Concentric Double Axis Bevel Gear Mechanism
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Solution Overview
Problem
In concentric double axis mechanisms, the actuator for one axis often becomes a load for the actuator of the other axis, particularly causing disadvantages during high-speed driving.
Innovation Solution
A concentric double axis mechanism with bevel gears is designed such that the driving bevel gear is placed concentrically and independently supported, allowing the axis-B to be driven without interference with axis-A, and the axis-A actuator is not a load for the axis-B actuator, and vice versa, using a configuration where the driving bevel gear is meshed with a follower bevel gear connected to axis-B.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the actuator for driving axis-A is used in a conventional concentric double axis mechanism, then the mechanism can drive both axes, but the actuator for axis-A becomes a load for the axis-B actuator, particularly causing disadvantages during high-speed driving
Solution Approach 1:
The mechanism is segmented into two independent drive systems: axis-A has its own actuator (11) and drive pulley (4), while axis-B has its own actuator (12) and drive pulley (6). The bevel gears (7, 8) are positioned to transmit motion between axes without creating load interference, allowing each actuator to operate independently at high speeds without bearing unwanted loads from the other axis.
2Ease of operation
If the actuator for driving axis-A is used in a conventional concentric double axis mechanism, then the mechanism can drive both axes, but the actuator for axis-B becomes a load for the axis-A actuator
Solution Approach 1:
The disturbing load relationship is extracted by positioning the bevel gears (7, 8) and their associated drive pulleys (4, 6) such that the rotational paths of axis-A and axis-B are geometrically separated. This extraction eliminates the harmful load interaction while preserving the useful motion transmission function, allowing independent control of both axes without mutual interference.
3Speed
If high-speed driving is implemented in a conventional concentric double axis mechanism, then the driving speed increases, but the actuator becomes a load for the other actuator causing great disadvantage
Solution Approach 1:
The solution moves the gear interaction to a different spatial dimension by using bevel gears with specific pitch angle geometry. The drive pulleys (4, 6) and bevel gears (7, 8) are arranged so that motion transmission occurs through a dimensional transformation that eliminates load coupling between axes, enabling high-speed operation with maintained reliability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enables high-speed driving without either actuator becoming a load for the other, enhancing performance by isolating the load-bearing responsibilities between the two axes.
Implementation Method 1
a driving bevel gear (7) which is placed concentrically and is free from any interference with the axis-A, and which is supported rotatably around a center axis line common with the axis-A; a follower bevel gear (8) which is connected and fixed to the axis-B concentrically while meshing with the driving bevel gear (7)
Data Source
AI summary
In a concentric double axis mechanism (1); a driving bevel gear (7) is placed concentrically with and freely from any interference with an axis-A (3), a follower bevel gear (8) is meshed with the driving bevel gear (7), and an axis-B (9) is concentrically connected and fixed to the follower bevel gear (8). Since the driving bevel gear (7) is driven by the axis-B actuator (12) that is independent from the axis-A actuator (11), the axis-B (9) can be driven being free from any interference with the axis-A (3). The axis-A actuator (11) does not become a load for the axis-B actuator (12), nor does the axis-B actuator (12) become a load for the axis-A actuator (11).