A device for pivoting a swinging arm, such as an arm of a...

B - Operations – Transporting – 25 – J

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Details

B25J 9/10 (2006.01)

Patent

CA 2294268

A robot arm is supported by a pillar (14) rotatable about a vertical axis (A) and rotated by a reversible electric motor (88). The output shaft (90) of the motor (88) is connected to the pillar (14) by means of a mechanical reduction transmission which comprises a pair of planetary reduction units (62, 64). The driving members of both reduction units (62, 64) are fixed angularly to the output shaft (90) of the motor (88). The driven members (68, 70) of both reduction units (62, 64) are fixed angularly to the pillar (14). When the device is in operation, the peripheral rings (72, 74) of both reduction units (62, 64) are fixed to a structure (42) which supports the pillar (14). The angular position of at least one of the peripheral rings (72) is adjustable about the vertical axis (A) relative to the other ring (74) to enable the play in the internal gearings of the reduction units (62, 64) to be cancelled out.

Ce bras de robot est soutenu par une colonne (14), laquelle peut tourner autour d'un axe vertical (A) et est mise en rotation par un moteur électrique réversible (88). L'arbre de sortie (90) du moteur (88) est relié à la colonne (14) au moyen d'une transmission de réduction mécanique comprenant une paire d'unités planétaires réductrices (62, 64) dont les éléments d'entraînement sont fixés de manière angulaire sur l'arbre de sortie (90) du moteur (88). Les éléments entraînés (68, 70) des deux unités réductrices (62, 64) sont fixés de manière angulaire sur la colonne (14). Lorsque le dispositif fonctionne, les couronnes périphériques (72, 74) des deux unités réductrices (62, 64) sont fixées sur une structure (42) qui soutient la colonne (14). La position angulaire d'au moins l'une de ces couronnes (72) est réglable autour de l'axe vertical (A) par rapport à l'autre couronne (74) de façon à pouvoir annuler le jeu dans les engrenages intérieurs des unités planétaires (62, 64).

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