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Straight line mechanism
Name:- PB 50
PB 51
PB 52
PB 53
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
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
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
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
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
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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RK PPT.pptx

  • 1. Straight line mechanism Name:- PB 50 PB 51 PB 52 PB 53
  • 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. 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. 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. 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. 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. 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