F - Mech Eng,Light,Heat,Weapons – 16 – H
Patent
F - Mech Eng,Light,Heat,Weapons
16
H
F16H 25/20 (2006.01) B60T 3/00 (2006.01) B65G 69/00 (2006.01) F16H 25/24 (2006.01)
Patent
CA 2194241
The drive screw system comprises a drive screw (12) and a drive nut (26) adapted for driving a cooperating member such as a vehicle restraining device (50) between the proximal (12p) and distal (12d) ends of the drive screw (12). At least one bearing assembly (36, 38) is mounted to a track (32) for supporting the drive screw (12) and automatically moving between the proximal (12p) and distal (12d) ends of the drive screw (12) in response to the drive nut (26) to automatically maintain a predetermined maximum unsupported length of the drive screw (12). Each bearing assembly (36, 38) comprises two bearing supports (36d 36p; 38d, 38p) connected at a fixed length and which are coaxially disposed relative to each other. In one embodiment, the length of each bearing assembly are integral multiples of the smallest fixed connecting length and the drive screw (12) has stationary bearing supports (20, 22) disposed at the proximal (12p) and distal (12d) ends wherein the distance between the stationary supports (20, 22) is (n+1)*L where n is the number of bearing assemblies and L is the length of the shortest bearing assembly.
Le système de vis de guidage selon l'invention comprend une vis de guidage (12) et un écrou de guidage (26) conçus pour entraîner un élément coopérant tel qu'un dispositif de retenue (50) de véhicule placé entre les extrémités proximale (12p) et distale (12d) de la vis de guidage (12). Au moins un ensemble de support (36, 38) monté sur un rail (32) est conçu pour supporter la vis de guidage (12) et se déplacer automatiquement entre les extrémités proximale (12p) et distale (12d) de la vis de guidage (12) en réponse à l'écrou de guidage (26) pour maintenir une longueur maximum prédéterminée non soutenue de la vis de guidage (12). Chaque ensemble de support (36, 38) comprend deux supports (36d, 36p; 38d, 38p) reliés à une longueur prédéterminée et placés coaxialement l'un par rapport à l'autre. Dans un mode de réalisation, la longueur de chaque ensemble de support correspond à des multiples entiers de la longueur de liaison fixe la plus faible, et la vis de guidage comprend des supports stationnaires (20, 22) placés aux extrémités proximale (12p) et distale (12d), la distance entre les supports stationnaires (20, 22) étant de (n+1)*L, n correspondant au nombre d'ensembles de support et L à la longueur de l'ensemble de support le plus court.
Goudreau Gage Dubuc
Rite-Hite Corporation
Rite-Hite Holding Corporation
LandOfFree
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