Tortionally Stiff, Thermally Isolating Shaft Coupling with Multiple Degrees of Freedom to Accommodate Misalignment
First Claim
1. A drive arrangement for translating rotary movement from an actuator apparatus to a valve member, the drive arrangement comprising:
- an input shaft having a first end portion;
an output shaft having second end portion;
a first yoke including an axially extending first tang torsionally secured to the first end portion;
a second yoke including an axially extending second tang torsionally secured to the second end portion; and
a coupling shaft including a first slot formed in a first end slidably receiving the first tang torsionally coupling the coupling shaft to the first yoke, the coupling shaft including a second slot formed in a second end slidably receiving the second tang torsionally coupling the coupling shaft to the second yoke.
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Accused Products
Abstract
A coupling arrangement coupling and thermally isolating a continuously variable electrical actuator rotationally coupled to and from a butterfly valve is provided. The valve may be used to modulate high temperature exhaust gas flow through an engine turbocharger. The actuator provides a continuously variable control of the valve. The coupling arrangement provides a thermal block to reduce heat transfer and vibration insulation between the actuator and the valve. The coupling arrangement generally includes a coupling shaft rotationally coupled at opposite ends to the input and output shafts by torsion spring mechanisms. The torsion spring mechanisms include yokes rotationally locking the coupling shaft to the input and output shafts. The torsion spring mechanisms allow a limited range of axial and pivotal translation between the coupling shaft and the input and output shafts and are preloaded to prevent rotational hysteresis in the valve.
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Citations
19 Claims
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1. A drive arrangement for translating rotary movement from an actuator apparatus to a valve member, the drive arrangement comprising:
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an input shaft having a first end portion; an output shaft having second end portion; a first yoke including an axially extending first tang torsionally secured to the first end portion; a second yoke including an axially extending second tang torsionally secured to the second end portion; and a coupling shaft including a first slot formed in a first end slidably receiving the first tang torsionally coupling the coupling shaft to the first yoke, the coupling shaft including a second slot formed in a second end slidably receiving the second tang torsionally coupling the coupling shaft to the second yoke. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A coupling arrangement for coupling an actuator with a flow control valve and providing thermal barriers therebetween, the coupling arrangement comprising:
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a yoke including first and second axially extending tangs axially extending from a head portion and angularly coupled to one another by the head portion; a coupling shaft including first and second axially aligned and angularly spaced slots, the first slot slidably receiving the first tang and the second slot slidably receiving the second tang; and wherein the coupling shaft has a degree of rotational movement and a degree of axial movement relative to the yoke. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification