Transmission device for a variable displacement drive

An adjustment drive device, comprising:

• a motor;
• and
• a gear device that includes:
• an input gearwheel, to be driven by the motor, the input gearwheel including a double gearwheel having a first gearwheel and a second gearwheel coaxial to and rotationally fixed relative to the first gearwheel, the first gearwheel having a circumference that is less than a circumference of the second gearwheel, and
• an output gearwheel operable to mesh with the input gearwheel so as to be driven by the input gearwheel, the output gearwheel including a double gearwheel having a third gearwheel and a fourth gearwheel coaxial to and rotationally fixed relative to the third gearwheel, the third gearwheel having a circumference that is greater than a circumference of the fourth gearwheel, and
• wherein the input gearwheel and the output gearwheel are positioned relative to one another such that in a first circumferential region of the input gearwheel, a toothing is formed on the first gearwheel which comprises solely one tooth that meshes with a toothing of the third gearwheel, the toothing on the third gearwheel comprising solely one groove meshing therewith;
• and in a second circumferential region of the input gearwheel, a toothing is formed on the second gearwheel which meshes with a toothing of the fourth gearwheel, the second circumferential region extending over at least one-half of the circumference of the input gearwheel;
• so that a translation ratio between the input gearwheel and the output gearwheel in the first circumferential region is different from a translation ratio between the input gearwheel and the output gearwheel in the second circumferential region.

A gear device for a motor vehicle, the gear device comprising:

• an input gearwheel to be driven by a motor, the input gearwheel including a first gearwheel and a second gearwheel coaxial to and rotationally fixed relative to the first gearwheel, the first gearwheel having a circumference that is less than a circumference of the second gearwheel;
• and
• an output gearwheel to be driven by the input gearwheel, the output gearwheel including a third gearwheel and a fourth gearwheel coaxial to and rotationally fixed relative to the third gearwheel, the third gearwheel having a circumference that is greater than a circumference of the fourth gearwheel,
• wherein the input gearwheel and the output gearwheel are positioned relative to one another such that:
• in a first circumferential region of the input gearwheel, toothing formed on the first gearwheel comprises solely one tooth that is to mesh with toothing formed on the third gearwheel, the toothing on the third gearwheel comprising solely one groove meshing therewith;
• in a second circumferential region of the input gearwheel, toothing formed on the second gearwheel is to mesh with toothing formed on the fourth gearwheel, the second circumferential region extending over at least one-half of the circumference of the input gearwheel;
• and
• a translation ratio between the input gearwheel and the output gearwheel in the first circumferential region is different than a translation ratio between the input gearwheel and the output gearwheel in the second circumferential region.