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Safety belt retractor having load limitation device

A seat belt retractor, load limiting technology, used in vehicle seat belts, belt tensioners, transport and packaging

Active Publication Date: 2011-10-26
AUTOLIV DEV AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the above-described embodiment has the disadvantage that, during the load-limited withdrawal movement, the spool part on which the belt is wound is radially deflected due to the tension generated by the belt, so that additionally in the load-limiting device with respect to torsional loads while producing a varying bending load

Method used

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  • Safety belt retractor having load limitation device
  • Safety belt retractor having load limitation device
  • Safety belt retractor having load limitation device

Examples

Experimental program
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Effect test

Embodiment Construction

[0023] figure 1 shows a seat belt retractor having a two-part spool comprising a first part 1 on which a seat belt 2 is wound and which can be locked in a manner fixed to a motor vehicle Stop the second part of 5. The two-part spool is located in a housing 8 formed by a U-shaped base and engages through openings 21 and 20 provided in opposite legs 8a and 8b of the housing 8, respectively. A torsion bar is arranged between the first part 1 and the second part 5 , which acts as a load limiting device 3 . A first end 3a of the torsion bar 3 is connected to the first part 1 of the spool and a second end 3b of the torsion bar is connected to the second part 5 of the spool. A locking pawl 4 is mounted on the second part 5, which can be controlled by motor vehicle induction and / or seat belt webbing induction. During the control process, the locking pawl makes the belt shaft and the The locking means fixed to the motor vehicle engages in a toothing 19 of the tensioner housing 9 whi...

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PUM

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Abstract

The invention relates to a safety belt retractor comprising a two-part belt shaft comprising a first part (1) of the belt shaft on which the safety belt (2) is wound and a second part (5) of the belt shaft that can be blocked opposite a housing (8) of the safety belt retractor attached to the vehicle frame; and the safety belt retractor also includes a load limitation device (3) arranged between the first (1) and the second (5) part of the belt shaft, wherein the first (1) and the second part (5) of the belt shaft overlap each other axially at least in sections and a bearing ring (13) is provided in the region of the overlap.

Description

technical field [0001] The invention relates to a seat belt retractor with a load limiting device having the features of the preamble of claim 1 . Background technique [0002] It is generally known that seat belt retractors have a load-limiting device, the purpose of which is to allow a limited forward movement of a passenger's load in the event of an accident. Accordingly, such a seat belt retractor comprises a two-part spool, and a load limiting device arranged between the two parts of the spool. The seat belt restraining the occupant is then fastened to one part of the belt shaft, while the other part of the belt shaft can be locked with respect to the housing of the seat belt retractor which is fixed to the motor vehicle. In the event of locking the belt and exceeding the force defined by the load limiting device, the part of the belt shaft which is fastened to the belt can be rotated in the belt withdrawal direction while triggering the load limiting device. Thereby,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60R22/34
CPCB60R22/3413B60R2022/287
Inventor 乔恩·伯罗冈特·克卢特
Owner AUTOLIV DEV AB
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