Linear motion maintaining mechanism for a mechanical arm

• Main Author: LIN JUI KUN
• Format: Patent
• Language: English; French
• Published: 28.05.1999
• Edition: 6
• Subjects: BEARINGS; BLASTING; CHAMBERS PROVIDED WITH MANIPULATION DEVICES; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; FLEXIBLE SHAFTS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HAND TOOLS; HEATING; LIGHTING; MANIPULATORS; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; PORTABLE POWER-DRIVEN TOOLS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; THERMAL INSULATION IN GENERAL; TRANSPORTING; WEAPONS

The mechanism is composed of a seat (20) movably coupled to a robot stand and having an air or oil cylinder (70) mounted thereon. A connection seat (60) is fastened with a free end of a piston rod (71) of the cylinder for mounting a working hand. A guide rod with a U-shaped cross section is located in a through hole (21) of the seat and does not contact the seat. The guide has a longitudinal slot, the two opposite walls of the slot being provided with a rail enabling the guide rod to move linearly in conjunction with a number of rollers (50a-d) engageable with the rails. Ce mécanisme comprend un siège (20), un vérin pneumatique ou hydraulique pour déplacer une barre de guidage (30) transmettant un mouvement à un bras mécanique qui est fixé à un élément de raccordement. La barre de guidage (30) comporte une fente (31) s'étendant le long de son axe longidudinal. Deux parois opposées de la fente de la barre de guidage comportent respectivement un rail (40) permettant à la barre de guidage de se déplacer linéairement grâce à une pluralité de galets (50D) en prise avec les rails. Les positions axiales des galets peut être ajustée pour corriger toute déviation du mouvement de la barre de guidage.