Under normal operating conditions, the toggle plate and toggle seat in a jaw crusher often lack effective lubrication, preventing the formation of an oil film between them. Furthermore, dust can ingress into this area. Consequently, the interaction between the toggle plate and the toggle seat becomes a state of dry friction and abrasive wear. This leads to rapid wear of both components and a short service life. Therefore, extending the service life of the jaw crusher toggle plate is a crucial task. Based on specific working conditions, we have developed improvement solutions for toggle plate wear.

Improvement Solutions for Jaw Crusher Toggle Plate:

1. Converting Sliding Friction to Rolling Friction: Typically, the swing angle of the toggle plate does not exceed 10 degrees. In this design, the toggle head and seat operate with sliding friction. By modifying the structure, sliding friction can be transformed into rolling friction, thereby improving transmission efficiency, reducing wear, and extending service life.

2. Changing the Lubricating Fluid between the Toggle Head and Seat: The wear of the toggle head and seat is influenced not only by the motion characteristics but also by lubrication conditions and dust. The most effective method to improve the wear condition between component surfaces is proper lubrication of the jaw crusher. This enhances crusher efficiency, extends component life, and ensures smooth machine operation. If conventional lubrication is ineffective, water lubrication can be adopted. Water can both carry away heat generated by friction and flush away dust, thereby prolonging the life of the toggle head and seat.

3. Adopting a Rational Toggle Head and Seat Structure: Based on the principle of replacing sliding with rolling, and to facilitate replacement and extend life, Hongxing Heavy Industry designed the toggle seat into a cylindrical shape with square ends for easy fixation. When one side wears out, the seat can be flipped to use another side, allowing for up to four rotations and significantly extending service life.

4. Improving the Matching Surface Shape between the Toggle Seat and Block: In older jaw crusher models, the matching surface between the toggle seat and the toggle block is typically a sliding type. Under prolonged impact and compression, the toggle seat can deform and expand, making it extremely difficult to remove from the block's recess during replacement. The solution is to change the matching surface shape to a trapezoidal design.

Toggle Plate Drop

When non-crushable materials (tramp iron) enter the crushing chamber along with the ore, various linkage components may fail as the forces exceed the material's allowable limits. To protect other components from damage, the toggle plate—a relatively simple and smaller part—is intentionally designed with lower strength to act as a safety device. If the toggle plate drops during operation, the cause must be investigated. Generally, the reasons for toggle plate drop include:

1. Damaged or loose tension rod spring.

2. Broken tension rod or loosened nut.

3. Misalignment between the toggle plate and the toggle plate seat (not parallel).

4. The hardness or toughness of the material being crushed exceeds the crusher's specifications.

5. Incorrect motor wiring (reverse rotation).

6. Jaw plate shift, causing tooth tip-to-tooth tip contact.