In-series two chain continuously variable transmission
First Claim
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1. A continuously variable transmission comprising:
- a housing that defines a belt chamber, said housing comprising a first portion and a second portion, said first portion and said second portion being substantially identical;
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 bearing holder being captured between said first portion and said second portion of said housing, said bearing holder comprising a fluid port, said fluid port being fluidly connected to a fluid passage that extends through at least a portion of said 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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Abstract
A continuously variable transmission has an input pulley assembly connected to a first transfer pulley assembly with a first chain and a second transfer pulley assembly connected to an output pulley assembly with a second chain. The first transfer pulley assembly and the second transfer pulley assembly shaft a common shuttle disk that moves axially on a countershaft that carries the first and second transfer pulleys. The input pulley assembly and the output pulley assembly are generally axially aligned and a bearing carrier is positioned between the pulleys. A high pressure fluid supply system reduces or eliminates axial loading on the shafts of the transmission.
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Citations
13 Claims
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1. A continuously variable transmission comprising:
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a housing that defines a belt chamber, said housing comprising a first portion and a second portion, said first portion and said second portion being substantially identical; 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 bearing holder being captured between said first portion and said second portion of said housing, said bearing holder comprising a fluid port, said fluid port being fluidly connected to a fluid passage that extends through at least a portion of said 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A continuously variable transmission comprising:
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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 bearing holder comprising a fluid port, said fluid port being fluidly connected to a fluid passage that extends through at least a portion of said 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 shuffle 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 shuffle 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. - View Dependent Claims (10, 11, 12, 13)
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Specification