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Gear device, preferably motor device

  • US 9,140,341 B2
  • Filed: 04/17/2008
  • Issued: 09/22/2015
  • Est. Priority Date: 04/17/2008
  • Status: Active Grant
First Claim
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1. A gyroscopic devicefor generating rotation about an output axis, the gyroscopic device comprising:

  • a body mounted for rotation about first, second and third axes, the first axis being oriented with respect to the second axis at an inclination angle (θ

    ), the second axis constituting the output axis of the gyroscopic device, wherein rotation of the body about the third axis causes a change in the inclination angle (θ

    );

    the gyroscopic device being so structured as to enable a source of motive power to be connected to the body to cause it to rotate about the first axis at a rotational speed in excess of a predetermined value;

    a means for applying a torque to the body about the third axis in a direction to increase inclination angle (θ

    ) when the first axis is at a selected inclination angle (θ

    ) with respect to the second axis which is greater than 0 degrees and less than 90 degrees, thereby to generate a counter-torque about the third axis in a direction to decrease inclination angle (θ

    );

    a means for limiting rotation of the body about the third axis in a direction to decrease inclination angle (θ

    ) which would otherwise occur as a result of the counter-torque, such that the inclination angle (θ

    ) of the first axis with respect to the second axis remains greater than 0 degrees and less than 90 degrees;

    thereby to initiate, or to increase the speed of, rotation of the body about the second axis so as to generate motive power wherein the body has a specific critical angular velocity (ω

    c, spec) of less than 20000 rounds per minute, thereby to increase an output power about the output axis, andwherein said specific critical angular velocity (ω

    c, spec) is defined as follows;

    the specific critical angular velocity (ω

    c, spec) is the critical angular velocity (ω

    c) of the bodywhen the inclination angle (θ

    ) of the first axis with respect to the second axis is 45 degrees,when the first axis passes through substantially the center of mass (CM) of the body,when the body is oriented such that the moment of inertia of the body is substantially maximized,when, if the body is not symmetrical about a plane which passes through the center of mass (CM) of the body and which is orthogonal to the first axis, among two possible mounting orientations of mounting the body on the first axis the one with a smaller distance between the center of mass (CM) of the body and the third axis is used, andwhen a connection arm length (lc) is selected from the group consisting of;

    a) 5 mm if the mass of the body is less than 0.1 kg,b) 25 mm if the mass of the body is equal to or greater than 0.1 kg and less than 100 kg,c) 50 mm if the mass of the body is equal to or greater than 100 kg and less than 1000 kg, andd) 100 mm, otherwise,wherein the connection arm length (lc) is the distance of the intersection point of a connection plane (Pc) and the first axis to the third axis, and wherein among any planes which intersect the body and are orthogonal to the first axis, the plane having the minimum distance to the third axis is the connection plane (Pc).

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