公开(公告)号：US11370390B2

公开(公告)日：2022-06-28

申请号：US16765571

申请日：2018-11-15

Applicant: Autoliv Development AB

Inventor： Christian Fischer ,  Martin Schmidt

IPC: B60R22/46

Abstract: The invention relates to a belt tightener (1) with a mass body drive for a seat belt of a motor vehicle with a force-limiting device with—a belt shaft (3) mounted rotatably in at least one opening (15) of a housing (14) that can be fastened fixedly to the vehicle, it being possible to wind up the seat belt on said shaft, —a tightener drive wheel (24) connected non-rotatably to the belt shaft (3) and having recesses (14) distributed at regular intervals over the circumference, —a chain forming the mass body drive made of loose mass bodies (19), which are guided in a tightener tube (10) and can be driven by pressure application of the tightener tube (10), wherein—the belt shaft (3) can be driven in the winding direction of the seat belt by engagement of the driven mass bodies (19) in the recesses (14) of the tightener drive wheel (24), wherein—the mounting of the belt shaft (3) in the opening (15) of the housing (14) is designed to be flexible in the radial direction.

公开(公告)号：US09114780B2

公开(公告)日：2015-08-25

申请号：US13669726

申请日：2012-11-06

Applicant: Autoliv Development AB

Inventor： Christian Fischer ,  Martin Schmidt ,  Matthias Steinberg ,  Michael Pech ,  Tobias Voss ,  Thomas Schmidt ,  Simone Mesecke-Rischmann

IPC: B65H75/48 ,  B60R22/46

CPC classification number: B60R22/4628 ,  B60R2022/4642

Abstract: A piston for a pretensioner device (10) for a motor vehicle seat belt system of a type having a gas generator (17) with the piston (21) guided in a tube (16) that closes a pressure space (20) in the tube (16). The pressure space (20) can be pressurized by the gas generator (17), driving the piston (21) to undergo pretensioning operation transmitted to the seat belt system by a force transmission means. The piston has a dome shaped front side adapted to engage a force transmission element and a skirt forming a sealing lip oriented toward the pressure space. At least one slot is formed in the outer surface of the piston extending axially from the sealing lip. The slot can be enlarged by the material erosion caused by the pressure and/or pressure conditions in the pressure space produced by gas from the gas generator.

Abstract translation: 一种用于机动车辆安全带系统的预紧器装置（10）的活塞，其具有带有活塞（21）的气体发生器（17）的类型，所述气体发生器（17）被引导在管（16）中，所述管（16）封闭所述管中的压力空间（20） （16）。 压力空间（20）可由气体发生器（17）加压，驱动活塞（21）进行通过力传递装置传递到安全带系统的预张紧作业。 活塞具有适于接合力传递元件和形成朝向压力空间的密封唇的裙部的圆顶形前侧。 在从密封唇轴向延伸的活塞的外表面中形成至少一个槽。 通过由来自气体发生器的气体产生的压力空间中的压力和/或压力条件引起的材料侵蚀可以扩大槽。

公开(公告)号：US11970132B2

公开(公告)日：2024-04-30

申请号：US17273489

申请日：2019-08-26

Applicant: Autoliv Development AB

Inventor： Christian Fischer

IPC: B60R22/46

CPC classification number: B60R22/4628 ,  B60R2022/4642

Abstract: A pyrotechnic tightening device 1 of a safety belt unit having a force limiting unit, comprising—a gas generator, and—a piston 19, which is guided in a pipe and which closes a pressure chamber inside the pipe, wherein—a pressure can be applied to the pressure chamber by the gas generator, and—the piston can be driven by the pressure present in the pressure chamber to perform a tightening movement which can be transmitted by means of a force transmitting unit to the safety belt, wherein—the piston is formed in two parts consisting of a main body and a contact part arranged on the side of the main body facing the force transmitting unit, wherein—the contact part has a greater strength than the main body, wherein—the main body surrounds the contact part form fittingly at the end face facing the force transmitting device.

公开(公告)号：US20130062450A1

公开(公告)日：2013-03-14

申请号：US13669726

申请日：2012-11-06

Applicant: Autoliv Development AB

Inventor： Christian Fischer ,  Martin Schmidt ,  Matthias Steinberg ,  Michael Pech ,  Tobias Voss ,  Thomas Schmidt ,  Simone Mesecke-Rischmann

IPC: B60R22/46

CPC classification number: B60R22/4628 ,  B60R2022/4642

Abstract: A piston for a pretensioner device (10) for a motor vehicle seat belt system of a type having a gas generator (17) with the piston (21) guided in a tube (16) that closes a pressure space (20) in the tube (16). The pressure space (20) can be pressurized by the gas generator (17), driving the piston (21) to undergo pretensioning operation transmitted to the seat belt system by a force transmission means. The piston has a dome shaped front side adapted to engage a force transmission element and a skirt forming a sealing lip oriented toward the pressure space. At least one slot is formed in the outer surface of the piston extending axially from the sealing lip. The slot can be enlarged by the material erosion caused by the pressure and/or pressure conditions in the pressure space produced by gas from the gas generator.

Abstract translation: 一种用于机动车辆安全带系统的预紧器装置（10）的活塞，其具有带有活塞（21）的气体发生器（17）的类型，所述气体发生器（17）被引导在管（16）中，所述管（16）封闭所述管中的压力空间（20） （16）。 压力空间（20）可由气体发生器（17）加压，驱动活塞（21）进行通过力传递装置传递到安全带系统的预张紧作业。 活塞具有适于接合力传递元件和形成朝向压力空间的密封唇的裙部的圆顶形前侧。 在从密封唇轴向延伸的活塞的外表面中形成至少一个槽。 通过由来自气体发生器的气体产生的压力空间中的压力和/或压力条件引起的材料侵蚀可以扩大槽。