Dynamic Balancer Horizontal Force Detection
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Solution Overview
Problem
Existing tire balancing machines are not accurate in detecting forces in a horizontal plane during tire rotation, which limits their ability to precisely determine the balance condition and location of imbalances in tires.
Innovation Solution
A dynamic balancer with a support frame, spindle assembly, and multiple force sensors positioned in a horizontal plane to detect force variations as the tire rotates, generating data for calculating imbalance conditions and marking imbalances exceeding a predetermined threshold.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If load cells are used to detect forces in an axial relation to the tire's rotation, then the tire balance can be measured, but the measurement precision of force detection in the horizontal plane is insufficient
Solution Approach 1:
The patent transitions from axial force detection to horizontal plane force detection by repositioning the force sensors. The force sensors are arranged in a horizontal plane rather than axially, enabling detection of forces in the radial direction during tire rotation. This dimensional change allows for more accurate identification of imbalance locations and amounts.
Solution Approach 2:
The patent divides the force detection function into multiple discrete force sensors positioned at different locations in the horizontal plane. Rather than using a single axial load cell, multiple force sensors are distributed around the tire's rotation path, each detecting forces at its specific position. This segmentation enables precise localization of imbalance sources.
2Loss of information
If forces are detected only in an axial relation, then the detection system is simple, but the ability to identify location and amount of imbalance is insufficient
Solution Approach 1:
The patent adds a horizontal plane dimension to force detection, moving from one-dimensional axial detection to two-dimensional horizontal detection. This enables the system to capture force variations at different angular positions around the tire, providing complete information about imbalance location and magnitude.
Solution Approach 2:
The force sensors provide continuous feedback on force variations during tire rotation. The system processes these force signals to determine both the location and amount of imbalance, creating a feedback loop that enables precise diagnosis and correction of tire balance issues.
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 approach provides a more accurate and reliable assessment of tire balance by detecting forces in a horizontal plane, enabling precise identification of imbalance locations and weights, thereby improving the accuracy of tire balancing tests.
Implementation Method 1
at least one force sensor coupled between the sensor plate and the spindle assembly to detect force variations therebetween as the rotatable spindle shaft rotates
Data Source
AI summary
A dynamic balancer includes a support frame with a frame plate that has a spindle opening through which a spindle assembly with a rotatable spindle shaft is received. A sensor plate is coupled to at least the support frame, and at least one force sensor is coupled between the sensor plate and the spindle assembly to detect force variations therebetween as the rotatable spindle shaft rotates. A related method for detecting a balance condition of a tire includes providing a plurality of force sensors maintained in a substantially horizontal plane with respect to the tire's rotation, chucking and inflating the tire, spinning the tire to a predetermined speed, generating force data from the plurality of force sensors, calculating an imbalance condition from the force data, and marking the tire at a location of imbalance if the imbalance condition exceeds a predetermined threshold.