Belt tensioner and method for assembly

Details Belt tensioner and method for assembly Belt tensioner and method for assembly

F - Mech Eng,Light,Heat,Weapons

16

H

F16H 7/08 (2006.01)

Patent

CA 2631357

A first belt tensioner includes an arm (14, 112, 212), spring case (16, 114, 214), coil spring (12, 116, 216), and arm plate (118, 218). The arm (14, 112, 212) is adapted to support an idler pulley (20, 120, 220) and has a hook portion (22, 122, 222). The spring case (16, 114, 214) is disposed in the arm (14, 112, 212) and has a first spring seat (124). The spring (12, 116, 216) is disposed in the spring case (16, 114, 214). The arm plate (118, 218) has a second spring seat (132, 232). The spring (12, 116, 216) is longitudinally compressed between the arm plate (118, 218) and the spring case (16, 114, 214). The spring (12, 116, 216) is in torsion, with the end portions (18; 128, 130; 230) of the spring (12, 116, 216) seated against a corresponding spring seat (124, 132) and with the arm plate (118, 218) rotationally positioned under the hook portion (22, 122, 222). A method for assembling the first belt tensioner (110, 210) includes using the arm plate (118, 218) to longitudinally compress the spring (116, 216) and rotating the arm plate (118, 218). A second belt tensioner (10, 110, 210) includes an arm (14, 112, 212), spring case (16, 114, 214), coil spring (12, 116, 216), arm plate (118, 218), and pivot bushing (24, 148, 248).

Selon l'invention, un premier tensionneur de ceinture comprend un bras (14, 112, 212), un logement de ressort (16, 114, 214), un ressort hélicoïdal (12, 116, 216), et une plaque de bras (118, 218). Le bras (14, 112, 212) est conçu pour supporter une poulie libre (20, 120, 220) et comprend une partie crochet (22, 122, 222). Le logement de ressort (16, 114, 214) est placé dans le bras (14, 112, 212) et comprend un premier siège de ressort (124). Le ressort (12, 116, 216) est placé dans le logement de ressort (16, 114, 214). La plaque de bras (118, 218) comprend un second siège de ressort (132, 232). Le ressort (12, 116, 216) est comprimé longitudinalement entre la plaque de bras (118, 218) et le logement de ressort (16, 114, 214). Le ressort (12, 116, 216) est en torsion, avec les parties d'extrémité (18, 128, 130, 230) du ressort (12, 116, 216) appuyées contre un siège de ressort (124, 132) correspondant et avec la plaque de bras (118, 218) positionnée en rotation sous la partie crochet (22, 122, 222). Un procédé d'assemblage du premier tensionneur de ceinture (110, 210) comprend une utilisation de la plaque de bras (118, 218) pour comprimer longitudinalement le ressort (116, 216) et une rotation de la plaque de bras (118, 218). Un second tensionneur de ceinture (10, 110, 210) comprend un bras (14, 112, 212), un logement de ressort (16, 114, 214), un ressort hélicoïdal (12, 116, 216), une plaque de bras (118, 218), et un palier rotatif (24, 148, 248).

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