Lecture 10 Drag - link mechanism

Crank - Crank [Double Crank] Mechanism

Or

Crank - Drag link - Crank Mechanism :-

Second link, crank that is shortest link in terms of dimensions is fixed or held stationary, the resulting four bar linkage / (planar) mechanism is Crank - Drag link - Crank Mechanism.

1st link= frame = Originally the "crank"[Link 2]

2nd driver link = driving crank = Originally the "coupler"[Link 3]

3rd link = coupler or drag link = Originally the "rocker"[Link 4]

4th driven link Or follower link = crank = Originally the "frame" [Link 1]

2nd link is Input Link and nature of Input Motion that is available of "Driving Crank" (left side Crank with respect to frame) is Continuous Rotation at constant angular speed.

4th link is Output Link and desired Output Motion of "Driven Crank"  Or Follower (right side Crank with respect to frame) is Continuous Rotation at varying angular speed.

Note: Coupler (Revised 3rd link ) is the drag link.

Popular posts from this blog

Construction Line, Line Type , Line Type Scale

Function of CAD Software  Drawing of objects using various elements (1) CONSTRUCTION LINE Construction line creates a line of infinite length At the command prompt, enter XLINE Command : XLINE and press enter Specify a point or [Hor/Ver/Ang/Bisect/Offset : hor [ Type 'hor' for horizontal line] Specify through point : [Select a point on screen] Specify through point : [Select another point] The CONSTRUCTION LINE passes through the entire drawing area. Use: Projecting points from FRONT VIEW to TOP VIEW or SIDE VIEW (2) One can type LINETYPE at the command prompt to invoke the line type manager dialogue box. Select required LINETYPE and click OK (3)One can type LTSCALE at command prompt to change the LINETYPE scale. At the command prompt, enter LTSCALE Command : LTSCALE New scale factor <current >: Enter a positive real value or press enter
Read more