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In-series two chain continuously variable transmission

  • US 20060154760A1
  • Filed: 01/11/2005
  • Published: 07/13/2006
  • Est. Priority Date: 01/11/2005
  • Status: Active Grant
First Claim
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1. A continuously variable transmission comprising:

  • a housing that defines a belt chamber, an input pulley assembly and an output pulley assembly positioned within said belt chamber, a first transfer pulley assembly and a second transfer pulley assembly mounted to a countershaft, a first chain extending between said input pulley assembly and said first transfer pulley assembly, a second chain extending between said second transfer pulley assembly and said output pulley assembly, said input pulley assembly comprising a first end and a second end, said first end being supported by said housing and said second end being supported by a bearing holder;

    said output pulley assembly comprising a first end and a second end, said first end being support by said housing and said second end being supported by said bearing holder;

    said countershaft comprising a first end and a second end, said first end being supported by said housing and said second end being supported by said housing;

    said input pulley assembly comprising a shaft portion and a fixed disk portion, said shaft portion and said disk portion being integrally formed, said input pulley assembly also comprising a bulkhead that is axially fixed along said shaft portion and a moveable disk that is positioned between said bulkhead and said fixed disk portion, said bulkhead being secured to said shaft portion for rotation with said shaft portion and said moveable disk portion being coupled to said bulkhead for rotation while remaining axially movable along said shaft portion relative to said bulkhead;

    said output pulley assembly comprising a shaft portion and a fixed disk portion, said shaft portion and said disk portion being integrally formed, said output pulley assembly also comprising a bulkhead that is axially fixed along said shaft portion and a moveable disk that is positioned between said bulkhead and said fixed disk portion, said bulkhead being secured to said shaft portion for rotation with said shaft portion and said moveable disk portion being coupled to said bulkhead for rotation while remaining axially movable along said shaft portion relative to said bulkhead;

    said first transfer pulley assembly comprising a fixed disk portion and a moveable disk portion, said fixed disk portion being axially and rotationally secured to said countershaft;

    said second transfer pulley assembly comprising a fixed disk portion and a moveable disk portion, said fixed disk portion being axially and rotationally secured to said countershaft;

    said moveable disk portion of said first transfer pulley assembly and said moveable disk portion of said second transfer pulley assembly being defined in a single shuttle disk member, said shuttle disk member being positioned along said countershaft between said fixed disk portion of said first transfer pulley assembly and said fixed disk portion of said second transfer pulley assembly, said shuttle disk member being adapted for axial translation along said countershaft, said shuttle disk member comprising a first bearing portion and a second bearing portion that are separated by a recessed portion, and said first and second bearing portion abutting said countershaft.

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