Offset-Axle Camming Head for Wider Cam Range
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Solution Overview
Problem
Smaller active camming devices have a limited cam range due to the smaller space within which the cam lobes can rotate, and increasing the camming range often compromises performance, reliability, and durability.
Innovation Solution
The use of an axle with multiple offset radial regions allows the cam lobes to articulate without interference, increasing the camming range while maintaining performance and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the camming range is increased by using conventional designs, then the camming range expands, but the device size and weight increase proportionally
Solution Approach 1:
The patent applies dimensionality change by transitioning from a two-dimensional cam lobe rotation plane to a three-dimensional configuration where cam lobes rotate on offset axles. This allows the cam lobes to articulate through multiple planes and orientations, effectively increasing the camming range without proportionally increasing the device's external dimensions. The offset radial regions create a three-dimensional articulation space that maximizes the utilization of available volume.
Solution Approach 2:
The patent implements nesting by placing multiple cam lobes and their respective axles within a compact head member structure. The offset radial regions allow cam lobes to be nested closely together while maintaining independent rotation capabilities. This nested arrangement enables multiple camming actions within a single device unit, expanding the effective camming range without requiring proportional increases in device size.
2Adaptability or versatility
If the camming range is increased by using multiple axles, then the camming range expands, but geometrical interference between cam lobes increases
Solution Approach 1:
The patent applies asymmetry by positioning the axles at offset radial regions rather than in a symmetric arrangement. The axles are located at different radial distances and angular positions around the terminal, creating an asymmetric configuration that eliminates geometrical interference between cam lobes. This asymmetric placement allows each cam lobe to articulate through its full range of motion without collision or interference from adjacent cam lobes.
Solution Approach 2:
The patent resolves geometrical interference by moving the problem from a two-dimensional plane to three-dimensional space. The offset radial regions create vertical and radial separation between axles that cannot be achieved in a single plane. This three-dimensional arrangement allows cam lobes to rotate without interference by utilizing the additional spatial dimension provided by the offset configuration.
3Volume of moving object
If the axle diameter is reduced for smaller devices, then the device size decreases, but the minimum axle diameter to cam lobe size ratio becomes problematic
Solution Approach 1:
The patent overcomes the axle diameter limitation by transitioning to a three-dimensional offset configuration. Instead of relying solely on increasing axle diameter to prevent interference, the offset radial regions create separation in multiple dimensions (radial, tangential, and axial). This allows smaller axles to function effectively because the offset positioning provides sufficient clearance without requiring larger axle diameters.
Solution Approach 2:
The patent segments the rotation space by dividing it into multiple offset radial regions, each dedicated to a specific cam lobe. This segmentation allows each cam lobe to have its own dedicated articulation zone, eliminating the need for oversized axles to prevent interference. The segmentation of space enables efficient use of small axle diameters while maintaining adequate clearance for camming operations.
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 offset radial regions on the axle enable increased camming range without compromising the performance and reliability of the active camming device, addressing the limitations of conventional smaller active camming devices.
Implementation Method 1
The cam lobes on an active camming device are generally spring biased into an expanded position
Data Source
AI summary
A smaller-active camming device including a head member, a plurality of cam lobes, a retraction system, and a connection system. The head member includes a terminal and an axle. The axle comprises a unique configuration of multiple radial regions extending from opposite sides of the terminal. The radial regions of the axle are offset with respect to one another along at least one three dimensional axis. The offset of the radial regions is configured to reduce the geometrical interference of the cam lobes across the camming range.