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Toroidal-type continuously variable transmission and continuously variable transmission apparatus

  • US 20040058772A1
  • Filed: 08/21/2003
  • Published: 03/25/2004
  • Est. Priority Date: 08/23/2002
  • Status: Active Grant
First Claim
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1. A toroidal-type continuously variable transmission, comprising:

  • a casing;

    a rotary shaft rotatably supported in the interior of the casing;

    a pair of outside disks each including an axial-direction one-side surface having an arc-shaped section, the outside disks being respectively supported on the two end portions of the rotary shaft so as to be rotatable in synchronization with the rotary shaft in a state that axial-direction one-side surfaces opposed to each other;

    an inside disk including axial-direction two side surfaces each having an arc-shaped section, the inside disk being supported so as to be rotatable with respect to the rotary shaft in a state that the axial-direction two side surfaces respectively opposed to the axial-direction one-side surfaces of the two outside disks;

    support members interposed by two or more between the axial-direction two side surfaces of the inside disk and the axial-direction one-side surfaces of the two outside disks with respect to the axial direction of the toroidal-type continuously variable transmission so as to be swung and shifted about associated pivot shafts disposed at positions twisted with respect to the rotary shaft;

    a plurality of support plates for supporting the pivot shafts disposed on the two end portions of the support members;

    a plurality of power rollers each including a peripheral surface formed as a spherically projecting surface and respectively rotatably supported on the associated support plates, the peripheral surfaces of the power rollers being contacted with the axial-direction two side surfaces of the inside disk and the axial-direction one-side surfaces of the respective outside disks;

    an actuator of an oil pressure type for shifting the support members in the axial direction of associated pivot shafts;

    an actuator body storing the main body portion of the actuator therein;

    a pair of support posts including support ring portions, the support ring portions respectively existing in middle portions between the axial-direction two side surfaces of the inside disk and the axial-direction one-side surfaces of the two outside disks, wherein the respective one-side end portions of the two support posts are connected and fixed to the actuator body in a state that the rotary shaft is inserted through the support ring portions of the two support posts, the axial-direction two end portions of the inside disk are rotatably supported on the support ring portions of the two support posts, and the support plates are supported on the neighboring portions of the respective two end portions of the two support posts.

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