Crank And Slotted Lever Mechanism In Shaper Machine Parts
Crank And Slotted Lever Mechanism In Shaper Machine Diagram

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Crank and slotted lever in shaper machine. The Computer-Aided Design ('CAD') files and all associated content posted to this website are created, uploaded, managed and owned by third party users. CRANK AND SLOTTED LEVER MECHANISM In this mechanism the ram is actuated by gear drives associated with electric motor. First, the electric motor drives the pinion gear. Next, the pinion gear drives the bull gear which rotates in opposite direction due to external gear meshing. The lever hits one trig dog at the end of this stroke. Now, the lever position is changed. Due to this, the supply pipe supplies the oil on the right side of the piston which moves the ram towards left called as return stroke or nan-cutting stroke.in this stroke the high pressure oil covers on lesser area on the cylinder.

It finds application in shaping machine, slotting machine, rotary internal combustion engine.
In this mechanism link corresponding to the connecting rod (AC) is fixed. The crank CB (in the fig below) revolves about the fixed center C. A slider attached to the crank pin at B slides along the slotted lever AP. This makes the slotted lever oscillate about the pivoted point A
A short link PQ transmits the motion from AP to the arm which reciprocates with the tool along the line of stroke.
We see that the angle β made by the forward or cutting stroke is greater than the angle α described by the return stroke. Hence the name quick return mechanism...
Time of cutting stroke = β

Crank And Slotted Lever Mechanism In Shaper Machine Parts

Time of return stroke α

Pictorial View showing crank and slotted lever mechanism

Here is a video below to show how it works...

If a number of bodies are assembled in such a way that the motion of one causes the constrained predictable motion to the others, it is known as mechanism.

Types of Kinematic chain

Four Bar Chain or Quadric cyclic chain.
Single Slider crank chain.
Double slider crank chain.

When one of the links is fixed in a kinematic chain it is called a mechanism.

Inversion of Mechanisms.

The method of obtaining different mechanisms by fixing different links of a kinematic chain is known as inversion of the mechanism.

The number of mechanisms that can be obtained will be equal to number of links in the kinematic chain.

Inversion of four bar chain

Crank And Slotted Lever Mechanism In Shaper Machine Diagram

Beam Engine (Crank and lever mechanism)
Coupling rod of a locomotive (Double Crank Mechanism)
Watt’s Indicator mechanism (Double lever mechanism)

Inversion Slider Crank Mechanism

Pendulum pump (Bull engine)
Oscillating cylinder engine
Rotary internal combustion engine (Gnome Engine)
Crank and slotted lever Quick return motion mechanism
Wihitworth quick return motion mechanism.