The invention provides a safety belt retractor and a pre-tightening device thereof, the pre-tightening device comprises a pre-tightening wheel and a pre-tightening pipe, the pre-tightening pipe is provided with a first pipe end and an outlet end, the first pipe end is in fluid communication with a gas generator, the outlet end is aligned with the pre-tightening wheel, and a sealing ball and a pre-tightening ball are sequentially arranged between the first pipe end and the outlet end of the pre-tightening pipe; a safety valve is arranged on the pipe wall, between the gas generator and the sealing ball, of the pre-tightening pipe, and the safety valve is configured to allow gas from the gas generator to pass through the safety valve to release pressure outwards when the pressure of the gas is at or higher than preset pressure. The independent safety valve is additionally arranged on the pipe wall of the pre-tightening pipe, so that the air leakage pressure in the pre-tightening pipe is accurately controlled, and the potential safety hazard that the pre-tightening pipe bursts due to too high air pressure is prevented.

    本发明提供了一种安全带卷收器及其预紧装置,其中预紧装置包括预紧轮和预紧管,所述预紧管具有与气体发生器流体连通的第一管端和对准所述预紧轮的出口端,所述预紧管于其第一管端与出口端之间依次设有密封球和预紧球;所述预紧管于所述气体发生器与所述密封球之间的管壁上设置有安全阀,该安全阀被构造为允许来自所述气体发生器的气体在所述气体处于或高于预定压力时经过所述安全阀以向外泄压。本发明通过在预紧管的管壁加装一个独立的安全阀,从而精确控制预紧管内的泄气压力,防止预紧管因气压过高而导致爆裂的安全隐患。


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    Title :

    Safety belt retractor and pre-tightening device thereof


    Additional title:

    一种安全带卷收器及其预紧装置


    Contributors:
    PU ZHIHUA (author) / HU BO (author) / LEI YUYANG (author) / HAN ZHENGMAO (author)

    Publication date :

    2022-03-04


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR



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