La construction ingénieuse du concasseur à mâchoires Dodge: A Pillar of Simplicity and Control

Within the rugged world of size reduction equipment, le Dodge Jaw Crusher se présente comme un design distinct et historiquement important. Bien que moins courant aujourd'hui que son homologue Blake pour le concassage primaire en raison de limitations de capacité, its unique construction offers specific advantages in control and particle shape, making it invaluable in certain applications like laboratory work or secondary crushing circuits demanding uniform product size. Understanding its construction reveals a machine built on robust principles of leverage and fixed geometry.

Core Design Philosophy: Fixed Point Advantage

The defining characteristic of the Dodge crusher lies in its pivoting point. Unlike the Blake crusher where the swing jaw pivots at the top near the feed opening, the Dodge design pivots its movable jaw at the bottom. This seemingly simple inversion fundamentally alters the crushing action and machine construction:

1. The Frame: Foundation of Strength
Constructed from heavy-duty cast steel or fabricated steel plates welded together.

Designed to withstand immense compressive forces generated during crushing.
Houses bearings for both ends of the eccentric shaft.

Provides rigid mounting points for both jaws and associated hardware.
Often features integrated structural elements to support ancillary equipment like feeders or conveyors.

2. The Stationary Jaw (Mâchoire fixe):
Rigidly bolted or keyed to the frame at its top.
Constructed from high-strength cast steel or heavy plate.
Fitted with replaceable liners made from abrasion-resistant manganese steel alloy to protect against wear from feed material.
Forms one side of the crushing chamber; its lower section is positioned directly opposite the pivot point of the movable jaw.

3. La mâchoire mobile (Mâchoire pivotante):
The heart of the Dodge mechanism.
Pivots on a sturdy hinge pin located at its bottom edge within bearings mounted on either side of the frame.
Also constructed from robust cast/fabricated steel with replaceable manganese steel liners on its working face.
Driven by an eccentric shaft acting near its top via connecting rods/toggles.

4. The Drive Mechanism: Eccentric Motion & Toggles
Arbre excentrique: A hardened forged steel shaft running through large bearings mounted on each side frame wall near the top of the crusher chamber. The central section