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Adjustable pulley for a continuously variable transmission, and method for the assembly thereof

An adjustable, pulley technology, applied in the direction of belts/chains/gears, winches, elements with teeth, etc.

Active Publication Date: 2015-04-15
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the case of a CVT, especially the pulley is a relatively complex and strictly dimensioned element and thus largely determines the cost price of the overall CVT

Method used

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  • Adjustable pulley for a continuously variable transmission, and method for the assembly thereof
  • Adjustable pulley for a continuously variable transmission, and method for the assembly thereof
  • Adjustable pulley for a continuously variable transmission, and method for the assembly thereof

Examples

Experimental program
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Embodiment Construction

[0017] According to figure 1 A prior art continuously variable transmission 1 , shown schematically in cross section in FIG. 2 , is arranged in its transmission housing 11 with a so-called primary adjustable pulley 3 and a so-called secondary adjustable pulley 7 . The pulleys 3, 7 each comprise two pulleys 4, 5; 8, 9 mounted on the main shaft 2 and the counter shaft 6, respectively. One pulley 5; 8 of each pulley 3; 7 is displaceable in the axial direction, so that the radial position of the drive belt 10 between the pulleys 3 and 7 can be changed, and the transmission ratio can be adjusted, and the corresponding Another fixed wheel 4; 9 is fixedly connected to the corresponding shaft 2; 6 both axially and tangentially.

[0018] Each displaceable pulley 5 and 8 is provided with an operating device in the form of a piston / cylinder assembly of the corresponding pulley 3, 4, wherein the displaceable pulley 8 of the secondary pulley 4 is provided with a single piston / cylinder ass...

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PUM

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Abstract

The invention relates to an adjustable pulley (7), in particular for a continuously variable transmission, comprising two sheaves (8, 9) having a central opening into which an axle (6) of the pulley (7) is inserted, a first or fixed sheave (9) of which is fixedly connected to the axle (6) and a second or displaceable sheave (8) is displaceable along the axle (6) in the axial direction by means of the operating means (26, 27, 58) of the pulley (7). The central opening of the fixed sheave (9) is, at least viewed in an axial cross section thereof, non-circular, the axle (6) is provided, at the location of the fixed sheave (9), with an axial cross section which is substantially identical in shape to the central opening thereof, and the fixed sheave (9) is provided on the axle (6) with a force fit.

Description

technical field [0001] The invention relates to an adjustable pulley, in particular for a continuously variable transmission or CVT, provided with two discs having a central opening into which the shaft of the pulley is inserted , the first sheave of which is fixedly connected to said pulley shaft, the second sheave of which is displaceable in the axial direction along said pulley shaft by the operating means of said pulley. Background technique [0002] A pulley of this type is known, for example, from US Patent No. 6,012,998, which is used in particular in CVTs, especially passenger cars. In a continuously variable transmission two pulleys are used, between them there is a drive belt which is in each case clamped in operation by movement between the two pulleys of the two pulleys, that is, Said second or displaceable sheave is pushed in axial direction at least towards said first or fixed sheave by operating means. The clamping force exerted on the drive belt by the resp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H55/56
CPCF16H55/56
Inventor J·G·L·M·范施皮吉克
Owner ROBERT BOSCH GMBH