Six binaries and two quaternary links. Build cardboard models of the linkages and describe the motions of each inversion. Bisect line C1C2 and line C2C3 and extend their perpendicular bisectors until they intersect. The intersection of these two lines establishes the point O2. Draw construction lines from point A1 to A2 and from point A2 to A3. Given: Crank dwell period: 90 deg.
Both blocks have pins that engage the holes in links 2, 3, 5, and 6. Select a point on this line and call it O2. Given: Link lengths: Solution: 1. The cross-hatched pivot pins at O2, O4 and O8 are attached to the ground link 1. Line O2O4 is link 1 ground link for the fourbar. Solution: See Figure P2-1a and Mathcad file P0209.
Solution: See Mathcad file P0217. Repeat steps 2 and 3 for lines D1D2 and D2D3. The input is the link 2 and the output is link 4. Further, the linkage shown is a Watt's sixbar inversion I since neither of the ternary links is grounded. Connect E1 with G and label it link 2.
The cross-hatched pivot pin at O2 is attached to the ground link 1. A2 Draw a circle about O6 with a radius of one-half the length C1C2 and label the intersections of the circle with the extended line as D2 and D3. The block on the right is not threaded and acts as a bearing. Label the other end A. A hockey puck on the ice g. Build a cardboard model and determine the toggle positions and the minimum transmission angle.
A pendulum ride Pure rotation. Bisect these lines and extend their perpendicular bisectors into the base. Letter the joints alphabetically, starting with A. Given: Link lengths: Solution: 1. Given: Position 1 offsets: Solution: See figure below for one possible solution.
Brake pads contacting the wheel rim. Using Table 3-1 and the required length of straight-line motion, determine the link lengths. Since these two links are equal in length and, if we say they are finite in length but very long, the rotability of the mechanism will be determined by the relative lengths of 2 and 3. In your shoes, I would ignore it. It was a keeper and proud of the cheekiness displayed. Select a point on this line and call it O6. The output dyad consists of links 7 and 8.
Solution: See Figure P2-4 and Mathcad file P0221. The corkscrew is made from 4 pieces: the body 1 , the screw 2 , and two arms with teeth 3 , one of which is redundant. Given: Link lengths: Solution: 1. Letter the joints alphabetically, starting with A. Determine the Grashof condition of the mechanism from inequality 2.
They are force closed by ligaments that hold them together. Bisect it to locate the fixed pivot O4. Make every attempt to review your record well in advance for your promotion opportunity. The input is link 2 and the output is link 4. All fixed pivots should be on the base.