Movable-Axis Gear Transmission for High Ratio With Lower Forces
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Solution Overview
Problem
Existing transmissions face challenges in maintaining low force levels, particularly when achieving certain transmission ratios, which can result in large forces and inefficiencies.
Innovation Solution
The transmission incorporates a gearwheel drive for rotating the main gearwheel about its axis and a gearwheel bearing drive to move the gearwheel bearing, orienting the movement of the engagement zone and circumferential movement in opposite directions, thereby increasing the main gearwheel's speed without requiring smaller gearwheel diameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If particularly small gearwheels are in engagement with comparatively large gearwheels to achieve certain transmission ratios, then the desired transmission ratio is obtained, but large forces arise in the transmission
Solution Approach 1:
The invention makes the rotation axis of the main gearwheel movable instead of fixed. The gearwheel bearing is displaced in the circumferential direction by a bearing drive, creating a dynamic system where the rotation axis moves during operation. This dynamic configuration allows the main gearwheel to rotate about its own axis while its rotation axis simultaneously moves in the circumferential direction, enabling speed increase without requiring small gearwheel diameters that would generate large forces
Solution Approach 2:
The invention adds a second degree of freedom by allowing the rotation axis of the main gearwheel to move in the circumferential direction. Instead of only rotating about a fixed axis, the gearwheel now has both rotational motion about its axis and translational motion of its axis in the circumferential direction. This dimensional change enables the main gearwheel to achieve higher speeds while maintaining larger gearwheel diameters, thereby avoiding large force generation
2Speed
If the main gearwheel rotates about its rotation axis to achieve speed increase, then the speed of rotation increases, but large forces are generated when using small gearwheel diameters
Solution Approach 1:
The invention makes the rotation axis of the main gearwheel movable instead of fixed. The gearwheel bearing is displaced in the circumferential direction by a bearing drive, creating a dynamic system where the rotation axis moves during operation. This dynamic configuration allows the main gearwheel to rotate about its own axis while its rotation axis simultaneously moves in the circumferential direction, enabling speed increase without requiring small gearwheel diameters that would generate large forces
Solution Approach 2:
The invention adds a second degree of freedom by allowing the rotation axis of the main gearwheel to move in the circumferential direction. Instead of only rotating about a fixed axis, the gearwheel now has both rotational motion about its axis and translational motion of its axis in the circumferential direction. This dimensional change enables the main gearwheel to achieve higher speeds while maintaining larger gearwheel diameters, thereby avoiding large force generation
Data Source
AI summary
The invention relates to a transmission (1) with a transmission input and a transmission output, with a main gearwheel, which is interposed between the transmission input and the transmission output and which is rotatably mounted about a rotation axis (20) and to which a gearwheel bearing (17) is assigned that can be moved perpendicularly to the rotation axis (20), with a gearwheel drive (21), which serves for rotating the main gearwheel about the rotation axis and with which the main gearwheel (19) is in engagement in an engagement zone (26), and with a gearwheel bearing drive (14), which serves for moving the gearwheel bearing (17) (17). When a torque is input at the transmission input, the gearwheel drive (21) rotates the main gearwheel (19) about the rotation axis. The gearwheel bearing drive (14) causes a movement of the engagement zone (26), wherein the movement of the engagement zone (26) and a circumferential movement of the main gearwheel (19) in the engagement zone (26) are oriented in opposite directions.