Planetary Gearbox Static Coupling for Integrated Torque Sensing
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Solution Overview
Problem
Existing planetary gearbox systems require additional measuring devices to detect transmitted drive torque, increasing complexity, cost, and risk of damage due to the need for external components between non-static elements.
Innovation Solution
Integration of a static coupling member with embedded measuring sensors, such as strain gauges, within the gearbox to detect torque directly, eliminating the need for external devices and simplifying configuration and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an additional measuring device is placed between the output drive shaft and the drill, then torque measurement capability is achieved, but device complexity and cost increase
Solution Approach 1:
The patent merges the torque measurement function with the existing static coupling member of the planetary gearbox. The strain gauge sensor is integrated into the static coupling member, combining the structural support function with the torque sensing function into a single component, thereby eliminating the need for separate external measuring devices
Solution Approach 2:
The static coupling member is given dual functionality: it continues to serve as the structural component that supports the planetary gears while simultaneously acting as the torque sensing element through the integrated strain gauge sensor, making it a multi-functional component
2Measurement precision
If an additional measuring device is placed between the output drive shaft and the drill, then torque measurement capability is achieved, but cost increases
Solution Approach 1:
The patent combines the torque sensing function with the existing static coupling member, eliminating the need to manufacture and purchase separate external measuring devices. This integration reduces overall system cost by using an existing component for dual purposes
Solution Approach 2:
The static coupling member serves itself by incorporating the strain gauge sensor directly into its structure. The component that already exists in the gearbox (the static coupling member) now provides both its original structural function and the additional torque measurement function without requiring external additions
3Measurement precision
If a measuring device is placed between the gearbox drive shaft and the tool, then torque measurement capability is achieved, but the risk of damage increases
Solution Approach 1:
The patent integrates the sensor into the static coupling member that is already part of the gearbox structure. This eliminates the need for separate external measuring devices that would be vulnerable to damage, as the sensing element is now protected within the gearbox's own structural component
Solution Approach 2:
The static coupling member acts as an intermediary that protects the strain gauge sensor. By embedding the sensor within the static coupling member rather than placing it externally between the drive shaft and tool, the sensor is shielded from the harsh operational environment and potential damage
4Measurement precision
If an additional measuring device is used, then torque measurement capability is achieved, but configuration and maintenance complexity increases
Solution Approach 1:
The patent merges the torque measurement function into the existing gearbox structure through the static coupling member. This integration eliminates the need for separate configuration steps and maintenance procedures for external devices, as the sensing system is now part of the gearbox itself and follows the same operational protocols
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 torque measurement without additional components, reducing complexity and risk of damage, while maintaining standard gearbox dimensions and functionality.
Implementation Method 1
The static coupling member 8 is provided with at least one measuring sensor 9, in particular comprising at least one strain gauge
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
The upgraded planetary gearbox (1) comprises an input support (2) provided with an input transmission element (3) axially rotatable and connectable to an external appliance, an output support (4) provided with an output transmission element (5) axially rotatable and connectable to an external appliance or to an external tool, at least one planetary wheelwork (6, 7) operationally placed between the input transmission element (3) and the output transmission element (5), and a static coupling member (8) between the planetary wheelwork (6, 7) and at least one of either the input support (2) or the output support (4), wherein at least one of the static coupling member (8), the input support (2) and the output support (4) comprises a measuring sensor (9) for measuring the drive torque transmitted by the output transmission element (5).