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Mechanical Engineering: Motion Transmission

Mechanical Engineering: Motion Transmission. Screw Gear System. A screw gear, also known as a worm gear, is a spirally threaded shaft and a wheel a wheel with teeth that mesh into it. There are two types of screw gear systems that can transform motion from rotational -> translational.

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Mechanical Engineering: Motion Transmission

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  1. Mechanical Engineering: Motion Transmission

  2. Screw Gear System • A screw gear, also known as a worm gear, is a spirally threaded shaft and a wheel a wheel with teeth that mesh into it. • There are two types of screw gear systems that can transform motion from rotational -> translational.

  3. Screw Gear System • Type 1: The screw gear is the driver that transforms rotational motion into translational motion. The nut must be guided so that it does not rotate with the screw.

  4. Screw Gear System • Type 2: The nut is the driver and transforms rotational motion into translational motion. The nut must be fixed in a way that only allows for rotation.

  5. Cam and Follower • A cam is a mechanism used especially for transforming rotational motion to translational motion. • A cam and follower is formed by direct contact of two mechanisms: the driver (cam) and the driven part (follower). • The shape of the contacting surfaces determines the movement of the mechanism.

  6. Cam and Follower

  7. Connecting Rods • A connecting rod acts as a link for connecting motion from the crank to the slide. • Together they form a simple mechanism that converts translational motion to rotational motion. • Connecting rods allow for reversibility: able to convert rotational motion into translational motion.

  8. Connecting Rods Connecting Rod

  9. Slides • Slides can allow for the transformation of linear motion into rotational motion and vice versa.

  10. Slides Slide

  11. Cranks • Cranks are similar to a cam. They convert rotational motion into translational motion and vice versa. • The difference between cams and cranks is that cranks only work rotationally and only ever have one drive action per revolution.

  12. Cranks

  13. Rotating Slider Crank Mechanism • Slider-crank mechanisms involve both rotational and translational motion. • The crank rotates at constant speed to repeatedly move an object. • A simple way to reversibly convert rotational motion to translational motion.

  14. Rack-and-Pinion • Cranks are similar to a cam. They convert rotational motion into translational motion and vice versa. • The difference between cams and cranks is that cranks only work rotationally and only ever have one drive action per revolution.

  15. Rack-and-Pinion

  16. Motion Transformation Symbols

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