Webbing winding device

B - Operations – Transporting – 60 – R

Patent

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Details

B60R 22/48 (2006.01) B60R 22/34 (2006.01) B60R 22/44 (2006.01) B60R 22/46 (2006.01)

Patent

CA 2563492

A webbing winding device (10), wherein a worm gear (34) connected to a motor (44) is meshed with a gear wheel (32), and when the worm gear (34) is rotated, a drive force is transmitted to a winding shaft (20) through the gear wheel (32) and a clutch (26) to rotate the winding shaft in the winding direction. The helix angles of the teeth of the worm gear (34) and the gear wheel (32) are set so that a thrust force generated along the axial direction of the gear wheel (32) faces the leg plate (16) fixing side of a case (30). Since the thrust force acts on the leg plate (16) fixing side of the case (30), i.e., on a frame (12), the case (30) and the clutch (31) need not have high strength and rigidity.

Un dispositif d~enroulement de sangles (10), dans lequel une vis sans fin (34) raccordée à un moteur (44) est imbriquée dans une roue d~engrenage (32), et quand la vis sans fin (34) est tournée, une force motrice est transmise à un arbre d~enroulement (20) par le biais de la roue d~engrenage (32) et d~un embrayage (26) pour faire tourner l~arbre d~enroulement dans la direction de l~enroulement. Les angles d~hélice des dents de la vis sans fin (34) et de la roue d~engrenage (32) sont réglés de sorte qu~un effort radial de coupe généré le long de la direction axiale de la roue d~engrenage (32) fait face au côté de fixation de la plaque de pied (16) d~un boîtier (30). Étant donné que l'effort radial de coupe agit sur le côté de fixation de la plaque de pied (16) du boîtier (30), c~est-à-dire sur un cadre (12), le boîtier (30) et l~embrayage (31) n'ont pas besoin de présenter une résistance et une rigidité élevées.

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