A single-toggle jaw crusher operates based on a simple yet effective mechanism. Below is a description of its working principle along with a reference to a typical figure:
Working Principle of Single-Toggle Jaw Crusher
1. Fixed & Movable Jaw Plates
– The crusher consists of two jaw plates:
– Fixed jaw plate (stationary)
– Movable jaw plate (attached to the pitman/toggle plate mechanism)
2. Eccentric Shaft Movement
– A motor drives an eccentric shaft, which causes the movable jaw to move in an elliptical motion.
– The downward stroke compresses the material against the fixed jaw, crushing it.
3. Crushing Action
– When the movable jaw moves forward (closing stroke), it crushes the feed material against the fixed jaw.
– On the return stroke (opening), crushed material falls downward due to gravity and exits through the discharge opening at the bottom.
4. Toggle Plate Function
– The toggle plate acts as a safety mechanism, preventing damage by bending or breaking if an uncrushable object enters the chamber.
5. Adjustable Discharge Setting
– gap between the jaws can be adjusted to control the output size of crushed material.
Figure Reference
A typical single-toggle jaw crusher diagram includes:
– Eccentric shaft (rotating element)
– Movable jaw (swinging action)
– Fixed jaw (stationary crushing surface)
– Toggle plate (safety and support mechanism)
Here’s a simplified representation:
“`
____________________
/ \
/ Fixed Jaw Plate \
/________________________\
| |
| Movable Jaw Plate |
| (Connected to Pitman)|
| |
| Eccentric Shaft |
|______________________|
“`
For a detailed schematic, refer to engineering manuals or manufacturer diagrams from companies like Metso, Sandvik, or Terex.
Would you like a more detailed breakdown of forces or kinematics involved?