Handheld power tool
AssigneeFelco Motion SA
InventorAlain Zurcher
Life of this patent
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Abstract
The invention relates to a handheld power tool (1), including: a mobile element (100) and a stationary element (102); a rotatable actuator; a ball nut (200); a ball screw (202) having a first end (202a) connected to the mobile element (100); and a universal joint (10, 12, 14) arranged so as to be driven by the rotatable actuator and so as to rotate the ball nut (200) on said ball screw (202) in order to move the ball screw (202), and thus the mobile element (100), relative to the stationary element (102). The universal joint can be advantageously retained inside two concentric spherical bearings (50a, 60a, 70a, 80a), thus making it possible to take up the axial forces in two directions. It is thus possible to eliminate any radial force on the ball screw (202) and have angularly variably rotational output.
Claims15
A handheld power tool comprising
- a movable element and a fixed element
- a rotatable actuator having a first axis of rotation
- a ball nut having a second axis of rotation
- a ball screw having a first end connected to the movable element
- universal joint configured to be driven by said rotatable actuator and to rotate the ball nut on the ball screw so as to move said ball screw and thus said movable element relative to said fixed element.
A method for transmitting forces in a handheld power tool comprising a movable element and a fixed element, said method comprising the followings steps:
- driving a universal joint by a rotatable actuator
- rotating a ball nut on a ball screw via said universal joint inserted in two spherical bearings, said ball screw having an end connected to said movable element
- moving said ball screw and thus said movable element relative to said fixed element.
Dependencies are inferred from the claim text.