Tongli Jaw crusher Introduction

Jaw crushers are machines that crush material between a moving and a stationary piece of steel, creating a V-shaped cavity called the crushing chamber. They are used for primary and sometimes secondary size reduction of various materials, such as rocks, ores, concrete, etc. Jaw crushers use compressive force for breaking material, which is achieved by the two jaws of the crusher. One jaw is fixed while the other moves back and forth and is driven by a motor. The gap between the jaws can be adjusted to control the output size. Tongli Jaw crushers are widely used in various industries, such as mining, quarrying, recycling, demolition, etc. They are also available in different sizes and capacities to suit different applications and need.

Tongli Jaw crusher structure

Tongli jaw crushers can handle various types of materials, from hard and abrasive to soft and sticky, with high efficiency and reliability. We will introduce the main components of a jaw crusher and explain their functions and importance.

Frame: The frame is the main structural component of a jaw crusher that supports and houses the other components. It provides the necessary rigidity and strength to withstand the crushing forces. The frame is designed to absorb shocks and vibrations generated during the crushing process, ensuring the stability of the crusher. It also facilitates the installation of other components, allowing for easy maintenance and replacement when necessary. At Tongli, we use high-quality steel plates and castings to make our frames, ensuring their durability and resistance to deformation.

Jaw Plates: Jaw plates are the wear-resistant parts that come into direct contact with the material being crushed. They are typically made from manganese steel or other durable materials. The primary function of jaw plates is to crush the incoming material against the fixed jaw or the movable jaw. Proper selection and maintenance of jaw plates are crucial to achieve efficient crushing and minimize wear and tear. Jaw plates can be interchanged to achieve different crushing results, and they play a key role in determining the size and shape of the final product. At Tongli, we offer various types of jaw plates with different profiles and hardness levels, depending on the material characteristics and customer requirements.

Eccentric Shaft: The eccentric shaft is a critical component that provides the necessary rotational movement to the swing jaw. This movement facilitates the crushing process by generating a compressive force against the fixed jaw. The eccentric motion is achieved through the interaction between the eccentric shaft and the toggle plate, allowing the material to be crushed progressively as it moves down the crushing chamber. Proper lubrication of the eccentric shaft is essential to ensure smooth operation and extend the component’s lifespan. At Tongli, we use high-strength alloy steel to make our eccentric shafts, ensuring their durability and performance.

Toggle Plate: The toggle plate is a safety mechanism that connects the swinging jaw to the main frame. It helps prevent excessive loads and stresses that could lead to damage or failure of the crusher. The toggle plate also serves as a means to adjust the discharge setting by changing the angle between the two jaws. This feature allows for fine-tuning the size of the crushed material. Furthermore, the toggle plate absorbs shocks and protects the crusher from overloads, enhancing its durability and reliability. At Tongli, we use high-quality steel plates to make our toggle plates, ensuring their strength and resistance to deformation.

Pitman Arm: The pitman arm is responsible for the reciprocating motion of the swing jaw. It connects the eccentric shaft to the swinging jaw, converting the rotational motion of the eccentric shaft into the up-and-down movement of the jaw. The proper design and geometry of the pitman arm contribute to the efficient crushing action, ensuring that the material is crushed uniformly. Additionally, the pitman arm’s robust construction is crucial for handling the high forces and stresses generated during crushing. At Tongli, we use high-strength alloy steel to make our pitman arms, ensuring their durability and performance.

Flywheel: The flywheel is a heavy rotating component that stores and releases energy during the crushing cycle. It aids in the smooth and balanced operation of the crusher by maintaining a consistent speed and reducing fluctuations in the power supply. The energy stored in the flywheel helps overcome inertia during startup and provides extra crushing power during high-demand situations. The flywheel also plays a role in evening out the load distribution, which can extend the lifespan of other components by reducing stress and wear. At Tongli, we use high-quality cast iron or steel to make our flywheels, ensuring their stability and reliability.

Tongli Jaw crusher design principle

Versatility and Wide Range of Applications: One of the primary advantages of a jaw crusher is its versatility. Jaw crushers excel at processing a wide range of materials, from hard and abrasive rocks to softer and more fragile ones. This adaptability makes them suitable for various industries, including mining, construction, recycling, and more. Whether it’s crushing aggregates for construction projects or breaking down ores for extraction, jaw crushers can handle diverse materials effectively.

High Crushing Efficiency: Jaw crushers are designed to efficiently break down hard and large materials into smaller, manageable sizes. The crushing process involves a continuous compressive force applied by the moving jaw against the stationary jaw. This results in efficient reduction of material size, enabling finer end products. The efficient crushing action minimizes energy wastage, leading to cost-effective operation and reduced environmental impact.

Adjustable Discharge Setting: Another advantage of jaw crushers is their ability to adjust the discharge setting. By changing the gap between the jaws, operators can control the size of the crushed material. This feature allows for precise product sizing according to specific requirements. From coarse to fine materials, jaw crushers offer flexibility in producing the desired output, making them versatile tools for meeting varied end-product specifications.

Simple Maintenance and Operation: Jaw crushers are designed for user-friendly maintenance and operation. Most components are easily accessible, facilitating routine inspections, cleaning, and replacement of wear parts. This simplicity reduces downtime and maintenance costs. Additionally, modern jaw crushers often come equipped with advanced technologies for monitoring and optimizing crusher performance, further simplifying operation and ensuring consistent productivity.

Durability and Longevity: Jaw crushers are built to withstand demanding environments, using robust materials and engineering. They are engineered to handle heavy loads and high impact forces, ensuring prolonged operational life. Proper maintenance and suitable wear parts contribute to the longevity of jaw crushers, allowing them to perform reliably over extended periods, minimizing downtime and replacement costs.

Cost-Effective Crushing Solution: Jaw crushers offer a cost-effective solution for primary crushing needs. Their efficient crushing action and relatively low operational costs make them a preferred choice for many industries. With proper maintenance and wear part management, jaw crushers provide a dependable and economical option for producing high-quality aggregates or processed materials.

Specifications of tongli Jaw crusher

Note: * Capacity based on material compressive strength 300MPa

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Zhejiang Tongli Heavy Machinery Manufacturing Co., Ltd (Formerly known as Tongxiang Coal&Mining Machinery Factory) established in year 1958 is a member of the Chinese National Building Material Machinery Association. Tongli is on the vendor list of designated production enterprise of the Ministry of Coal Industry. ISO9001、ISO14001、ISO45001 certified, accredited as High-tech & new technology enterprise of Zhejiang Province. With 65+ years of experience, Tongli has earned first class R&D and manufacturing capabilities, dedicated to provide satisfactory manufacturing equipments for global customers.   

Industry Knowledge extension

What are the advantages of using a jaw crusher over other types of crushers?

Jaw crusher can handle hard and abrasive materials that may damage other crushers. Jaw crusher can produce a uniform and consistent product size with minimal fines. Jaw crusher have a simple and robust design that is easy to operate and maintain. Jaw crusher have a low operating cost and energy consumption compared to other crushers.

How can you optimize the output of a jaw crusher?

Choosing the right feed size and type that matches the capacity and characteristics of the crusher. Adjusting the crusher settings to achieve the desired product size and shape. Replacing or repairing the worn or damaged jaw plates regularly to maintain the crushing efficiency and quality. Performing regular inspections and maintenance to ensure the smooth operation of the crusher.