A typical jambtype tilting garage door opening mechanism is

A typical jamb-type tilting garage door opening mechanism is illustrated below: (Fitmaster Tilt-A-Dor^TM. http://www.world-business.net/australia/Tilt.htm accessed. Point G is the centre of mass, and point H is the fixing point for the garage door oper angle between AC and horizontal, omega is the corresponding angular speed. In this assignment you are required to write a report concerning the planar above. In your report, you must: Describe the links and pairs and calculate the mobility. Draw a fully dimensioned drawing of the mechanism shown, making reason; all dimensions necessary to define the location of all points A to G. Estimate the mass of the door. You may assume that other mechanism com massless. Plot the locus of all points from \"door closed\" to \"door open\".

Solution

The locus point from the door closed to the door open

For the line AC, we have that the locus would be a circle centered in the point C with a radius of 1.5\".

For the line BDE, we have that are two locus. One for the segment BD and another for the segment DE, for BD we have a circle centered in the point D with a radius of 1.25\" and for DE we have a circle centered in the point D with a radius of 0.55\"

For the line EF, we have that the locus would be a circle centered in the point F with a radius of 2\".

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