Shaft Coupling Monitoring Apparatus
First Claim
1. A shaft coupling monitoring apparatus for monitoring a spider joint using outer peripheries of four shafts of a cross shaft as rolling contact surfaces for rolling motion of rolling elements,wherein each of the four shafts contain therein a sensor for detecting any damage on the rolling contact surface thereof, the sensor being located at a distal end of the shaft from the cross shaft, and the sensor being disposed in opposing relation with the rolling contact surface at said distal end.
1 Assignment
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Accused Products
Abstract
In a shaft coupling monitoring apparatus for monitoring a spider joint using outer peripheries of four shafts of a cross shaft as rolling contact surfaces, each of the shafts contains therein a sensor for detecting any damage on the rolling contact surface thereof. Even in a case where the spider joint is incorporated in a driving shaft such as of a rolling mill, the monitoring apparatus may provide high-accuracy and early detection of any damage such as flaking on the rolling contact surface defined on each of the shafts of the cross shaft.
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Citations
15 Claims
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1. A shaft coupling monitoring apparatus for monitoring a spider joint using outer peripheries of four shafts of a cross shaft as rolling contact surfaces for rolling motion of rolling elements,
wherein each of the four shafts contain therein a sensor for detecting any damage on the rolling contact surface thereof, the sensor being located at a distal end of the shaft from the cross shaft, and the sensor being disposed in opposing relation with the rolling contact surface at said distal end.
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11. A shaft coupling monitoring apparatus for monitoring a spider joint using outer peripheries of four shafts of a cross shaft as rolling contact surfaces for rolling motion of rolling elements,
wherein the shaft contains therein a sensor for detecting any damage on the rolling contact surface thereof, wherein a bearing cup is pivotally mounted on each of the four shafts, wherein a displacement sensor for detecting a relative displacement between the shaft and the bearing cup is used as said sensor and disposed at the bearing cup, and wherein the displacement sensor is disposed in a hole which is formed in the shaft in coaxial relation therewith, and detects the displacement by detecting a distance from an inside wall of the hole.
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13. A shaft coupling monitoring apparatus for monitoring a spider joint using outer peripheries of four shafts of a cross shaft as rolling contact surfaces for rolling motion of rolling elements,
wherein the shaft contains therein a sensor for detecting any damage on the rolling contact surface thereof, wherein an ultrasonic sensor capable of outputting an ultrasonic wave toward the rolling contact surface and receiving the ultrasonic wave reflected from the rolling contact surface is used as said sensor and disposed in the shaft, and wherein the ultrasonic sensor outputs an ultrasonic outgoing wave toward the rolling contact surface as keeping the outgoing wave in phase with an ultrasonic reflective wave reflected from the rolling contact surface free from damage in order to receive an amplified ultrasonic wave reflected from the rolling contact surface.
Specification