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A load limiting retractor

A retractor, reel technology, applied in the field of vehicles, can solve problems such as limitations

Active Publication Date: 2021-07-27
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus the threshold force of the torsion bar limits the force transmitted to the passenger through the seat belt

Method used

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  • A load limiting retractor
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Examples

Experimental program
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Embodiment Construction

[0035] Referring to the drawings, wherein like reference numerals refer to like parts throughout the several views, the retractor 30 of the restraint system 52 includes a spool 32, a torsion bar 34, a torsion cylinder 36 rotationally fixed to the spool 32, and the torsion bar. 34 aligned locking member 38 . The torsion bar 34 and torsion barrel 36 extend coaxially from the spool 32 to respective first ends 40 , 42 , and the torsion bar 34 has a key 44 . The locking member 38 can be obtained from such as Figure 4A The unlocked position shown is disengaged from the rotation of the torsion bar 34 to move as Figure 4B The locked position is shown in which the key 44 rotationally secures the locking member 38 to the first end 40 of the torsion bar 34 .

[0036] When the retractor 30 is in the locked position, as explained further below, the retractor 30 has a lower load limiting phase and a higher load limiting phase in which the torsion bar 34 relative to the spool 32 and tor...

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PUM

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Abstract

A retractor includes a spool, a torsion bar and a torsion barrel rotationally secured to the spool, and a locking member aligned with the torsion bar. The torsion bar and the torsion barrel extend coaxially from the spool to respective first ends, and the torsion bar has a key. The locking member is movable from an unlocked position rotationally disengaged from the torsion bar to a locked position in which a key rotationally secures the locking member to the first end of the torsion bar. When the locking member is in the unlocked position, the torsion bar is plastically deformable to limit the load applied by the webbing to the passenger. If sufficient force is applied to the webbing, the locking member moves to a locked position in which both the torsion bar and torsion barrel lock together and limit the load applied by the webbing in series.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to a load limiting retractor. Background technique [0002] Seat belts in vehicles can be equipped with "load limiting" features. During a crash, the retractor of the seat belt can lock the webbing of the seat belt to prevent the webbing from protruding further from the retractor, but when the force acting on the webbing exceeds the load limiting threshold, the load limiting part Allow some additional webbing extension with restrictions. The extra extension of the webbing from the retractor limits the load the webbing exerts on the occupant's chest to reduce chest deformation. [0003] Load limitation can be achieved through the use of torsion bars. One end of the torsion bar can be attached to the spool on which the webbing is coiled in the retractor. In the event of a crash, the other end of the torsion bar may be fixed. When the passenger applies a force tending to withdraw...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60R22/42
CPCB60R22/42B60R22/3413B60R22/38B60R22/4676
Inventor 迪恩·M·贾拉迪萨伊德·大卫·巴尔巴特穆罕默德·奥玛·法鲁克伊斯坎德·法鲁克
Owner FORD GLOBAL TECH LLC
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