US 2018/0087631 A1Published application

Electrically driven device

AssigneeBraun GmbH

InventorsAndreas KRAMP, Thomas FRITSCH, Norbert SCHAEFER

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Abstract

An electrically driven device includes a housing, an electric motor with a drive shaft having a first rotary axis and a drive pin eccentrically connected to the drive shaft, and a driven shaft having a second rotary axis and mounted in the housing for a pivoting movement. The driven shaft is coupled to the drive pin by a gear mechanism converting a rotary motion of the drive shaft into the reciprocating pivoting of the driven shaft. The gear mechanism has first and second transmission stages, the former including a cross slider, and the latter an elastically deformable transmission member. The cross slider has a sliding support extending perpendicular to the first rotary axis and receiving the drive pin. The cross slider is axially guided in the housing to move in an axial direction perpendicular to the first rotary axis and perpendicular to the extension of the sliding support. A link, offset relative to the second rotary axis, connects the cross slider to the elastically deformable transmission member.

Claims15

Dependent claims

An electrically driven device comprising

a housing (4),
an electric motor (1) with a drive shaft (2) having a first rotary axis (I) and a drive pin (3) connected to the drive shaft (2) eccentrically with respect to the rotary axis (I),
a driven shaft (11) having a second rotary axis (II) and mounted in the housing (4) for performing a pivoting about the second rotary axis (II),
wherein the driven shaft (11) is indirectly coupled to the drive pin (3) by a gear mechanism converting a rotary motion of the drive shaft (2) into a reciprocating pivoting of the driven shaft (11), the gear mechanism comprising an elastically deformable transmission member (13),
wherein the gear mechanism comprises a first transmission stage and a second transmission stage, wherein the first transmission stage comprises
a cross slider (7) having a sliding support (6) which extends perpendicular to the first rotary axis (I) and which receives the drive pin (3) either directly or by means of a sliding block (5) having a bearing receiving the drive pin (3), wherein the cross slider (7) is axially guided in the housing (4) to be movable in an axial direction perpendicular to the first rotary axis (I) and perpendicular to the extension (III) of the sliding support (6), and
a link (10) located offset with respect to the second rotary axis (II) and connecting the cross slider (7) to the elastically deformable transmission member (13), and
wherein the second transmission stage comprises the elastically deformable transmission member (13).

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/715,095Filed 25 Sep 2017
Priority: EP 16191023.728 Sep 2016
Published: 29 Mar 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification15 codes

F16H 21/40
All movement being in, or parallel to, a single plane: for interconverting rotary motion and oscillating motion
A61C 1/185
Flexible shafts; Clutches or the like; Bearings or lubricating arrangements; Drives or transmissions: drives or transmissions
A61C 17/221
With brushes, cushions, cups, or the like: control arrangements therefor
A61C 17/225
With brushes, cushions, cups, or the like: handles or details thereof