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Drive mechanism for infinitely variable transmission

A technology for transmissions and transmissions, applied in transmissions, friction transmissions, transmission control, etc., can solve problems such as discouraging the use of transmissions

Active Publication Date: 2013-05-08
ALLISON TRANSMISSION INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] While the cost of this complexity is acceptable in motor vehicle transmissions, the use of transmissions in less demanding environments is discouraged

Method used

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  • Drive mechanism for infinitely variable transmission
  • Drive mechanism for infinitely variable transmission
  • Drive mechanism for infinitely variable transmission

Examples

Experimental program
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Embodiment Construction

[0033] The continuously variable ratio transmission system includes a variator V having a housing H enclosing an annular recessed input disc 10 and an opposed annular recessed output disc 12 . Two rollers 14, 16 are mounted in an annular cavity defined between opposing annular recessed faces of the input disc 10 and output disc 12 to transmit power from the input disc 10 to the output disc 12 with a gear ratio that The ratio is varied by tilting the rollers 14,16.

[0034] The input disc 10 is connected to and rotates with the system input shaft 18 . The variator V provides an output via a tubular output shaft 20 connected to the output disc 12 and coaxially arranged circumferentially with the input shaft 18 . The input shaft 18 and the transmission output shaft 20 provide input to the compound hybrid planetary gear train E1. As shown schematically, the end of the transmission output shaft 20 remote from the output disc 12 supports the first sun gear S1 of the hybrid planeta...

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PUM

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Abstract

A variator transmission comprises an input shaft (18), an input disc (10) mounted on the input shaft for rotation therewith and an output disc (12) facing the input disc and arranged to rotate coaxially therewith, the input and output discs defining between them a toroidal cavity. Two rollers (14, 16) are located in the toroidal cavity and first and second roller carriage means are provided upon which the first and second rollers respectively are rotatably mounted and end load means (34, 36) urge the rollers into contact with the input and output discs to transmit drive. The two roller carriage means are mounted on opposite sides of the pivotal axis of a lever (50) and the pivotal axis of the lever (50) is movable in both the radial and non-radial directions with respect to the rotational axis of the input and output discs.

Description

technical field [0001] The present invention relates to continuously variable transmissions of the annular race rolling traction type, hereinafter referred to as transmissions. Background technique [0002] A variator in its basic form comprises an annular recessed input disc connected to an input drive shaft and an annular recessed output disc arranged coaxially with respect to the input disc. A plurality of rollers, typically three rollers, are disposed in an annular cavity defined between the input and output discs, and power is transmitted from the input disc to the output disc through the rollers. The rolls are mounted (usually via double-acting hydraulic pistons) on roll brackets subjected to lateral forces. The same hydraulic pressure is usually applied to a so-called end load chamber to apply an axial force to one of the discs in order to ensure frictional engagement of the rollers with the input and output discs. [0003] Such transmissions are primarily designed ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H15/38
CPCF16H37/086F16H63/067F16H15/38F16H2037/088F16H61/6648F16H61/6649F16H15/32
Inventor C·J·格林伍德A·D·杰夫列塔斯R·A·奥利弗
Owner ALLISON TRANSMISSION INC
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