Coaxial Gear Cam Structure for High Torque in Less Space
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Solution Overview
Problem
Existing coaxial gear transmissions face limitations in torque transmission, complexity, and space requirements, often requiring numerous parts and complex assembly, leading to inefficiencies and a larger footprint.
Innovation Solution
A coaxial gear design featuring an axially aligned toothing integrated with the housing, a tooth carrier with axially aligned guides, and a cam driven by a rotatable adjusting element with rolling bearings, allowing for axial displacement of teeth and adjustable torsional backlash, resulting in a compact, simplified structure capable of high torque transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If existing coaxial gear transmissions are designed to transmit high torques, then torque transmission capability is improved, but the number of individual parts and assembly complexity increases
Solution Approach 1:
The patent merges the adjusting element and cam disc into a single integrated component, eliminating the need for separate bearing components. This integration maintains high torque transmission capability while reducing the total number of parts and simplifying assembly operations, directly resolving the contradiction between torque capability and device complexity
2Force
If hollow shaft gears are designed to transmit high torques, then torque transmission is improved, but the space required in radial and axial directions increases
Solution Approach 1:
The patent employs a cam mechanism that converts rotational motion into axial displacement of teeth dynamically. This dynamic approach allows the gear to maintain compact radial and axial dimensions while achieving high torque transmission through the mechanical advantage of the cam profile, resolving the contradiction between torque capability and volume requirements
3Device complexity
If a simplified construction with fewer parts is used, then device complexity is reduced, but torque transmission capability may be compromised
Solution Approach 1:
By integrating the adjusting element and cam disc into one component, the patent achieves simplified construction with fewer parts while maintaining torque transmission capability through the inherent mechanical advantage of the cam mechanism and the rigid tooth engagement design
Solution Approach 2:
The patent optimizes the cam profile geometry and tooth arrangement parameters to ensure that the simplified design with integrated components can transmit high torques, balancing construction simplicity with force transmission capability
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
The design achieves high torque transmission with a reduced number of parts, simplified assembly, and a compact footprint, while maintaining rigidity and load capacity through the use of rigid teeth and optimized bearing segments, enabling precise axial force transmission.
Implementation Method 1
at least one bearing with rolling elements is arranged between the adjusting element and the cam disc
Data Source
Figure 1
Figure 2~4
Figure 5A~5C
AI summary
Coaxial gear (1), comprising a toothing (5) axially aligned with respect to an axis of rotation (3) of the coaxial gear (1); a tooth carrier (7) with axially aligned guides (9); teeth (11) which are received in the guides (9) for engagement with the toothing (5), wherein the teeth (11) are axially aligned with their respective longitudinal axes in the guides (9) and are axially displaceable in the guides (9); a cam disk (15) rotatable about the axis of rotation (3) for axially driving the teeth (11); and a housing (31) in which an adjusting element (16) is provided for supporting the cam disk (15), wherein at least one bearing with rolling elements (14) is arranged between the adjusting element and the cam disk (15).