Working Principle of Double Toggle Jaw Crusher

In the realm of industrial machinery, especially in mining and construction, jaw crushers play a pivotal role. These machines are designed to reduce large rocks into smaller, manageable pieces. Among the various types of jaw crushers, the double toggle jaw crusher stands out for its robust design and operations. But how exactly does it work? Let’s delve into its working principle and understand its functions better.

Understanding Jaw Crushers

Before we dive into the specifics of a double toggle jaw crusher, it’s essential to grasp the basic concept of a jaw crusher. These machines use compressive force to break down materials. The crushing mechanism involves two jaw plates—one stationary and the other moving—that engage in a coordinated dance to crush the material between them.

What is a Double Toggle Jaw Crusher?

A double toggle jaw crusher is characterized by its two toggle plates and two jaws that work in tandem. This design sets it apart from its single toggle counterpart, which uses only one toggle plate for crushing. The dual toggle mechanism allows a more efficient and near-constant crushing motion, making it suitable for heavy-duty tasks.

Working Principle of Double Toggle Jaw Crusher

1. Structure and Motion

• Toggle Plates: The crusher employs two toggle plates, held in place by a pitman or connecting rod. These toggle plates are essential for the movement of the swing jaw.
• Jaws: It features two jaws—one stationary (known as the fixed jaw) and one that moves (swing jaw). The swing jaw moves back and forth due to the motion generated by the toggle plates.
• Crushing Action: The material is fed into the opening between the jaws. As the swing jaw moves towards the fixed jaw, it compresses the material, causing it to break.

2. Mechanical Advantage

• Eccentric Shaft Movement: The motion of the swing jaw is initiated by an eccentric shaft, which turns in a circular motion. This movement translates into the linear motion of the swing jaw.
• Crank-and-Lever Mechanism: The toggle plates act like a crank-and-lever, providing a mechanical advantage that intensifies the crushing force.

3. Efficiency and Output

• Adjustable Output: The crushing chamber's size can often be adjusted by altering the toggle plates' position, allowing for variable output sizes.
• Continuous Crushing Motion: The two-toggle design ensures an almost continuous crushing motion, leading to higher efficiency compared to single toggle jaw crushers.

Advantages of Double Toggle Jaw Crusher

• Sturdiness: The robust construction of double toggle jaw crushers makes them particularly strong and resilient, ideal for heavy-duty crushing operations.
• Increased Durability: The presence of two toggle plates results in a more balanced load distribution, reducing wear and tear on the machinery.
• Higher Crushing Capacity: The efficient and continuous crushing motion means these crushers often have a higher capacity and output compared to other types.

Potential Applications

Double toggle jaw crushers are predominantly used in industries where the task involves crushing hard and abrasive materials. They are highly suitable for:

• Mining: Crushing ore and rock in mineral processing plants.
• Construction: Breaking down materials like gravel, stones, and debris during road construction and building.
• Recycling: Processing concrete and other waste materials for reuse.

Understanding the working principle of a double toggle jaw crusher allows industries to make informed decisions about which equipment suits their needs best. With its unique features, robust construction, and higher efficiency, the double toggle jaw crusher continues to be a vital cog in the machinery needed for large-scale material reduction. By choosing the right crusher for your specific needs, you ensure optimal performance, productivity, and longevity of your operations.

With this knowledge, you can now assess the suitability of a double toggle jaw crusher for your purposes, ensure proper maintenance, and continually optimize your operation.