CVT

A technology for transmissions and transmission housings, applied to components with teeth, belts/chains/gears, mechanical equipment, etc., which can solve problems such as short life, high friction of CVT-transmissions, etc.

Active Publication Date: 2016-08-17
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This leads to high friction and short life of this type of CVT-transmission

Method used

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Examples

Experimental program
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Embodiment Construction

[0025] figure 1 The CVT transmission 10 shown in has a fluid-tight transmission housing 12, which in the illustrated embodiment consists of a first housing shell 14 and a second housing shell 16, which are screwed together . The first housing shell 14 and / or the second housing shell 16 can be produced from a plastic material. Inside the transmission housing 12 , a first variator 18 is arranged on the input side and a second variator 20 is arranged on the output side, which are coupled to one another via a flat-link chain 22 . The second variator 20 can be configured similarly to the first variator 18 , wherein the first variator 18 can be arranged in a mirror image relative to the second variator. The first variator 18 has an input shaft 24 which is connected to a first pair of cones 26 . The first conical disk pair 26 has a first counter disk 28 arranged immovably in the axial direction with respect to the input shaft 24, towards which a first adjusting disk 32 can be move...

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PUM

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Abstract

The invention relates to a CVT transmission for an essentially continuously variable transmission of a torque, comprising a first conical disk pair on the input side having a first adjusting disk moving in the axial direction relative to a first counter disk, a second conical disk pair on the output side having a second adjusting disk moving in the axial direction relative to a second counter disk, and further comprising a belt means which is received by the first and the second conical disk pair for transmitting the torque from the first conical disk pair to the second conical disk pair, an essentially electrically driven first adjustment device for pressing the belt means between the first counter disk and the first adjusting disk and an essentially electrically driven second adjustment device for pressing the belt means between the second counter disk and the second adjusting disk. According to the invention, the second adjustment device can be actuated independently from the first adjustment device for varying the pretension of the belt means. As a result, the CVT transmission is characterized by little wear over a high torque range.

Description

technical field [0001] The invention relates to a continuously variable transmission (CVT) by means of which the torque transmission of a drive engine of a motor vehicle, for example, can be continuously adjusted. Background technique [0002] For example, JP 2005036855 A discloses a CVT transmission designed as a winding transmission for the small power range. The CVT transmission has two cone pairs coupled to each other by plastic belts, wherein one cone pair can be moved axially relative to a stationary cone, whereby the belts can act with different radii on the The corresponding cones are aligned to change the transmission ratio. In order to move the cone pair axially, exactly one adjusting device is used, which moves a cone on the input-side cone pair and is connected to the axially displaceable cone of the output-side cone pair by means of gears. coupling. [0003] CVT-transmissions of this type are preferably used in relatively small power and torque ranges, since ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H61/662F16H63/06F16H9/18
CPCF16H63/062F16H9/18F16H61/66259F16H61/66272
Inventor B·瓦尔特
Owner SCHAEFFLER TECH AG & CO KG
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