Electrically driven device

An electrically driven device comprising

• a housing (4),
• an electric motor (1) mounted in the housing (4) and comprising a drive shaft (2) having a first rotary axis (I),
• a driven shaft (12) having a second axis (II) and mounted in the housing (4) for performing a movement relative to the housing (4),
• wherein the driven shaft (12) is indirectly coupled to the drive shaft (2) by a gear mechanism comprising a scotch yoke mechanism (5, 7) converting a rotary motion of the drive shaft (2) into a reciprocating motion of the driven shaft (12),
• wherein a drive pin (3) is connected to the drive shaft (2) eccentrically with respect to the rotary axis (I), the scotch yoke mechanism 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 a sliding block (5) having a bearing receiving the drive pin (3), wherein the cross slider (7) is guided in the housing (4) by at least two elastically deformable elements (8), and
• the driven shaft (12) is coupled to the cross slider (7) by a pivotable crank arm (13), thereby converting a rotary motion of the drive shaft (2) into a reciprocating pivoting of the driven shaft (12),
• wherein each of the elastically deformable elements (8) is a leaf spring arranged in the housing (4) such that the spring stiffness in a direction parallel to the first rotary axis (I) exceeds the spring stiffness in a direction perpendicular to the first rotary axis (I).

An electrically driven device comprising

• a housing (4),
• an electric motor (1) mounted in the housing (4) and comprising a drive shaft (2) having a first rotary axis (I),
• a driven shaft (12) having a second axis (II) and mounted in the housing (4) for performing a movement relative to the housing (4),
• wherein the driven shaft (12) is indirectly coupled to the drive shaft (2) by a gear mechanism comprising a scotch yoke mechanism (5, 7) converting a rotary motion of the drive shaft (2) into a reciprocating motion of the driven shaft (12),
• wherein a drive pin (3) is connected to the drive shaft (2) eccentrically with respect to the rotary axis (I), the scotch yoke mechanism 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 a sliding block (5) having a bearing receiving the drive pin (3), wherein the cross slider (7) is guided in the housing (4) by at least two elastically deformable elements (8), and
• the driven shaft (12) is coupled to the cross slider (7) by a pivotable crank arm (13), thereby converting a rotary motion of the drive shaft (2) into a reciprocating pivoting of the driven shaft (12),
• wherein the elastically deformable elements (8) are integrally connected to each other.

An electrically driven device comprising

• a housing (4),
• an electric motor (1) mounted in the housing (4) and comprising a drive shaft (2) having a first rotary axis (I),
• a driven shaft (12) having a second axis (II) and mounted in the housing (4) for performing a movement relative to the housing (4),
• wherein the driven shaft (12) is indirectly coupled to the drive shaft (2) by a gear mechanism comprising a scotch yoke mechanism (5, 7) converting a rotary motion of the drive shaft (2) into a reciprocating motion of the driven shaft (12),
• wherein a drive pin (3) is connected to the drive shaft (2) eccentrically with respect to the rotary axis (I), the scotch yoke mechanism 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 a sliding block (5) having a bearing receiving the drive pin (3), wherein the cross slider (7) is guided in the housing (4) by at least two elastically deformable elements (8), and
• the driven shaft (12) is coupled to the cross slider (7) by a pivotable crank arm (13), thereby converting a rotary motion of the drive shaft (2) into a reciprocating pivoting of the driven shaft (12),
• wherein the elastically deformable elements (8) are connected to a canted portion (11) which is coupled to the cross slider (7) and to the crank arm (13).

An electrically driven device comprising

• a housing (4),
• an electric motor (1) mounted in the housing (4) and comprising a drive shaft (2) having a first rotary axis (I),
• a driven shaft (12) having a second axis (II) and mounted in the housing (4) for performing a movement relative to the housing (4),
• wherein the driven shaft (12) is indirectly coupled to the drive shaft (2) by a gear mechanism comprising a scotch yoke mechanism (5, 7) converting a rotary motion of the drive shaft (2) into a reciprocating motion of the driven shaft (12),
• wherein a drive pin (3) is connected to the drive shaft (2) eccentrically with respect to the rotary axis (I), the scotch yoke mechanism 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 a sliding block (5) having a bearing receiving the drive pin (3), wherein the cross slider (7) is guided in the housing (4) by at least two elastically deformable elements (8), and
• the driven shaft (12) is coupled to the cross slider (7) by a pivotable crank arm (13), thereby converting a rotary motion of the drive shaft (2) into a reciprocating pivoting of the driven shaft (12),
• wherein the driven shaft (12) is pivotably mounted in the housing (4) by a rocker frame (14) which is pivotable with respect to the housing (4) about a pivoting axis (IV) which is perpendicular to the first rotary axis (I) and perpendicular to the extension (III) of the sliding support (6).