p.A.
InventorsGiovanni Rosani, Gualtiero Barezzani, Gianpaolo Luciani
Life of this patent
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Abstract
A portable apparatus (1) for the tooling of a workpiece (9) comprises a motor (3) with a cyclic movement output member (4), a tool holder (5) adapted to carry a tool (6) and a movement transmitter (7) engaging the motor output member (4) and the tool holder (5) to set the tool holder (5) in a cyclic movement, wherein the movement transmitter (7) comprises a transmission ratio adjuster (8) that, in response to a preset reduction of the cyclic movement speed (ω_m) of the output member (4) of the motor, increases the transmission ratio (ω_m/ω_ph) thereby reducing the cyclic movement speed (ω ph) of the tool holder (5) with respect to the cyclic movement speed (ω_m) of the output member (4) of the motor (3).
Claims16
Apparatus for the tooling of a workpiece, comprising:
- a motor with a cyclic movement output member,
- a tool holder adapted to carry a tool and a movement transmitter engaging the motor output member and the tool holder to set the tool holder in a cyclic movement,
- wherein the movement transmitter comprises:
- a transmission ratio adjuster that, in response to a preset reduction of the cyclic movement speed of the motor output member, automatically increases the transmission ratio thereby reducing the cyclic movement speed of the tool holder with respect to the cyclic movement speed of the output member of the motor,
- a motor pulley coupled so as to rotate with a drive shaft,
- a driven pulley coupled so as to rotate with a tool holder shaft, and
- a belt wound around the motor pulley and the driven pulley, wherein said motor pulley has a first belt seat, the diameter of which is adjusted through centrifugal fore,
- wherein said motor pulley comprises:
- a first half-pulley and a second half-pulley that together define a first belt seat with inclined side surfaces, the second half-pulley being moveable with respect to the first half-pulley to move the first belt seat and the belt radially outwards or inwards,
- two or more thrusting bodies having a calibrated mass and received in thrusting seats formed by a thrusting surface of at least one of the two half-pulleys and an abutment surface, configured so as to transform the centrifugal thrust of the thrusting bodies into said relative movements of the half-pulleys.
7 more elements
Apparatus for the tooling of a workpiece, comprising:
- a motor with a cyclic movement output member,
- a tool holder adapted to carry a tool and a movement transmitter engaging the motor output member and the tool holder to set the tool holder in a cyclic movement,
- wherein the movement transmitter comprises:
- a transmission ratio adjuster that, in response to a preset reduction of the cyclic movement speed of the motor output member, automatically increases the transmission ratio thereby reducing the cyclic movement speed of the tool holder with respect to the cyclic movement speed of the output member of the motor,
- a motor pulley coupled so as to rotate with a drive shaft,
- a driven pulley coupled so as to rotate with a tool holder shaft, and
- a belt wound around the motor pulley and the driven pulley,
- said motor pulley having a first belt seat the diameter of which is automatically adjusted through centrifugal force, wherein a variation of the diameter of said first belt seat brings about a variation of the tension of the belt,
- said driven pulley having a second belt seat, the diameter of which is automatically adjusted through the tension of the belt, thereby inversely varying the diameter of the second belt seat with respect to said variation of the diameter of said first belt seat.
6 more elements
Apparatus for the tooling of a workpiece, comprising:
- a motor with a cyclic movement output member,
- a tool holder adapted to carry a tool and a movement transmitter engaging the motor output member and the tool holder to set the tool holder in a cyclic movement,
- wherein the movement transmitter comprises:
- a transmission ratio adjuster that, in response to a preset reduction of the cyclic movement speed of the motor output member, automatically increases the transmission ratio thereby reducing the cyclic movement speed of the tool holder with respect to the cyclic movement speed of the output member of the motor,
- a motor pulley coupled so as to rotate with a drive shaft,
- a driven pulley coupled so as to rotate with a tool holder shaft, and
- a belt wound around the motor pulley and the driven pulley, said drive shaft and said tool holder shaft being arranged at a fixed distance to one another, said motor pulley having a first belt seat the diameter of which is automatically adjusted through centrifugal force, wherein a variation of the diameter of said first belt seat brings about a variation of the tension of the belt,
- said driven pulley having a second belt seat, the diameter of which is automatically adjusted through the tension of the belt, thereby inversely varying the diameter of the second belt seat with respect to said variation of the diameter of said first belt seat, so that:
- a reduction of the cyclic movement speed of the motor output member decreases the diameter of the motor pulley first belt seat and increases the diameter of the driven pulley second belt seat, while keeping said drive shaft and said tool holder shaft at said fixed distance to one another, and
- an increase of the cyclic movement speed of the motor output member increases the diameter of the motor pulley first belt seat and decreases the diameter of the driven pulley second belt seat, while keeping said drive shaft and said tool holder shaft at said fixed distance to one another.
7 more elements
Dependencies are inferred from the claim text.