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RK PPT.pptx

  1. 1. Straight line mechanism Name:- PB 50 PB 51 PB 52 PB 53
  2. 2. CONTENT • What is Straight line mechanism. • Roberts Linkage. • Sarrus Linkage. • Watt's linkage. • Hoecken linkage. 26-Nov-22 Jay P kirdat(1032221313), MIT-WPU, Pune 2
  3. 3. What is Straight line mechanism. • A straight-line mechanism is a mechanism that converts any type of rotary or angular motion to perfect or near-perfect straight-line motion, or vice-versa. Straight-line motion is linear motion of definite length or "stroke", every forward stroke being followed by a return stroke, giving reciprocating motion. • The first such mechanism, patented in 1784 by James Watt, produced approximate straight-line motion, referred to by Watt as parallel motion. • Straight-line mechanisms are used in a variety of applications, such as engines, vehicle suspensions, walking robots, and rover wheels 26-Nov-22 Jay P kirdat(1032221313), MIT-WPU, Pune 3
  4. 4. Sarrus linkage • The Sarrus linkage, invented in 1853 by Pierre Frédéric Sarrus, is a mechanical linkage to convert a limited circular motion to a linear motion or vice versa without reference guideways. It is a spatial six-bar linkage (6R) with two groups of three parallel adjacent joint-axes.[3] 26-Nov-22 Anand R. Nadgire, Assistant Professor @ MIT-WPU, Pune 4
  5. 5. Watt's linkage • Watt's linkage (also known as the parallel linkage is a type of mechanical linkage invented by James Watt in which the central moving point of the linkage is constrained to travel on a nearly straight line. It was described in Watt's patent specification of 1784 for the Watt steam engine. 26-Nov-22 Anand R. Nadgire, Assistant Professor @ MIT-WPU, Pune 5
  6. 6. Roberts linkage • A Roberts linkage is a four-bar linkage which converts a rotational motion to approximate straight- line motion. • The linkage was developed by Richard Roberts. 26-Nov-22 Anand R. Nadgire, Assistant Professor @ MIT-WPU, Pune 6
  7. 7. Hoecken linkage • The Hoecken linkage is a four-bar linkage that converts rotational motion to approximate straight-line motion. It is named after Karl Hoecken (1874−1962). • The linkage was first published in 1926. 26-Nov-22 Anand R. Nadgire, Assistant Professor @ MIT-WPU, Pune 7

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