Sensor Mounting Member for Ball Screw Nuts Without Post-Processing
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Solution Overview
Problem
Conventional sensor mounting methods require laborious post-processing and risk of sensor detachment due to vibration, as they necessitate removing the ball screw from equipment for installation and tapping, which is impractical and unreliable.
Innovation Solution
A mounting member with a fixing portion that can be secured to fastening holes on a moving member of a motion guidance apparatus, allowing for easy and secure sensor attachment without dismounting the apparatus, using a fastening device that co-fastens with existing equipment, and a sensor mounting portion designed to maintain sensor sensitivity and prevent positional deviation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sensor is directly mounted to the axial end face of the nut or flange portion by tapping and fastening, then the sensor can be securely fixed, but the ball screw must be removed from equipment for post-processing which is laborious
Solution Approach 1:
The mounting member is pre-formed with threaded holes during manufacturing, eliminating the need for post-installation tapping. This preliminary preparation of fastening features allows the sensor to be mounted directly to the ball screw while it remains installed in the equipment, avoiding laborious removal and post-processing operations.
2Ease of operation
If the sensor is fixed by using a magnet or adhesive, then the mounting operation is simplified, but the sensor may come off due to vibration in long-term use
Solution Approach 1:
The patent replaces weak mechanical fixation methods (magnets or adhesives) with a robust threaded mechanical fastening system. The mounting member provides pre-formed threaded holes that accept fasteners, creating a rigid mechanical connection that can withstand vibration and ensure long-term reliability while maintaining ease of installation.
3Reliability
If the ball screw is removed from equipment for sensor mounting, then proper fastening can be achieved, but productivity is reduced due to laborious work
Solution Approach 1:
The mounting member is pre-manufactured with integrated threaded fastening holes, eliminating the need for on-site tapping operations that require ball screw removal. This preliminary preparation enables direct mounting to the installed ball screw, significantly improving productivity while maintaining mounting quality.
Solution Approach 2:
The mounting member acts as an intermediary component that bridges the sensor and the ball screw. It provides pre-formed threaded holes for secure fastening while being designed to attach to the ball screw's external diameter, enabling reliable sensor installation without removing the ball screw from the equipment.
Data Source
AI summary
Provided is a mounting member that allows a sensor such as a vibration sensor to be reliably and easily mounted to a moving member such as a nut of a motion guidance apparatus without need of removing the motion guidance apparatus from equipment, and without need of post-processing even when a motion guidance apparatus such as a ball screw is already mounted to the equipment, and a motion guidance apparatus including this mounting member. A mounting member for mounting a sensor to a motion guidance apparatus having a shaft member extending in a longitudinal direction and a moving member that is mounted so as to be movable along the longitudinal direction with respect to the shaft member, the mounting member including: a fixing portion that can be fixed to a fastening hole formed in the moving member; and a sensor mounting portion to which the sensor is mounted.