WO2024022967A1 - Gurtaufroller - Google Patents
Gurtaufroller Download PDFInfo
- Publication number
- WO2024022967A1 WO2024022967A1 PCT/EP2023/070264 EP2023070264W WO2024022967A1 WO 2024022967 A1 WO2024022967 A1 WO 2024022967A1 EP 2023070264 W EP2023070264 W EP 2023070264W WO 2024022967 A1 WO2024022967 A1 WO 2024022967A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- bearing
- belt
- bearing surface
- retractor
- reel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R22/00—Safety belts or body harnesses in vehicles
- B60R22/34—Belt retractors, e.g. reels
Definitions
- the invention relates to a belt retractor for a vehicle seat belt, with a housing, a rotatable retractor axle for a belt reel located in the housing and bearings arranged at both ends of the retractor axle.
- the belt force leads, at least at times, to high radial forces on the retractor axis. These high forces promote wear on the bearings, especially in the radial direction.
- a belt retractor for a vehicle seat belt with a housing, a rotatable retractor axle for a belt reel located in the housing and bearings arranged at the two axial ends of the retractor axle, at least one of the bearings having a first cylindrical bearing surface and an axially has a second cylindrical bearing surface offset from the first bearing surface, the bearing being designed in such a way that the retractor axis is supported on the second bearing surface when the belt reel is loaded radially and the retractor axis is only supported on the first bearing surface when the belt reel is in a radially unloaded state.
- the belt retractor according to the invention has the advantage that in the event of a radial load, a high proportion of the radial forces are absorbed on the second bearing surface, whereby the first bearing surface is relieved. This means that a large part of the wear that occurs is on the second, which is subject to higher loads Bearing surface takes place, while only very little wear occurs on the first bearing surface.
- the radial position of the reel axle is therefore not or only slightly influenced by wear, since the first bearing surface ensures that the reel axle is supported in a defined position.
- the bearing is, for example, a radial bearing and the first and second bearing surfaces have different diameters, with the second bearing surface being arranged coaxially to the first bearing surface.
- the bearing surfaces are therefore formed by a gradation, which means they can be demolded into a single component. In this way, assembling the belt retractor is simplified.
- the first bearing surface and the second bearing surface are formed, for example, in a bearing shell.
- the bearing shell can be easily attached to the side of the retractor axle when assembling the belt retractor.
- the first and/or the second bearing surface can have axially extending ribs.
- the ribs reduce the contact area, which also reduces the friction of the reel axle on the bearing surfaces.
- the reel axle can run along at least one bearing journal which is mounted in the bearing. This contributes to a mechanically simple and compact design of the belt retractor.
- the bearing pin is formed on a locking disk.
- This also contributes to a compact design of the belt retractor. Furthermore, this ensures that the position of the locking disk toothing formed on the locking disk is not or only slightly influenced by wear on the bearing surfaces. In particular, the position of the locking disk is maintained in the load range below the defined limit value.
- Figure 1 shows a longitudinal section through a belt retractor according to the invention in the area of an axial end of the retractor axis
- Figure 2 shows a bearing for supporting the reel axle.
- Figure 1 shows a cross section through a belt retractor 10 for a vehicle seat belt with a housing 12 in which a rotatable retractor axis 14 for a belt reel 16 sits.
- the webbing is wound on the belt reel 16.
- Bearings 18 are arranged at the two axial ends of the reel axle 14, with only one of the bearings 18 being shown in FIG.
- the second bearing can be designed in the same way.
- the bearing 18 is designed as a radial bearing.
- the bearing 18 is formed in a bearing shell 20, i.e. in one piece with the bearing shell 20.
- the bearing shell simultaneously forms a side housing cover which is attached to the housing 12.
- the bearing shell 20 can be made of plastic.
- the reel axle 14 runs along a bearing pin 22 which is mounted in the bearing 18. Specifically, the free end of the reel axle 14 is accommodated in the bearing 18.
- a pawl (not shown) blocks the rotation of the belt reel 16 in the belt withdrawal direction in a vehicle-sensitive and/or belt-sensitive manner.
- the bearing pin 22 is formed on a locking disk 24.
- a locking disk toothing 26 is formed on the bearing pin 22, into which a child safety gear 28 engages.
- Figure 2 shows the bearing 18 in a perspective view. As can be seen in Figure 2, the bearing 18 is bush-shaped.
- the bearing 18 bearing has a first cylindrical bearing surface 30 and a second cylindrical bearing surface 32 which is axially offset from the first bearing surface.
- bearing surfaces 30, 32 adjoin one another in the axial direction.
- the first bearing surface 30 and the second bearing surface 32 have different diameters, with the second bearing surface 32 being arranged coaxially with the first bearing surface 30. This creates a shoulder 34 between the first bearing surface 30 and the second bearing surface 32. The shoulder can contribute to the axial support of the reel axle 14.
- both the first bearing surface 30 and the second bearing surface 32 have axially extending ribs 36.
- the ribs 36 reduce the contact area with the bearing pin 22.
- the retractor axle 14 is supported only on the first bearing surface 30, in particular by means of the bearing pin 22, in the radially unloaded state of the belt reel 16.
- the bearing pin 22 lies against the second bearing surface 32, whereby the first bearing surface 30 is significantly relieved. According to the invention, this reduces wear on the first bearing surface 30.
- the reduced wear ensures particularly precise positioning of the retractor axle 14 throughout the entire service life of the belt retractor 10. As a result, in particular, an overlap between the locking disk teeth 26 and the child safety gear 28 is maintained.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202380055232.4A CN119585155A (zh) | 2022-07-26 | 2023-07-21 | 安全带卷收器 |
| US18/997,639 US12606122B2 (en) | 2022-07-26 | 2023-07-21 | Belt retractor |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022118709.8 | 2022-07-26 | ||
| DE102022118709.8A DE102022118709A1 (de) | 2022-07-26 | 2022-07-26 | Gurtaufroller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024022967A1 true WO2024022967A1 (de) | 2024-02-01 |
Family
ID=87468609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2023/070264 Ceased WO2024022967A1 (de) | 2022-07-26 | 2023-07-21 | Gurtaufroller |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US12606122B2 (de) |
| CN (1) | CN119585155A (de) |
| DE (1) | DE102022118709A1 (de) |
| WO (1) | WO2024022967A1 (de) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202004002806U1 (de) * | 2004-02-23 | 2004-07-15 | Trw Automotive Gmbh | Gurtaufroller |
| DE102016001917A1 (de) * | 2016-02-18 | 2017-08-24 | Trw Automotive Gmbh | Gurtaufroller |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2720959A1 (de) | 1977-05-10 | 1978-11-16 | Autoflug Gmbh | Gurtaufroller fuer sicherheitsgurte |
| AU506157B1 (en) * | 1977-08-17 | 1979-12-13 | Fuji Kiko Co. Ltd. | Seatbelt retractor |
| CA1203221A (en) * | 1983-02-18 | 1986-04-15 | Horst U. Befort | Journalling structure for seat belt retractors |
| JPS604447A (ja) * | 1983-06-21 | 1985-01-10 | Ashimori Ind Co Ltd | シ−トベルトのリトラクタ− |
| US5671894A (en) * | 1995-08-11 | 1997-09-30 | Alliedsignal Inc. | Retractor with load limiting spool with decoupled pretensioner |
| DE102005013268A1 (de) | 2005-03-22 | 2006-10-05 | Trw Automotive Gmbh | Lagerstift für eine Gurtspule und Baugruppe mit einem solchen Lagerstift |
| CN101557964B (zh) * | 2006-10-14 | 2011-05-25 | 奥托立夫开发公司 | 在不同的作用位置上具有不同载荷传递的安全带卷收器 |
| DE102016206448B4 (de) | 2016-04-16 | 2019-08-08 | Joyson Safety Systems Germany Gmbh | Gurtaufroller für eine Sicherheitsgurteinrichtung |
| US10723310B2 (en) * | 2018-01-26 | 2020-07-28 | Autoliv Asp, Inc. | Seatbelt pretensioning retractor assembly |
-
2022
- 2022-07-26 DE DE102022118709.8A patent/DE102022118709A1/de active Pending
-
2023
- 2023-07-21 WO PCT/EP2023/070264 patent/WO2024022967A1/de not_active Ceased
- 2023-07-21 US US18/997,639 patent/US12606122B2/en active Active
- 2023-07-21 CN CN202380055232.4A patent/CN119585155A/zh active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202004002806U1 (de) * | 2004-02-23 | 2004-07-15 | Trw Automotive Gmbh | Gurtaufroller |
| DE102016001917A1 (de) * | 2016-02-18 | 2017-08-24 | Trw Automotive Gmbh | Gurtaufroller |
Also Published As
| Publication number | Publication date |
|---|---|
| US20260034958A1 (en) | 2026-02-05 |
| US12606122B2 (en) | 2026-04-21 |
| DE102022118709A1 (de) | 2024-02-01 |
| CN119585155A (zh) | 2025-03-07 |
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