Modular telescopic arm by motor control

A modular telescopic arm by motor control, comprising:

• a knuckle module, a front end the knuckle module having an outer shoulder, a middle shoulder and an inner shoulder, a periphery of the front end of the knuckle module protruding frontward and outward to form the outer shoulder, a middle of a front end of the outer shoulder extending frontward to form the middle shoulder, a periphery of a middle of a front end of the middle shoulder extending frontward to form the inner shoulder;
• a telescopic module mounted to the front end of the knuckle module, the telescopic module including a ball screw assembly, a first flange, a shaft coupler and a limiting ring, the first flange being fastened to the inner shoulder of the knuckle module, one end of the shaft coupler being connected with the ball screw assembly, the other end of the shaft coupler being connected with the first flange, the ball screw assembly having a screw shaft disposed longitudinally, a nut disposed around the screw shaft, and a fixing element, the nut being disposed between the fixing element and the limiting ring, the fixing element being disposed between the nut and the first flange, the shaft coupler being disposed to the screw shaft of the ball screw assembly, and the shaft coupler being close to one end of the fixing element of the ball screw assembly, the limiting ring being disposed to the screw shaft of the ball screw assembly, and the limiting ring facing one end of the nut of the ball screw assembly;
• an outer sleeve module mounted around the one end of the knuckle module, and the outer sleeve module surrounding the telescopic module, the screw shaft being longitudinally mounted in the outer sleeve module;
• and
• an inner sleeve module disposed to the one end of the knuckle module, and the inner sleeve module surrounding a portion of the screw shaft and the limiting ring, the outer sleeve module surrounding the inner sleeve module, one end of the inner sleeve module being fastened around the nut;
• wherein when the modular telescopic arm by motor control is lengthened or shortened, the nut of the telescopic module drives the inner sleeve module to axially move towards the limiting ring or away from the limiting ring, the inner sleeve module is stretched out of the outer sleeve module or retracted into the outer sleeve module, a telescopic length of the inner sleeve module is a movement length of the nut and the inner sleeve module moving towards the limiting ring or moving away from the limiting ring.

A modular telescopic arm by motor control, comprising:

• a knuckle module;
• a telescopic module disposed to one end of the knuckle module, the telescopic module including a ball screw assembly and a limiting ring, the limiting ring being disposed to one end of the ball screw assembly, the ball screw assembly having a screw shaft disposed longitudinally, and a nut disposed around the screw shaft, the nut being able to slide along the screw shaft, the limiting ring being disposed at a free end of the screw shaft, and the limiting ring facing one end of the nut;
• an outer sleeve module mounted around the one end of the knuckle module, and the outer sleeve module surrounding the telescopic module, the screw shaft being longitudinally mounted in the outer sleeve module, an upper portion and a lower portion of an inner surface of the outer sleeve module being connected with a plurality of sliders, a middle of an inner surface of each slider being recessed vertically to form an indentation;
• and
• an inner sleeve module being disposed to the one end of the knuckle module, and the inner sleeve module surrounding a part of the telescopic module, the outer sleeve module surrounding the inner sleeve module, the inner sleeve module surrounding a portion of the screw shaft and the limiting ring, one end of the inner sleeve module being fastened around the nut, the inner sleeve module having a hollow telescopic shaft, a third flange and two slide rails, a top and a bottom of the telescopic shaft being recessed inward to form two assembling grooves, respectively, the third flange being disposed to one end of the telescopic shaft, the other end of the telescopic shaft surrounding the nut of the telescopic module, one sides of the two slide rails being disposed in the two assembling grooves, and the other sides of the two slide rails being slidably disposed in the indentations of the plurality of the sliders;
• wherein when the modular telescopic arm by motor control is lengthened or shortened, the nut of the telescopic module drives the inner sleeve module to axially move towards the limiting ring or away from the limiting ring, the inner sleeve module is stretched out of the outer sleeve module or retracted into the outer sleeve module, a telescopic length of the inner sleeve module is a movement length of the nut and the inner sleeve module moving towards the limiting ring or moving away from the limiting ring.