Planetary Gearbox Static Coupling for Integrated Torque Sensing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing planetary gearboxes require additional measuring devices to detect transmitted drive torque, increasing complexity, cost, and risk of damage due to their placement between non-static elements.
Innovation Solution
Integration of a static coupling member with a measuring sensor, such as a strain gauge, within the planetary gearbox to directly measure drive torque, eliminating the need for external devices and simplifying configuration and use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an additional measuring device is placed between the output drive shaft and the drill to detect transmitted torque, then torque measurement capability is improved, but device complexity and cost increase
Solution Approach 1:
The patent merges the torque measurement function with the planetary gearbox structure by integrating a strain gauge directly into the satellite holder component. This eliminates the need for separate external measuring devices and their associated mounting, wiring, and configuration systems, thereby reducing overall device complexity while maintaining torque measurement capability.
Solution Approach 2:
The satellite holder is designed to serve multiple functions: it supports the satellite gears during normal operation and simultaneously acts as a measurement element for torque detection through the integrated strain gauge. This multi-functionality reduces the number of separate components needed in the system.
2Measurement precision
If an additional measuring device is placed between the output drive shaft and the drill to detect transmitted torque, then torque measurement capability is improved, but cost increases
Solution Approach 1:
By combining the torque measurement function with the existing satellite holder component, the patent eliminates the need to manufacture and purchase separate external measuring devices. The strain gauge is integrated directly into a component that already exists in the gearbox assembly, reducing overall manufacturing cost.
Solution Approach 2:
The satellite holder serves itself by incorporating the strain gauge, allowing the gearbox to perform both its mechanical function and torque measurement function without requiring additional external devices. This self-service approach reduces the need for separate measurement systems and their associated costs.
3Measurement precision
If a measuring device is placed between the gearbox drive shaft and the tool to detect transmitted torque, then torque measurement capability is improved, but the risk of damaging the measuring device increases due to placement between non-static elements
Solution Approach 1:
The strain gauge is integrated into the satellite holder, which is a structural component of the gearbox that is designed to withstand mechanical loads. This integration protects the measuring element from the harsh conditions that would affect an external device placed between the drive shaft and tool, as the strain gauge is embedded within a robust mechanical structure.
Solution Approach 2:
The satellite holder acts as an intermediary structure that protects the strain gauge from direct exposure to the harsh operating conditions between the drive shaft and tool. By embedding the measuring element within this protective structural component, the system reduces the risk of damage to the measuring device.
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
Enables accurate and cost-effective measurement of transmitted torque without additional components, reducing complexity and risk of damage, while being easy to use and configure.
Implementation Method 1
at least one of said static coupling member, said input support and said output support includes at least one measuring sensor for measuring the drive torque transmitted by said output transmission element
Data Source
AI summary
The subject matter described herein includes an upgraded planetary gearbox including an input support provided with an input transmission element axially rotatable and connectable to an external appliance, an output support provided with an output transmission element axially rotatable and connectable to an external appliance or to an external tool, at least one planetary wheelwork operationally placed between the input transmission element and the output transmission element, and a static coupling member between the planetary wheelwork and at least one of either the input support or the output support, wherein at least one of the static coupling member, the input support and the output support includes a measuring sensor for measuring the drive torque transmitted by the output transmission element.