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Drive belt with a set of nested steel flexible rings

A transmission belt, flexible technology, applied in the field of transmission belt, can solve impossible and very expensive problems, and achieve the effect of reducing power loss

Active Publication Date: 2021-10-15
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the practice of mass manufacturing rings, ring sets and drive belts, it is practically impossible or at least very expensive to have zero radial clearance between each pair of adjacent rings of a drive belt ring set

Method used

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  • Drive belt with a set of nested steel flexible rings
  • Drive belt with a set of nested steel flexible rings
  • Drive belt with a set of nested steel flexible rings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] figure 1 The figure shows the central components of a known continuously variable transmission or CVT, which is commonly used in a motor vehicle transmission between its engine and driven wheels. The variator comprises two pulleys 1, 2 each provided with a pair of tapered pulley discs 4, 5 mounted on a pulley shaft 6 or 7, between which a mainly V-shaped Circumferential wheel groove. At least one pulley disk 4 of each pair of pulley disks 4 , 5 , ie of the pulley disks of each pulley 1 , 2 , is axially movable along the pulley shaft 6 , 7 of the corresponding pulley 1 , 2 . A drive belt 3 is wound around the pulleys 1 , 2 in pulley grooves for transmitting rotational motion and accompanying torque between the pulley shafts 6 , 7 .

[0021] The variator generally also comprises actuating means which, during operation, exert an axially directed clamping force on said axially displaceable pulley disc 4 of each pulley 1, 2, which force is directed towards the pulley 1, 2 ...

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PUM

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Abstract

The invention relates to a drive belt (3) comprising transverse elements (32) made of steel, each transverse element (32) having a recess accommodating part of a ring set (31) of the drive belt, the ring set (31) being directed by a radial direction A group of flexible steel rings (44) nested on each other are formed. According to the invention, the ring pairs arranged between the other ring pairs (44-i, 44-o), ie the ring pairs other than said radially innermost and outermost ring pairs (44-i, 44-o) Relatively large nesting gaps are provided in the radial direction in the ring set (31) of adjacent rings (44) except for the radially innermost ring pair (44‑i, 44‑o) compared to the positive radial gap and at least one ring pair other than the radially outermost ring pair (44‑i, 44‑o).

Description

technical field [0001] The present invention relates to a drive belt for use in the well-known pulley type continuously variable transmission or CVT commonly used in motor vehicles to convert the power generated by the motor vehicle's engine in a variable ratio / torque ratio Power is transmitted to its driven wheels. In this transmission, a drive belt is provided on two pulleys each including a pair of conical discs defining a conical circumferential groove in which respective circumferential portions of the drive belt lie while being sandwiched by the pulley discs. Background technique [0002] A well known type of drive belt is described in detail in EP 1 216 366 A1, this particular belt type is known in the prior art as a push drive belt. This known drive belt comprises a plurality of steel transverse segments, each having at least one, but usually two recesses, in each case a set of a plurality of mutually concentrically nested flexible steel rings of the circumferential...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H7/02F16H7/08
CPCF16H7/023F16H7/08F16G5/16
Inventor J·J·C·约恩克斯L·H·R·M·普林森
Owner ROBERT BOSCH GMBH
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