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  • Users: raz2
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  1. raz2

    Kinematics - force analysis

    The connecting link is a two force member. Fx/Fy = tan (theta)
  2. raz2

    Kinematics - force analysis

    Draw a free body diagram. Sum of forces = 0. Draw a force triangle. www.prclinks.com
  3. raz2

    struggling with project

    I would use a four bar linkage
  4. raz2

    How do I calculate forces and moments for this gripper

    Draw these three lines which are all the forces on the griper. 1 is the grip force. 3 will give you the torque at the pivot of the tan geared link. Forces intersect at one point. (sum of moments =0) Then simply draw a force triangle with sides in these directions to get the magnitude. (sum...
  5. raz2

    How do I calculate forces and moments for this gripper

    The shape of the link is not relevant. Only need to know the pivot locations and the external force contact location and direction.
  6. raz2

    How do I calculate forces and moments for this gripper

    Force analysis of a four bar linkage is not difficult in static equilibrium. Most kinematics textbooks will cover this topic. I think Theory of Machines and Mechanisms (Uicker, Pennock) does it best. See pages 538-545 (4th edition). You draw free body diagrams of each link starting with...
  7. raz2

    Catia V5 Kinematic suspension assembly help

    If you add a picture or video of the system it will help us understand the problem.
  8. raz2

    CATIA SKETCH GRAPHICS

    Tools-Options-Mechanical Design-Sketcher
  9. raz2

    Not sure where to start

    If you add a picture/sketch of what you want it would help. How big of an area are you trying to grind?
  10. raz2

    Seat belt mechanism design

    it could also be friction holding it in place until the centrifugal force overcomes it.
  11. raz2

    Butterfly valve linkage calculatulation

    thread408-278533 Butterfly valve linkage calculation Follow up response This is a classic function generator problem. Input and output specified angular relationships. Define the input angles you want and the corresponding output angles you want. Your mechanism kinematics textbook will show...
  12. raz2

    mechanism for angular stroke

    construction instructionshttp://files.engineering.com/getfile.aspx?folder=8d1f23b5-847e-4e14-a777-7a6f569ed356&file=DETC2015-47118_remote_center_of_motion.pdf
  13. raz2

    mechanism for angular stroke

    Having a rigid body rotate around a point is not possible with a 4 bar linkage if you cannot use the center point as a pivot. However this can be done with a 6 bar linkage. It is called a remote center mechanism. I'll attach a video to illustrate and a paper describing the construction...

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