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Tensioning drive for a safety belt device

A drive and seat belt technology, applied in the field of tensioning drives, can solve problems such as damage to sealing sliding components

Inactive Publication Date: 2014-12-24
JOYSON SAFETY SYST GERMANY GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In currently known tensioning drives, the sealing slide member is destroyed when the air pressure in the supply pipe in the part between the sealing pushing member and the gas generator becomes too high

Method used

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  • Tensioning drive for a safety belt device
  • Tensioning drive for a safety belt device
  • Tensioning drive for a safety belt device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] For the sake of clarity, the same reference numbers are always used for identical or comparable parts in the figures.

[0034] figure 1 An embodiment of a tensioning drive 10 is shown provided with a gas generator 20 , a drive wheel 30 and a supply pipe 40 connecting the gas generator 20 and the drive wheel 30 .

[0035] In the supply tube 40 there is a large number of spherical push members 50 driven by push members which seal the supply tube 40 and are in the form of push pistons 60 .

[0036] in accordance with figure 1 In the embodiment, the push piston 60 has a front sealing portion 61 and a rear sealing portion 62 . The rear sealing portion 62 abuts radially against the inner wall of the supply pipe 40 and seals the supply pipe 40 at the edge side.

[0037] as in figure 1As can be seen in , the rear sealing portion 62 is provided with a through hole 63 which enables the air flow G to pass through the through hole 63 and thus through the rear sealing portion 62...

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PUM

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Abstract

The invention relates to a tensioning drive (10) for a safely belt device and having: a gas generator (20), a drive wheel (30) and a supply pipe (40) which connects the gas generator (20) and the drive wheel (30), there being provided in the supply pipe (40) a plurality of pushing members (50) which are accelerated after the gas generator (20) has been activated and which drive the drive wheel (30), and at least one of the pushing members (60) completely or at least partially sealing the supply pipe (40). According to the invention, there is provision for the tensioning drive (10) to be constructed in such a manner that the sealing action of the at least one sealing pushing member (60) is ended or reduced after a predetermined distance has been travelled.

Description

technical field [0001] The invention relates to a tensioning drive for a safety belt arrangement having the features according to the preamble of patent claim 1 . Background technique [0002] Such a tensioning drive for a seat belt arrangement is described in US patent specification US 6,345,504. The currently known tensioning drives have a gas generator, a drive wheel and a supply line which connects the gas generator and the drive wheel to one another. A plurality of urging members are arranged in the supply pipe, which are accelerated after the gas generator has been activated and which drive the drive wheel, thereby tensioning the seat belt of the seat belt arrangement. The first pushing member in the supply pipe has a sealing effect when viewed from the gas generator, and the first pushing member alone completely seals the supply pipe. In currently known tensioning drives, the sealing slide member is destroyed when the gas pressure in the supply pipe in the portion b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60R22/46
CPCB60R22/4628B60R2022/4642
Inventor 沃尔夫冈·施拉德尔汉斯-于尔根·迪沃阿尔明·托特罗伯特·弗莱施曼格哈德·克林高夫海因里希·艾因西德尔赫伦·鲁迪格尔·鲍森
Owner JOYSON SAFETY SYST GERMANY GMBH