Lead screw drive for a power liftgate

Details Lead screw drive for a power liftgate Lead screw drive for a power liftgate

B - Operations, Transporting

60

J

B60J 5/10 (2006.01) E05F 15/12 (2006.01)

Patent

CA 2412517

A power drive assembly moves a liftgate (12) of a motor vehicle (10) between its open and closed positions. The motor vehicle (10) defines an opening and the liftgate (12) closes the opening when the liftgate (12) is in its closed position. The power drive assembly (22) includes a base (24) that is fixedly secured to the motor vehicle (10) at a position in spaced relation to the opening. A drive mechanism (38) is fixedly secured to the guide. The drive mechanism (38) converts electrical energy into a linear force. The power drive assembly (22) includes a translation linkage (58) connected to the drive mechanism (38) for receiving the linear force and translating it into a nonlinear force to move the liftgate (12) between the open position and the closed position. A nut (52), secured to the translation linkage (58), moves the translation linkage (58) as it travels along a lead screw (50) that is rotated by a motor (40).

L'invention concerne une unité de commande mécanique destinée à l'ouverture et à la fermeture d'un hayon relevable d'une automobile. L'automobile définit une ouverture qui, lorsque le hayon relevable est abaissé, est fermée. L'unité de commande mécanique comprend une base solidement fixée sur l'automobile, dans une position espacée par rapport à l'ouverture. Un mécanisme d'entraînement est solidement fixé sur le guide. Le mécanisme d'entraînement transforme l'énergie électrique en énergie mécanique linéaire. L'unité de commande mécanique comprend un mécanisme à déplacement rectiligne connecté au mécanisme d'entraînement, destiné à recevoir l'énergie mécanique linéaire et à la transformer en énergie non linéaire, afin d'ouvrir et de fermer le hayon relevable. Un écrou, fixé sur le mécanisme à déplacement rectiligne, permet le déplacement du mécanisme de déplacement rectiligne le long d'une vis-mère mise en rotation par un moteur électrique.

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