Magnetostrictive Torque Sensor Axial Cable Routing
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Solution Overview
Problem
The existing magnetostrictive torque sensors face challenges in simplifying the attachment process due to complex cable management, which increases assembly steps and costs.
Innovation Solution
The proposed magnetostrictive torque sensor design includes a holder with a recessed accommodating portion and a cover with a connector support portion, allowing for easier attachment by simplifying cable management and reducing the need for multiple resin housing molds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If signal wires are bundled into a cable inside a square tube-shaped guide portion that protrudes radially from the resin housing, then the cable can be routed to external space, but the attachment process becomes complicated and assembly costs increase
Solution Approach 1:
The patent extracts the cable routing function from the radial guide portion and relocates it to the axial direction. The guide portion is reconfigured to guide the cable in the axial direction from the detection coil side toward the opening side, separating the cable management function from the housing structure and simplifying the overall assembly process.
Solution Approach 2:
Instead of having the guide portion protrude radially outward to route the cable externally, the patent inverts the approach by having the guide portion extend axially within the housing toward the opening. This reversal of the routing direction eliminates the need for complex external cable management and reduces assembly complexity.
2Adaptability or versatility
If the shape of the guide portion is changed to accommodate different attachment scenarios, then cable connection becomes more flexible, but multiple resin housing molds are required increasing manufacturing costs
Solution Approach 1:
The patent creates a universal guide portion structure that performs multiple functions: it guides the cable in the axial direction, provides structural support, and accommodates different attachment scenarios without requiring shape changes. This single standardized design can be used across different applications, eliminating the need for multiple specialized molds and reducing manufacturing costs.
Solution Approach 2:
Instead of changing the geometric shape of the guide portion to adapt to different scenarios, the patent uses parameter changes in the cable routing path (axial direction) and the positioning of the opening to achieve versatility. The guide portion maintains a consistent standardized shape while adapting to different applications through configuration changes in how it is integrated with the housing and opening.
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 design enables easier attachment to a fixed portion, reduces manufacturing costs, and simplifies the assembly process by minimizing the complexity of cable management.
Implementation Method 1
a magnetostrictive torque sensor that measures a torque applied to a rotating shaft by utilizing an inverse magnetostrictive effect that occurs in the rotating shaft when torque is applied to the rotating shaft
Data Source
AI summary
A magnetostrictive torque sensor has: a holder having an inner cylindrical portion arranged around a rotating shaft; a side plate portion arranged on one side in an axial direction of the inner cylindrical portion; an outer cylindrical portion arranged on an outer side in a radial direction of the side plate portion; and a recessed accommodating portion communicating an inner space on an inner side in the radial direction of the outer cylindrical portion and an outer space, a cover covering an opening portion on the other side in the axial direction of the recessed accommodating portion, a flexible substrate having a detection portion; and a signal line portion, a part of which is accommodated inside the recessed accommodating portion, and a connector attached to a tip-end portion of the signal line portion, the cover having a connector support portion for supporting the connector.