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with tensioner

A technology of tensioner and belt roll, which is applied in the direction of belt tensioner, etc., can solve the problems of increased gear wear, deformation of supporting position, deformation of belt tensioner or shell, etc., and achieves the effect of less power transmission and guaranteed loss

Active Publication Date: 2019-08-20
TRW AUTOMOTIVE GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These forces may cause the belt tensioner or housing to deform slightly
Said deformation is detrimental to tensioning performance
The high forces can lead to deformation of the bearing point and thus loss of mating surfaces Deformation of the bearing points leads to increased wear in the gears due to deviations from rolling on the involute and thus to a reduced service life
If the bearing distance changes, this also manifests itself as increased drive noise

Method used

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Examples

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Embodiment Construction

[0021] exist figure 1 A belt tensioner 10 in a vehicle safety belt is shown in . The belt tensioner 10 is mounted on a frame 12 of a belt retractor 14 in which a belt reel 16 is rotatably supported (see also image 3 ). In the tensioned situation, the belt tensioner 10 can exert a force acting in the winding direction A on the belt reel 16 , so that the safety belt can be wound on the belt reel 16 and the belt slack can be eliminated.

[0022] The belt tensioner 10 has a transmission housing 18 (see also figure 2 ), in which a receptacle 19 for the axial end 34 of the tape reel 16 is provided. An electronic control unit 22 , a drive motor 24 , a transmission 26 and a clutch 28 are also arranged in the transmission housing 18 .

[0023] as in figure 1 As can also be seen in the figure, a housing cover 20 and a cover 32 for the receptacle 19 of the tape reel 16 are provided on the transmission housing 18 .

[0024] as in figure 2 As can be seen in , the tape reel 16 pro...

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Abstract

A belt tightener (10) for a seat belt in a vehicle comprises a belt reel (16) mounted in a frame (14), a gear case (18) provided with a seat for an axial end of the belt reel (16), a driving motor (24) that includes a drive gear (40) rotating about a drive pin (38), and a transmission (26) that is coupled to the drive gear (40) and to a coupling (28) located at the axial end of the belt reel (16). The transmission (26) includes at least one first incremental gear (42) that is coupled to the drive gear (40). A case cap (20) on the gear case (18) can interlock with locking means (64) on the gear case (18). The first incremental gear (42) is rotatably mounted in the gear case (18) and in the case cap (20) by means of a bearing bolt (60). The case cap (20) is additionally secured to the gear case (18) by a securing bolt (66) which lies opposite the bearing bolt (60) in relation to the drive pin (38) of the driving motor (24).

Description

technical field [0001] The invention relates to a belt tensioner for seat belts in vehicles, which has a belt reel supported in a frame and has a transmission housing in which a Receptacle at the axial end of the belt reel, wherein the belt tensioner has a drive motor comprising a drive gear rotating around a drive shaft and a transmission mechanism which is coupled to the drive gear on the one hand and On the other hand, it is coupled to a clutch arranged at the axial end of the tape drum. The transmission mechanism has at least one first stepped gear coupled with the drive gear. A housing cover is provided on the housing, and the housing cover can be latched on the transmission housing by means of a locking device, wherein the first stepped gear is rotatably supported in the transmission housing by means of a bearing bolt and is mounted on the transmission housing. in the housing cover. Background technique [0002] Such a belt tensioner is used to retract the safety be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60R22/34
CPCB60R22/34
Inventor W·霍尔贝因
Owner TRW AUTOMOTIVE GMBH
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