SEAT BELT RETRACTOR

• US 20200130641A1
• Filed: 11/20/2018
• Published: 04/30/2020
• Est. Priority Date: 10/25/2018
• Status: Abandoned Application

• Current Assignee: Autoliv AB (Autoliv Incorporated)
• Original Assignee: Autoliv AB (Autoliv Incorporated)
• Inventors: JABUSCH, RONALD
• Application Number:
  US16/196,127
• Publication Number:
  US 20200130641A1
• Time in Patent Office: Days
• CPC Class Codes: B60R 2022/4666 characterised by electric actuators
• CPC Class Codes: B60R 2022/468 characterised by clutching means between actuator and belt reel
• CPC Class Codes: B60R 22/3413 operating between belt reel and retractor frame B60R22/4676 takes precedence
• CPC Class Codes: B60R 22/46 Reels with means to tension the belt in an emergency by forced winding upelectrical circuits for triggering safety arrangements B60R21/01 ; tensioners using reels only guiding the belt during normal use, e.g. splitted reels B60R22/195
• CPC Class Codes: B60R 22/4628 characterised by fluid actuators, e.g. pyrotechnic gas generators actuating a cable B60R22/4619
• CPC Class Codes: B60R 22/4676 comprising energy-absorbing means operating between belt reel and retractor frame

Abstract

A seat belt retractor (40) having a belt spool (14), a seat belt (12) that can be wound thereon to a belt spool, and at least a first and a second assembly (1, 2), wherein the first and the second assembly (1, 2) are arranged coaxially to each other and at a first angle (A) to the rotational axis (B) of the belt spool (14) and are connected together by a flex coupling or an angular gear.

Claims

1. A seat belt retractor comprising;

a belt spool,

a seat belt that can be wound thereon to a belt spool,

at least a first and a second assembly each for controlling or influencing the winding or extraction of the seat belt on the belt spool, and

the first and the second assembly are arranged coaxially to each other and at a first angle to the rotational axis of the belt spool.

2. The seat belt retractor according to claim 1 further comprising, the first assembly is an electric motor and the second assembly is a gear that transmits a rotary driving movement of the electric motor to the belt spool.

3. The seat belt retractor according to claim 1 further comprising, a third assembly is provided for controlling or influencing the winding or extraction of the seat belt on the belt spool, which is arranged coaxially and in series to the belt spool or the first or the second assembly.

4. The seat belt retractor according to claim 3 further comprising, the third assembly is a force limiting device.

5. The seat belt retractor according to claim 3 further comprising, a fourth assembly is provided for controlling or influencing the winding or extraction of the seat belt on the belt spool, which is arranged coaxially and in series to the belt spool or the first or the second assembly.

6. The seat belt retractor according to claim 5 further comprising, the fourth assembly is an irreversible belt tightening mechanism.

7. The seat belt retractor according to claim 5 further comprising, the third and fourth assembly are arranged coaxially and in series to each other.

8. The seat belt retractor according to claim 1 further comprising, the belt spool is indirectly or directly connected to the first or the second assembly via an angular gear or a flex shaft.

9. The seat belt retractor according to claim 1 further comprising, a housing is provided with at least first and second housing parts, and the belt spool and at least one of the first or second assemblies are arranged in different ones of the first and second housing parts.

10. The seat belt retractor according to claim 9 further comprising, the first and second housing parts, in which the belt spool and the assemblies are arranged, are arranged to each other at an angle of their longitudinal axes, which corresponds to the first angle of the arrangement of the first and second assembly to the rotational axis of the belt spool.

11. The seat belt retractor according to claim 9 further comprising,

the belt spool and the first and second assemblies are arranged at a distance from each other and are mutually connected via a flex shaft, and

at least one housing center part is provided between the first and second housing parts, which mutually connects the first and second housing parts which are positioned at an angle with respect to each other.

12. The seat belt retractor according to claim 11 further comprising, other functional components allocated to the first or the second assemblies or the belt spool are arranged in the housing center part.

13. The seat belt retractor according to claim 9 further comprising, the first and second housing parts are formed by respective elongated U-profiles.

14. The seat belt retractor according to claim 13 further comprising, webs oriented vertically to the longitudinal axes of the U-profiles, which are rotationally connected to the U-profiles with reference to the longitudinal axes of the U-profiles, are provided in the U-profiles.

15. The seat belt retractor according to claim 14, further comprising, at least one of the first or second assemblies or the belt spool are supported in at least one of the webs.

16. The seat belt retractor according to claim 14 further comprising, further functional components of the assemblies or the belt spool are arranged in at least one of the webs.

17. The seatbelt retractor according to claim at 1 further comprising, the first assembly is an electric motor and the second assembly is one of an irreversible belt-tightening mechanism or a force limiting device, and the first and the second assemblies are connected via a flexible shaft.

18. The seatbelt retractor according to claim at 1 further comprising, the first assembly is an electric motor and the second assembly is an irreversible belt-tightening mechanism and a third assembly in the form of a force limiting device, a flexible shaft is positioned between the first and the second assemblies with the force limiting device coupled to the irreversible belt-tightening mechanism.

19. The seatbelt retractor according to claim at 1 further comprising, the first assembly is an electric motor and the second assembly is a gear reduction unit, the first and the second assemblies connected with a third and a fourth assembly by a flexible shaft position between the second and third assemblies.

20. The seatbelt retractor according to claim at 19 further comprising, the third assembly is an irreversible belt-tightening mechanism and the fourth assembly is a force limiting device.