Belt retractor with adjustable force-limiting device

A self-locking belt retractor comprising:

• a belt reeling shaft having a belt connected thereto;
• a locking device, activatable in a vehicle sensitive or belt-sensitive manner for preventing belt removal from said belt reeling shaft;
• said locking device comprising a locking member and a profiled head connected to said belt reeling shaft, wherein said belt reeling shaft is locked when said locking member engages said profiled head;
• at least two force-limiting elements arranged in parallel or in series to one another, wherein one of said force-limiting elements is a torsion bar allowing a limited belt removal when said locking device locks said belt reeling shaft, and wherein a second one of said force-limiting elements is a torsion sleeve surrounding said torsion bar and connected to said profiled head;
• a switching device for selectively engaging at least one of said force-limiting elements to thereby connect said belt reeling shaft and said profiled head, wherein said switching device comprising at least one coupling element for selectively connecting said torsion bar, said torsion sleeve, or both said torsion bar and said torsion sleeve to said belt reeling shaft, wherein said coupling element is an axially movable follower disk connected in a positive-locking manner to an end of said belt reeling shaft opposite said profiled head, wherein said follower disk has follower pins, wherein said torsion bar has a first flange and said torsion sleeve has a second flange, wherein said follower disk has a coupling position in which said follower pins couple said torsion bar and said torsion sleeve to one another by penetrating said first and second flanges;
• said switching device being switched between said at least one of said force-limiting elements and said belt reeling shaft for adjusting the energy absorption of said belt retractor and adapting said belt retractor to pre-adjustable incidents of loading.

A self-locking belt retractor comprising:

• a belt reeling shaft having a belt connected thereto;
• a locking device, activatable in a vehicle sensitive or belt-sensitive manner for preventing belt removal from said belt reeling shaft;
• said locking device comprising a locking member and a profiled head connected to said belt reeling shaft, wherein said belt reeling shaft is locked when said locking member engages said profiled head;
• at least two force-limiting elements arranged in parallel or in series to one another, wherein one of said force-limiting elements is a torsion bar allowing a limited belt removal when said locking device locks said belt reeling shaft, wherein a second one of said force-limiting elements is comprised of at least one resistance body and a housing filled with a resistance material and arranged at an end of said belt reeling shaft opposite said locking member, wherein said at least one resistance body is revolvingly mounted within said housing, wherein said at least one resistance body acts as a switching device and is positioned-adjustable relative to said torsion bar;
• wherein said switching device for selectively engaging at least one of said force-limiting elements to thereby connect said belt reeling shaft and said profiled head;
• said switching device being switched between said at least one of said force-limiting elements and said belt reeling shaft for adjusting the energy absorption of said belt retractor and adapting said belt retractor to pre-adjustable incidents of loading.

A self-locking belt retractor comprising:

• a belt reeling shaft having a belt connected thereto;
• a locking device, activatable in a vehicle sensitive or belt-sensitive manner for preventing belt removal from said belt reeling shaft;
• said locking device comprising a locking member and a profiled head connected to said belt reeling shaft, wherein said belt reeling shaft is locked when said locking member engages said profiled head;
• at least two force-limiting elements arranged in parallel or in series to one another, wherein one of said force-limiting elements is a torsion bar allowing a limited belt removal when said locking device locks said belt reeling shaft, wherein a second one of said force-limiting elements is comprised of a paddle wheel and a housing filled with a resistance material and mounted at an end of said belt reeling shaft opposite said locking member, wherein said paddle wheel is rotatingly mounted in said housing, said second force-limiting element further comprising a pressure plate axially displaceably arranged in said housing for adjusting a density of said resistance material;
• a switching device for selectively engaging at least one of said force-limiting elements to thereby connect said belt reeling shaft and said profiled head;
• said switching device being switched between said at least one of said force-limiting elements and said belt reeling shaft for adjusting the energy of absorption of said belt retractor and adapting said belt retractor to pre-adjustable incidents of loading.

A self-locking belt retractor comprising:

• a belt reeling shaft having a belt connected thereto;
• a locking device, activatable in a vehicle sensitive or belt-sensitive manner for preventing belt removal from said belt reeling shaft;
• said locking device comprising a locking member and a profiled head connected to said belt reeling shaft, wherein said belt reeling shaft is locked when said locking member engages said profiled head;
• at least two force-limiting elements arranged in parallel or in series to one another, wherein one of said force-limiting elements is a torsion bar allowing a limited belt removal when said locking device locks said belt reeling shaft, wherein said torsion bar is comprised of different portions each having a different cross-section, whereby at least one of said portions is a second one of said force-limiting elements and wherein said portions are separated from one another by a connecting piece;
• a switching device for selectively engaging at least one of said force-limiting elements to thereby connect said belt reeling shaft and said profiled head, wherein said switching device comprises at least one coupling element and wherein said portions are respectively connectable to said belt reeling shaft by said at least one coupling element arranged between said belt reeling shaft and said connecting piece;
• said switching device being switched between said at least one of said force-limiting elements and said belt reeling shaft for adjusting the energy absorption of said belt retractor and adapting said belt retractor to pre-adjustable incidents of loading.

A self-locking belt retractor comprising:

• a belt reeling shaft having a belt connected thereto;
• a locking device, activatable in a vehicle sensitive or belt-sensitive manner for preventing belt reeling shaft;
• said locking device comprising a locking member and a profiled head connected to said belt reeling shaft, wherein said belt reeling shaft is locked when said locking member engages said profiled head;
• at least two force-limiting elements arranged in parallel or in series to one another, wherein one of said force-limiting elements is a torsion bar allowing a limited belt removal when said locking device locks said belt reeling shaft;
• a switching device for selectively engaging at least one of said force-limiting elements to thereby connect said belt reeling shaft and said profiled head;
• said switching device being switched between said at least one of said force-limiting limiting elements and said belt reeling shaft for adjusting the energy absorption of said belt retractor and adapting said belt retractor to pre-adjustable incidents of loading;
• and
• a pressure ring rotatably supported in a housing of said belt retractor for switching off said torsion bar by engaging said belt reeling shaft, wherein said pressure ring is secured in a full load position by a pawl activated by a pyrotechnical ignition pill.