Surgical instrument and steering mechanism therefor

A steering gear for a surgical instrument, arranged at a proximal end of a shaft which defines a longitudinal axis and has a deflection mechanism at a distal end of the shaft, wherein the steering gear comprises:

• two motorized drives configured to spatially orient a wobble plate by way of a respective adjustment angle of the two motorized drives, the wobble plate is configured to control the distal deflection mechanism at the distal end of the shaft;
• wherein the two motorized drives include a first drive and a second drive, the first drive includes a first drive shaft which is driven by a first motor and operatively connected to a first traction mechanism plate of a first drive wheel via a first traction mechanism arranged between the first traction mechanism plate and a first spindle which is seated on the first drive shaft, which defines a first drive axis, and
• the second drive includes a second drive shaft which is driven by a second motor and operatively connected to a second traction mechanism plate of a second drive wheel via a second traction mechanism arranged between the second traction mechanism plate and a second spindle which is seated on the second drive shaft, which defines a second drive axis,
• wherein the first and the second drive wheel are designed as double gear wheels and each comprises the corresponding traction mechanism plate and a bevel gear rim present on a respective backward side, and wherein
• the wobble plate is arranged between the first drive wheel and the second drive wheel, which have a common axis of rotation, and the bevel gear rims are arranged facing one another on the axis of rotation.