The invention relates to a safety belt retractor (1), comprising: a belt shaft (4) which is rotatably mounted in a housing and on which a safety belt can be wound, the housing being capable of being fastened to a vehicle; and an electric motor (5) for driving the belt shaft (4) in rotational movement; and a gear mechanism (6) which transmits a rotational movement from the electric motor (5) to the belt shaft (4), the gear mechanism (6) being drivable as an assembly in a first force transmission path in order to drive the belt shaft (4) with a first torque, the gear mechanism (6) can be driven to drive the belt shaft (4) with a second torque by switching a speed-controlled and/or torque-controlled coupling (8), thereby opening a second force transmission path, the coupling (8) having at least one coupling element (15) which is spring-loaded by a spring (12) to engage in a first part (13) of the gear mechanism (6), wherein a drive wheel (17), which is connected in a rotationally fixed manner to the electric motor (5), is provided with a polygonal force transmission profile (19), and the coupling element (15) has at least one force transmission section (20, 21) which abuts the polygonal force transmission profile (19) and by means of which the force transmission section (20, 21) transmits force to the drive wheel (17). As a result of a relative movement of the drive wheel (17) with respect to the coupling element (15) exceeding a predetermined rotational speed and/or a predetermined torque and/or a predetermined rotational acceleration transmitted by the drive wheel (17), the coupling element (15) can be moved out of engagement in the first part (13) of the gear mechanism (6) against the force of the spring (12).

    本发明涉及一种安全带卷收器(1),包括:带轴(4),该带轴可旋转地安装在壳体中并且安全带能够卷绕在带轴上,壳体能够被紧固到车辆上;和电动马达(5),该电动马达用于驱动带轴(4)旋转地运动;和齿轮机构(6),该齿轮机构将旋转运动从电动马达(5)传递到带轴(4),其中齿轮机构(6)能够作为组件在第一力传递路径中被驱动以便以第一扭矩驱动带轴(4),并且齿轮机构(6)能够被驱动以通过切换速度受控和/或扭矩受控的联轴器(8)来以第二扭矩驱动带轴(4),由此打开第二力传递路径,其中联轴器(8)具有至少一个联轴元件(15),该至少一个联轴元件由弹簧(12)弹簧加载成接合在齿轮机构(6)的第一零件(13)中,其中以旋转固定的方式连接到电动马达(5)的驱动轮(17)设置有多边形力传递轮廓(19),并且联轴元件(15)具有至少一个力传递部分(20,21),该力传递部分抵接多边形力传递轮廓(19)并且通过力传递部分,由于当超过由驱动轮(17)传递的预定旋转速度和/或预定扭矩和/或预定旋转加速度时驱动轮(17)相对于联轴元件(15)的相对运动,联轴元件(15)能够抵抗弹簧(12)的力而运动脱离在齿轮机构(6)的第一零件(13)中的接合。


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    Title :

    Safety belt retractor


    Additional title:

    安全带卷收器


    Contributors:

    Publication date :

    2023-05-16


    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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